Method and apparatus for determining cell timing in wireless communication system

FIELD: information technology.

SUBSTANCE: techniques for determining cell timing in a wireless communication system are described. User equipment (UE) may obtain received samples which include at least one synchronisation signal generated based on a cell identifier. The UE may correlate the received samples with the at least one synchronisation signal in the time domain at different time offsets to obtain energies for multiple timing hypotheses. The UE may identify at least one detected peak based on the energies for the multiple timing hypotheses. The UE may then update a set of candidate peaks based on the at least one detected peak and may identify a candidate peak with signal strength exceeding the signal strength of a peak being tracked. The UE may provide the timing of the identified candidate peak as the timing of the cell.

EFFECT: faster cell search.

35 cl, 11 dwg, 1 tbl

 

The present application claims the priority of provisional patent application U.S. No. 60/953971, entitled "TIMING SEARCH METHOD FOR E-UTRAN", filed August 3, 2007, were submitted to the assignee of this application and herein by reference.

The LEVEL of TECHNOLOGY

The technical field

The present disclosure, in General, relates to communications, and more particularly to a technology for determining the temporal reference cell in a wireless communications system.

The level of technology

Wireless communication systems are widely deployed to provide various communication content such as voice, video, packet data, messaging, broadcast, etc., These wireless systems can be systems, multiple access, allowing support for multiple users by sharing available system resources. Examples of such multiple access systems include a system of multiple access, code division multiple access (CDMA)systems, multiple access with time division multiplexing (TDMA)systems, multiple access frequency division multiple access (FDMA)systems, orthogonal FDMA (OFDMA) and FDMA system with single-carrier (SC-FDMA).

The wireless communications system may include a certain number of cells, which can support tie is for a specific number of user devices (UE). The UE may receive the transmission from the cell. The transfer may take place through one or more of the transmission paths of signals, which may include the transmission path of direct signals from the cell to the UE, and the transmission paths of the reflected signals generated by the various structures in the environment. Different paths of transmission signals typically have different channel gain and delay spread. Channel gain and/or delay of each transmission path signals may vary due to various factors such as the mobility of the UE, changes in the environment, etc. in Addition, new routes of transmission signals can be generated, and the existing paths of transmission signals may disappear as a result of these factors. It may be desirable to determine a temporal reference cell so that intensive paths of transmission signals can be captured, and the transfer from the cell can reliably be taken.

The INVENTION

Technologies to determine the temporal reference cell (for example, serving cell) in the wireless communication system described in this document. In an aspect, the UE may perform a search of the temporal reference cell based on the at least one synchronization signal generated based on an identifier (ID) of a cell. The UE may obtain received samples containing at least one signal si is chronic. UE can know the ID of the cell and may locally generate at least one synchronization signal. The UE may correlate the received samples, at least one locally generated synchronization signal in the time domain with different time offsets to obtain energy for multiple hypotheses temporal reference in the search box. The UE may then determine a temporal reference cell based on the energies for the multiple hypotheses temporal reference.

In one scheme, the UE may identify at least one detected peak based on the energies for the multiple hypotheses temporal reference. Each detected peak may correspond to a different hypothesis of temporal reference. UE can update the set of expected peaks on the basis of at least one detected peak. The UE may associate the at least one detected peak with the expected peaks and can update the signal strength and timing of each of the proposed peak based on the signal intensity and the temporal reference of the associated detected peak, if available. UE can add each detected peak, not associated with any of the alleged peaks, to the set of expected peaks. The UE can also remove the estimated peak from the set of expected peaks, if m is Nisha least one criterion is satisfied.

UE can identify the estimated peak intensity of the signal that exceeds the signal intensity of the tracked peak. The UE may provide a temporal reference identified the estimated peak as the temporal reference cell. The UE may update the temporal reference cell with a small temporary regulations, defined on the basis of contour tracking time. The UE may update the temporal reference cell with large adjustments timing defined based on the energies for the multiple hypotheses timing obtained from searches of temporal reference. The UE may update the placement of the search window every time temporal reference cell is updated with a larger regulation of temporal reference.

Hereinafter described in more detail various aspects and features of the invention.

BRIEF DESCRIPTION of DRAWINGS

Figure 1 illustrates a wireless communications system.

Figure 2 shows the transmission of primary and secondary synchronization signals.

Figure 3 shows the formation of a secondary synchronization signal for the cell.

Figure 4 shows the correlation with the secondary synchronization signal.

Figure 5 shows the accumulation of energy to get processed by the method of open energy.

6 shows processing in order to determine the refresh timing cell.

Fig.7 and 8 show the process for determining the temporal reference cell.

Fig.9 shows a device for determining the temporal reference cell.

Figure 10 illustrates a block diagram of the node B and UE.

11 illustrates a block diagram of the processor temporal reference in UE.

DETAILED description of the INVENTION

The technology described in this document can be used for various wireless communication systems such as CDMA, TDMA, FDMA, OFDMA, SC-FDMA and other systems. The terms "system" and "network" are often used interchangeably. A CDMA system may implement the wireless communication technology, as a universal terrestrial radio access (UTRA), cdma2000, etc. UTRA includes wideband CDMA (WCDMA) and other variants of CDMA. Cdma2000 covers standards IS-2000, IS-95 and is-856. TDMA system may implement such wireless communication technology such as global system for mobile communications (GSM). OFDMA system may implement the wireless communication technology, as the enhanced UTRA (E-UTRA), ultra-wideband transmission for mobile devices (UMB), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDM®, etc. UTRA and E-UTRA are part of the universal mobile communication system (UMTS). Standard long term evolution (LTE) 3GPP is planning to release a version of UMTS that uses E-UTRA, which employs OFDMA in downlink and SC-FDMA in uplink communication. UTRA, E-UTRA, UMTS, LTE GSM are described in documents from an organization called Partnership project third generation (3GPP). Cdma2000 and UMB are described in documents from an organization called Partnership project third generation 2 (3GPP2). For simplicity, certain aspects of the technology described below for LTE, and LTE terminology is used in most parts of the following description.

Figure 1 shows a system 100 for wireless communication, which may be an LTE-a system. System 100 may include a certain number of nodes B and other network objects. For simplicity, only three nodes B 110a, 110b and 110c are shown in figure 1. The node B may be a fixed station that communicates with the UE, and may also be referred to as an enhanced node B (eNB), a base station, access point, etc. Each node B 110 provides coverage due to a particular geographical region 102. To increase system throughput, full coverage area of node B can be partitioned into multiple smaller areas, for example, three smaller areas 104a, 104b and 104c. Each smaller area may be served by the corresponding subsystem of the node b In 3GPP, the term "cell" may be referred to as the smallest coverage area of a node B and/or subsystem of the node B serving this coverage area. In 3GPP2, the term "sector" can be referred to as the smallest coverage area of a base station and/or base station subsystem serving this area p. the closure. For simplicity, the concept of cells from 3GPP is used in the description below.

In the example shown in figure 1, each node B 110 has three cells that cover different geographic areas. For simplicity, figure 1 shows cells that do not overlap each other. In practical deployment neighboring cells typically overlap at the boundaries, which helps to ensure that the UE may be within the coverage of one or more cells in any location as the UE moves through the system.

UE 120 may be distributed across the system, and each UE may be stationary or mobile. The UE may also be referred to as a mobile station, terminal, access terminal, a subscriber unit, a station, etc. UE may be a cellular telephone, personal digital appliance (PDA), wireless modem, wireless device, handheld device, portable computer, cordless phone, etc. UE may communicate with the node B through the downward communication and upward communication line. Downward communication line (or straight line) refers to the communication line from the node B to the UE, and the upward communication line (or reverse link) refers to the communication line from the UE to the node B.

In system 100, each node B 110 may periodically transmit a primary synchronization signal and secondary synchronization signal for each cell in the evil B. The primary synchronization signal may also be referred to as the primary sync channel (P-SCH). The secondary synchronization signal may also be referred to as the secondary sync channel (S-SCH). Primary and secondary synchronization signals may also be referred to under other names. The UE may use primary and secondary synchronization signals in order to detect cells, to determine the timing and frequency offset detected hundred, etc.

Figure 2 shows an exemplary transmission of primary and secondary synchronization signals for a single cell. Timeline transmission for the downlink may be partitioned into units radiokatu. Each radiocat may have a predetermined duration (for example, 10 milliseconds (MS)) and can be partitioned into 20 time quanta with indexes from 0 to 19. Each time quantum can cover a fixed or configurable number of symbol periods, for example, six or seven symbol periods. In the diagram shown in figure 2, the primary and secondary synchronization signals are sent in two symbol periods in each of the time quanta 0 and 10 of each radicata. In General, primary and secondary synchronization signals may be sent with any frequency, for example, any number of times in each radiokate. The secondary signal synchronizationof to be sent next (for example, immediately before or after) with the primary synchronization signal, so that the estimation of the channel can be extracted from the primary synchronization signal and used for coherent detection of the secondary synchronization signal.

Each cell may be assigned a cell ID that is unique among all cells within a certain range of this cell. This assignment scheme identifiers hundred can give the opportunity to each UE uniquely identify all cells detected by this UE, regardless of the location of the UE. The system may support a set of cells IDs. Each cell can be assigned a specific cell identity from a set of cells IDs supported by the system.

In one scheme, the set of 504 unique cell IDs can be maintained through the system. 504 cell ID can be grouped into 168 unique groups of cells IDs, and each group of cells IDs can contain three unique cell ID. Grouping can be done so that every cell identity include only one group of cells IDs. The cell identity can be expressed as follows:

CID=3·GID+NIDequation (1),

where CID {0,..., 503} is the ID of the cell,

GID{0,..., 167} is the index of the group of cells IDs, which belongs to the cell identity,

and NID{0, 1, 2} is the index of a specific identifier within the group of cells IDs.

In the scheme shown in equation (1), the cell identity is uniquely defined (i) by the first number within the range of 0 to 167, representing the group of cells IDs, and (ii) the second number within the range from 0 to 2, representing the identity in the group of cells IDs. In General, any number of cells IDs can be maintained, the cells IDs can be grouped in any number of groups, and each group may include any number of cells IDs. For clarity, most of the following description is provided for the scheme described above, with only 504 IDs hundred, 168 groups of cells IDs and 3 cells IDs in each group.

Three main sequence synchronization codes (PSC) can be set to three possible values of NIDfor the three cells IDs in each group. In addition, 168 sequence of secondary synchronization codes (SSC) can be specified for 168 possible values of GIDfor 168 possible group ID is in the hundreds. The PSC and SSC sequences may be formed in different ways.

In one scheme the PSC sequence may be generated based on the sequence Sadova-Chu as follows:

equation (2),

whereuis the index of the root is defined by NIDand

dPSC(n) is the PSC sequence, and n is the index of the character.

Various PSC sequence can be formed with different indexesufor the sequence Sadova-Chu, anduis defined by NID. For example,ucan be equal to 25, 29 and 34 for NID0, 1, and 2, respectively. In the scheme shown in equation (2), the PSC sequence includes only part of the NID(and does not include the part of GID) cell ID.

In one scheme SSC-sequence may be generated based on a sequence of a maximum length of (M-sequence) as follows:

equation (3a),
equation (3b),

g is e s 0(n) and s1(n) are the two cyclic shifts of the M-sequence and are based on GID,

c0(n) and c1(n) are two sequences designed based on the NID,

z0(n) and z1(n) are the two scrambling sequences based on GID,

and dSSC(n) is the SSC sequence.

In the diagram shown in the set of equations (3), two cyclic shift of the M-sequence and alternating scrambling to form SSC sequence. SSC sequence for time quantum is 0 excellent form from SSC sequences for time quantum is 10. Various SSC sequences may be generated with different cyclic shifts of the M-sequence, where cyclic shifts are determined by GID. SSC sequences may also be scrambled with different scrambling sequences based on the NID. In the diagram shown in the set of equations (3), SSC sequence includes parts of GIDand NIDcell ID and thus is unique for each cell detected by the UE.

The formation of PSC and SSC sequences in LTE are described in the document 3GPP TS 36.211, entitled "EXT the config universal terrestrial radio access; Physical channels and modulation (Release 8)" ("Evolved Universal Terrestrial Radio Access (E-UTRA); Physical Channels and Modulation (Release 8)"), which is freely available. The PSC and SSC sequences may also be formed in other ways.

LTE uses multiplexing orthogonal frequency division multiplexing (OFDM) in the downlink. OFDM will partition the system bandwidth into multiple (K) orthogonal subcarriers, which are also generally referred to as tones, elementary signals, etc. Each subcarriers may be modulated with data. The spacing between adjacent subcarriers may be fixed, and the total number of subcarriers (K) may depend on the bandwidth of the system. For example, K may be equal to 128, 256, 512, 1024 or 2048 for bandwidth system 1,25, 2,5, 5, 10 or 20 MHz, respectively.

Figure 3 shows a scheme of the formation of the secondary synchronization signal for the cell for a time quantum is 0. Two cyclic shift of the M-sequence s0(n) and s1(n) can be formed on the basis of GIDcell ID and may be interspersed. Two scrambling sequence c0(n) and c1(n) can be formed on the basis of NIDcell ID and can be premiani. The scrambling sequence z0(n) may be formed on the basis of GIDcell ID and perenesena sequence of all units. SSC-sequence of dSSC(n) can be formed by multiplying perenesennyj sequences s0(n) and s1(n), perenesennyj sequence scrambling c0(n) and c1(n) and peremeshennoi sequence scrambling z0(n) on a per-symbol basis.

To form the OFDM symbol for the secondary synchronization signal, 62 symbol for SSC sequences may be displayed in 62 subcarriers with indices k0-k61used for transmission of the secondary synchronization signal. Null characters with zero values of the signal and/or other symbols can be displayed in the remaining subcarriers not used for the secondary synchronization signal. Only K symbols for all K subcarriers can be converted using a K-point inverse fast Fourier transform (IFFT)to obtain the useful part containing K samples in the time domain. The last C samples of the useful part can be copied and added to the beginning of the useful portion to form an OFDM symbol containing K+C samples. The copied part is usually referred to as a cyclic prefix and is used to resist the intersymbol interference (ISI)caused by frequency-selective fading. C is the length of cyclic prefix, and it can viberates is based on the expected delay spread in the system. LTE supports normal cyclic prefix with a nominal value of C and the extended cyclic prefix with larger value C. the Time quantum can include seven symbol periods for a normal cyclic prefix or six symbol periods for an extended cyclic prefix. OFDM symbol containing the secondary synchronization signal may be sent in one symbol period time quantum.

The UE may perform a search for cells on the basis of primary and secondary synchronization signals transmitted by these cells. Search hundreds UE can first locate the main synchronization signals from cells. The UE may receive NIDand symbol timing for each cell with a detected primary synchronization signal. The UE may then detect the secondary synchronization signal from each detected cell. UE can obtain GIDand human temporal reference for each cell using the detected secondary synchronization signal.

UE can operate in a connected mode and may communicate with the serving cell. This serving cell may be the hundredth best or good quality of the received signal at the UE. In the connected mode UE can monitor a temporal reference serving cell using contour tracking time (TTL). This outline from which legiunea time may periodically evaluate temporal reference signal (for example, primary and/or secondary synchronization signal)received from the serving cell, and may update a temporal reference serving cell based on the estimated timing of the received signal. The UE may receive a stream of received samples. Timing circuit time tracking can be used to place the FFT window, which selects which of the K received samples should be used in each period of the symbol.

Contour tracking time can update a temporal reference serving cell in accordance with the filter circuit, which provides the averaging potentially noisy estimates of the temporal reference from the received signal. Contour tracking time, thus, may be unable to respond to rapid changes in the temporary binding of the serving cell.

In an aspect, the UE may perform a search of the temporal reference serving cell based on the secondary synchronization signal, which may be formed on the basis of both the GIDso NIDcell ID and thus may be unique to the serving cell. UE can know GIDand NIDserving cell and then can locally generate a secondary synchronization signal. The UE may correlate the received samples with the locally generated secondary signal is scrap synchronization in the time domain with different time offsets, to detect the peaks of sufficient intensity. The UE may then determine a temporal reference serving cell based on the detected peaks.

Figure 4 shows the pattern correlation with the secondary synchronization signal to search for temporal reference. Accept sample time domain in the UE shown in the upper part of figure 4. Locally generated secondary synchronization signal is shown below accept samples offsetxfrom the reference temporal reference. Correlation can be performed for a set of hypotheses temporary binding, with each hypothesis temporal reference corresponds to a different potential temporary binding for the serving cell. Each hypothesis temporal reference can be set by means of different time offset from the reference timing, as shown in figure 4 and Pets in the following description. The hypothesis of temporal reference can also be specified by absolute time.

The received samples can be correlated with a locally generated secondary synchronization signal as follows:

equation (4),

where r(i) denotes a received sample, and i is approximate the index in the time domain,

s(i) denotes the locally generated secondary synchronization signal,

E(x) denotes the energy for the hypothesis of temporal referencex,

and "*" denotes the complex conjugate of a number.

The received samples can be correlated with a locally generated secondary synchronization signal for the various hypotheses temporal reference in the search box. This search box can cover the range from-W sampling periods to the left from the reference timing to +W sampling periods to the right from the reference temporal reference. In one scheme, the search window may cover the range from-1/2 the length of the cyclic prefix to +1/2 the length of the cyclic prefix. The hypothesis of temporal reference can be posted on one sampling period or at any other value. The energy received for each hypothesis, the temporal reference, may indicate the energy of the received signal for one or more of the transmission paths of signals with delay spread corresponding to this hypothesis, the temporal reference. Energy for various hypotheses temporal reference may be plotted on a graph in a time-dependent, as shown in the lower part of figure 4. The leftmost energy can be for the first tract income (FAP), which may correspond to a path in the zone of direct visibility from the serving cell to the UE.

In one scheme of energy for various hypotheses temporal reference can be used directly as the intensity of the signal peaks. Each peak can be formed by one or more of the transmission paths of signals with a specific delay spread. Each peak can be specified by (i) signal intensity determined by the energy of the tract(s) of transmission signals that form this peak, and (ii) timing corresponding to the delay spread is out of the tract(s) of transmission signals, forming a peak. In this scheme, the energy for each hypothesis, the temporal reference obtained from the correlation, can be used directly as a signal intensity of the peak for this hypothesis, the temporal reference.

In another scheme, the energy for the various hypotheses temporal reference can accumulate within Windows accumulation size U. Box accumulation can be placed in different initial positions, corresponding to different hypotheses temporal reference. Energy window savings can be accumulated for each source position to get processed by the method of open energy for the corresponding hypothesis of temporal reference. Processed by the method of open energy can be referred to as the accumulated energy and can be used as the signal intensity of the peaks.

Figure 5 shows the accumulation of energies for different hypotheses timing to get processed by the method of open energy. The set of energies can be obtained for a range of hypotheses temporal reference of the correlation, as described above for figure 4. The accumulation window size U can be accommodated, since the time zone offset ofyfrom the reference temporal reference. Energy window savings can accumulate to get processed by the method of open energy for the hypothesis of temporal referencey.

Box accumulation may shift over the range of time offsets, for example, from-W to +W sampling periods. Processed by the method of open energy can be calculated for each time offset, and can serve as a sign of the total energy of the received signal for all of the transmission paths of signals with delays in distribution, are accumulated. Processed by the method of open energy for various hypotheses temporal reference may be plotted on a graph in a time-dependent, as shown in the lower part of figure 5.

The energy accumulation can be performed in different ways. In one scheme, all the energy in the window savings can accumulate to get processed by the method of open energy. In another scheme, the only energy that exceeds the threshold SSELselection can be accumulated in order to get processed by the method of open energy. The threshold value can be set so that the accumulated only energy transmission path signals with sufficient intensity. In another scheme can accumulate a predetermined number of highest energy in the accumulation window. Energy storage can also be performed in other ways.

The UE may obtain a set of signal intensities for a set of peaks for different hypotheses temporal reference of the correlation and is aquaplane energy (if performed). Signal intensity of each peak can be equal to (i) energy for the corresponding hypotheses temporal reference, as shown in figure 4, or (ii) treated by the method of open energy window of accumulation placed in this hypothesis, the temporal reference, as shown in figure 5. The UE may also store energy or processed by the method of open energy for each hypothesis, the temporal reference in NACCsearches temporal reference, to obtain the intensity of the signal peak for this hypothesis, the temporal reference, where NACCmay be one or more.

In one scheme, the UE may compare the signal intensity of each peak to a threshold detection. The UE may store each peak with signal intensity above the threshold of detection, and may discard the remaining peaks. In another scheme, the UE may store a predetermined number of intensity peaks with the highest intensities of the signal and may discard the remaining peaks. For both schemes the stored peaks may be referred to as peaks. The UE may receive L detected peaks with the intensity of the signal S1-SLfor hypotheses temporal reference T1-TLrespectively, where L may be one or more. The intensity of the signal Slfor the l-th detected peak, where l=1,..., L, can be equal to ene the GII for the hypothesis of temporal reference T l(as shown in figure 4) or processed by the method of open energy for the hypothesis of temporal reference Tl(as shown in figure 5). L detected peaks can be ordered by the intensity of its signal so that S1≥S2≥...≥SL.

The UE may periodically perform a search for temporal reference (for example, every TSEARCHseconds), and can obtain a set of detected peaks from each search temporal reference. UE can filter the search results from different search temporal reference, in order to improve the accuracy of the measurement. The UE may perform filtering in different ways.

In one scheme, the UE may store the estimated set containing peaks that have been previously detected by the UE. Peaks in the expected set may be referred to as the estimated peaks. Each prospective peak may correspond to different potential temporary binding for the serving cell. The proposed set can be initialized with the detected peaks from the first search timing and the intensity of the signal and the temporal reference of each detected peak can be recorded. The intensity of the signal and the temporal reference of the alleged peaks after that you can be updated with the intensity of the signal and the time reference of the detected peaks. Intense peaks can also add who take place to an alleged set and weak alleged peaks can be removed from the proposed set.

At the beginning of the search estimated temporal reference set may contain M alleged peaks, where M may be one or more. Each prospective peak can be associated with a specific signal intensity and a specific time constraint. The UE may search for temporal reference and get L detected peaks with the intensity of the signal S1-SLand time constraint T1-TL. The UE may associate or map L detected peaks from a search temporal reference with M estimated peaks in the expected set. In one scheme, the detected peak may be associated with the anticipated peak, if the difference in timing between the two peaks is less than a predetermined interval ∆T time. The intensity of the signal and the temporal reference of the proposed peak can be filtered by using the signal intensity and the temporal reference of the associated detected peak, to obtain the updated signal strength and timing for the proposed peak.

In one scheme, the temporal reference of the proposed peak and the temporal reference of the associated detected peak can be filtered based on the filter with infinite impulse response (IIR as follows:

equation (5),

where Tavg,m(v) is the time constraint m-th estimated peak after v-th search timing

Tl(v) is the time constraint l-th detected peak associated with the m th prospective peak, and

αTis a coefficient that determines the amount of filtering.

In one scheme, the intensity of the signal estimated peak and the intensity of the signal of the associated detected peak can be filtered based on IIR filter as follows:

equation (6),

where Savg,m(v) is the intensity of the signal of m-th estimated peak

Sl(v)is the intensity of the signal l-th detected peak, and

αSis a coefficient that determines the amount of filtering.

In equations (5) and (6) large values of αSand αTcorrespond to a larger value of the filter, and Vice versa. αSmay be equal or not equal αTdepending on the desired magnitude of the average signal intensity and the temporal reference. Phi is trace can also be performed based on the filter with finite impulse response (FIR) or some other type of filter.

The detected peak may be within ∆T multiple alleged peaks. In this case, the detected peak may be associated with the nearest anticipated peak or the most intense peak of all estimated peaks within ∆T detected peak or some other prospective peak. The detected peak may not be within ∆T of any alleged peak. In this case, the detected peak may be added to the estimated set.

The estimated peak can be removed from the proposed set if one or more criteria are satisfied. In one scheme the estimated peak can be deleted if its signal strength is below the threshold drop within a predetermined time interval (for example, TDROPseconds). The timer can be maintained for estimated peak with a signal intensity below a threshold drop. The timer can be started when the signal strength falls below a threshold drop. The estimated peak can be removed from the proposed set when the timer expires, which may indicate that the intensity of the signal peak is below the threshold drop for TDROPseconds. The estimated peak can also be removed on the basis of other criteria.

6 in which it shows a processing circuit, to determine and update a temporal reference serving cell. The UE may search for temporal reference and can get new search results containing L detected peaks with the intensity of the signal S1-SLand time constraint T1-TL, respectively. L detected peaks can be sorted from the most intense to the most weak.

UE can be associated L detected peaks from a search temporal reference with M estimated peaks in the expected set. The UE may filter the signal strength and timing of each estimated peak intensity of the signal and the time constraint of the associated detected peak, if there is, for example, as shown in equations (5) and (6). The UE may add the detected peak to the intended set, if not anticipated peaks within ∆T detected peak. The UE may also update the timer for each candidate peak with a signal intensity below a threshold drop. After the update is complete, the UE may receive M estimated peak intensity of the signal Savg 1-Savg,Mthat time constraint Tavg 1-Tavg,Mand values of timer Q1-QM. The timer value for each candidate peak may transfer the amount of time during which interest is the intensity of the signal for this peak is below the threshold drop. The UE may remove the estimated peak when the timer for this peak expires.

Contour tracking time can continuously track the timing of the peak in the active set, which may be referred to as the tracked peak. Initially, the most intense peak in the expected set can be selected as the monitored peak and can fit in the active set. Tracked peak may be included or not included in the proposed set. Every time the monitored peak is replaced by the anticipated peak, temporal reference of this supposed peak can be used as a reference timing for searches temporal reference. The search window to search for temporal reference can be placed on the basis of the reference temporal reference, for example, as shown in figure 4. Contour tracking time can update timing of the tracked peak through a small temporary regulations in each renewal period. Small temporary regulation can be limited to be within a range of values, for example, in the range from-TNOMto +TNOMthe current temporal reference of the tracked peak.

The proposed set can be updated after each search the temporal reference (or every NCsearches the temporary attachment is key) based on the search results. Tracked peak can then be updated based on the estimated peaks. In one scheme, if the estimated peak corresponding to the tracked peak, has a higher signal intensity than the intensity of the tracked peak, the tracked peak can be replaced by this supposed peak. The estimated peak corresponding to the tracked peak, can be estimated by the peak closest to the tracked peak, the anticipated peak within a predetermined time interval of the tracked peak, etc. In another schema, if the signal intensity of the most intense estimated peak exceeds the intensity of the signal tracked maximum (for example, to a predetermined value of SREPLACE), the tracked peak can be replaced by the most intense alleged peak. For both schemes monitored peak can be replaced every time the best estimated peak available, or can be replaced only if the intensity of the signal tracked maximum below the threshold value replacement. Tracked peak can also be replaced by the estimated peak in other ways.

Contour tracking time can update a temporary binding monitored by a large peak of regulation time privatc is, when the tracked peak is replaced by the selected estimated peak. Great regulation of the temporal reference may be outside the range from-TNOMto +TNOM. The temporal reference of the selected estimated peak can be used as a new reference temporal reference for the search box that can be placed on a new reference time reference. The temporary binding of other alleged peaks may also be updated based on the temporal reference of the selected estimated peak. For example, if the preceding reference time constraint is TREF1and the temporal reference of the selected estimated peak is Tavg sthe new reference temporal reference can be specified asand the temporal reference of each of the remaining estimated peak can be updated as.

The table lists the various parameters that can be used to perform the search for temporal reference and update a temporal reference cell. Each parameter in table 1 may have a fixed or configurable value that may be chosen to provide good performance. For example, the search period may be configurable value between 10-20 MS or some other EIT is the group.

The parameterSymbolDescription
The search periodTSEARCHThe time interval between the search for temporal reference.
The interval combiningNCThe number of searches temporal reference, which combine energy before updating the estimated set.
Window length accumulationUWindow length accumulation, during which the energy store to get processed by the method of open energy.
Threshold selectionSSELThe threshold value in order to determine which energy must be collected to get processed by the method of open energy.
Threshold detectionSDETThe threshold value in order to identify peaks from a search temporal reference.
Threshold value and is solirovanie ∆TThe time interval used to associate the detected peak with the expected peak.
The coefficient for the intensity of the signalαSDetermines the amount of averaging for signal intensity of the proposed peak.
The coefficient for the intensity of the signalαTDetermines the amount of averaging for the intensity of the proposed peak.
The threshold value replacementSREPLACEThe threshold for replacement of the tracked peak at the expected peak.
The threshold value addSADDThe threshold for adding the detected peak to the intended set.
Threshold dropSDROPThe threshold for removal of the peak are expected to be set.
The timer drop operationTDROPThe timer value for which the pressure peak is expected to be set.

The technology described in this document can be used to determine temporal reference serving cell, a cell identity which is known to the UE. Technology can also be used to determine temporal reference other cells, the cells IDs are known to the UE. The UE may generate one or more synchronization signal for the cell based on the known cell ID) based positioning. The UE may then perform a correlation with a locally generated signal(s) synchronization to determine temporal reference cell. The UE may perform a search of temporal reference in connected mode, standby mode, etc

7 shows a diagram of a process 700 for determining the temporal reference cell. Process 700 may be performed by a UE (as described below) or by some other object. The UE may obtain received samples containing at least one synchronization signal generated based on the cell ID, for example serving cell (step 712). The UE may correlate the received samples, at least one synchronization signal to obtain energy for multiple hypotheses temporal reference in the search window (step 714). The UE may then determine a temporal reference cell based on the energies for the multiple hypotheses temporarily the binding (step 716).

The cell ID may contain the first part of GIDfor a group of cells IDs and the second part of the NIDfor ID within the group of cells IDs. At least one synchronization signal may contain a secondary synchronization signal generated based on the first and second parts of the cell ID. In one scheme stage 714 UE may generate a secondary synchronization signal based on the first and second parts of the cell ID. The UE may then correlate the received sample in the time domain with a secondary synchronization signal with different time offsets to obtain energy for multiple hypotheses temporal reference. In another scheme, at least one synchronization signal may further comprise a primary synchronization signal generated based on the second part of the cell ID. The UE may correlate the received sample in the time domain with the primary and secondary synchronization signals with different time offsets to obtain energy for multiple hypotheses temporal reference.

Fig shows the process for determining the temporal reference cell that is one scheme of step 716 7. UE can identify at least one detected peak based on the energies for the multiple hypotheses BP is variable bindings, each detected peak corresponds to a different hypotheses temporal reference (step 812). In one scheme, the UE may compare the energy for each hypothesis, the temporal reference threshold value detection. The UE may declare the detected peak for each hypothesis, the temporal reference with energies above the threshold of detection. In another scheme, the UE can accumulate energy in the accumulation window with different time offsets to obtain processed by the method of open energy for multiple hypotheses temporal reference. The UE may compare the processed method of window energy for each hypothesis, the temporal reference threshold value detection. The UE may then declare the detected peak for each hypothesis, the temporal reference with the processed method of window energy above the threshold of detection.

The UE may update the assumed set of peaks based on the at least one detected peak (step 814). In one scheme, the UE may associate the at least one detected peak with the expected peaks. The detected peak may be associated with the anticipated peak at a predetermined interval temporal reference of the detected peak, if such estimated peak is present. The detected peak may not be associated with any prospective p is com, if there is no anticipated peaks in a predetermined interval temporal reference of the detected peak. At least one detected peak may also be associated with the alleged peaks in other ways.

In one scheme, the UE may update the signal strength and timing of each of the proposed peak based on the signal intensity and the temporal reference of the associated detected peak, if available. UE can filter a temporal reference for each candidate peak with the temporal reference of the associated detected peak, for example, on the basis of the first IIR filter, as shown in equation (5). UE can filter the intensity of the signal for each candidate peak with signal intensity of the associated detected peak, for example, on the basis of the second IIR filter, as shown in equation (6).

UE can add each detected peak, not associated with any of the alleged peaks, to the set of expected peaks. The UE may also delete every single peak with a signal intensity below a threshold drop within a predetermined period of time from a set of expected peaks. UE can initialize a set of expected peaks, at least one detected peak, if the set is empty.

U can identify the estimated peak intensity of the signal, exceeding the intensity of the signal tracked maximum (step 816). The UE may provide a temporal reference identified the estimated peak as the temporal reference cell (step 818). The UE may update the temporal reference cell with a small temporary regulations, defined on the basis of contour tracking time (step 820). The UE may update the temporal reference cell with large adjustments timing defined based on the energies for the multiple hypotheses temporal reference obtained from searches of the temporal reference (step 822). Small regulatory temporal reference can be in a predetermined range of values, and large control the temporal reference can be outside a predetermined range of values. The UE may update the placement of the search window every time temporal reference cell is updated with a larger regulation of temporal reference (step 824).

Fig.9 shows the diagram of the device 900 to determine the temporal reference cell. The device 900 includes a module 912 to obtain received samples containing at least one synchronization signal generated based on a cell ID, a module 914 to correlate the received samples, at least one synchronization signal (for example, in the time domain), h is ordinary to obtain energy for multiple hypotheses temporal reference in the search box, and a module 916 to determine temporal reference cell based on the energies for the multiple hypotheses temporal reference. Modules figure 9 can contain processors, electronics devices, hardware devices, electronics components, logical circuits, storage devices, etc. or any combination of the above.

Figure 10 shows the block diagram of the schema node 110 and UE 120, which may be one of the nodes In one of the UE in figure 1. In this scheme, the node 110 is equipped with NTantennas 1034a-1034nt, and UE 120 is equipped with NRantennas a-1052nr, where in General NT≥1 and NR≥1.

At node B 110, the transmitting processor 1020 may receive data for one or more UES from a data source 1012, process the data for each UE based on one or more modulation and coding selected for that UE, and provide data symbols for all UES. Transmit processor 1020 may also form the primary and secondary synchronization signals for each cell and may provide symbols for synchronization signals for all cells in the node B 110. Transmit processor 1020 may also process service signals/control information and provide the service symbols. Transmit (TX) processor 1030 with many inputs and many outputs (MIMO) may multiplex the data symbols, the symbols for synchronization signals, utility IC is s and perhaps other characters. TX MIMO processor 1030 may perform spatial processing (for example, pre-coding) for multiplexed symbols, if applicable, and provide NToutput streams of symbols in NTmodulators (MOD) 1032a-1032nt. Each modulator 1032 can handle a corresponding output stream of characters (for example, for OFDM)to obtain output samples. Each modulator 1032 additionally can handle (for example, convert to analog form, amplify, filter, and transform with increasing frequency) the output stream of samples to obtain a signal of the downlink. Signals downlink from the NTmodulators 1032a-1032nt can be transmitted through the NTantennas 1034a-1034nt, respectively.

At UE 120 antenna 1052a-1052nr can receive signals downlink from the node B 110 and may provide received signals to demodulators (DEMOD) 1054a-1054nr, respectively. Each demodulator 1054 may lead to the required parameters (for example, to filter, amplify, convert, with decreasing frequency, and digitize) the corresponding received signal to obtain received samples. Each demodulator 1054 may further process the received samples (for example, for OFDM)to obtain received symbols. MIMO detector 1056 mo is et to obtain received symbols from all N Rdemodulators 1054a-1054nr, perform MIMO detection on the received symbols, if applicable, and provide detected symbols. The receiving processor 1058 can handle (for example, to demodulate, reverse alternation and decode) the detected symbols and provide decoded data for UE 120 to the receiver 1060 data. In General, processed by a MIMO detector 1056 and the receiving processor 1058 complementary to the processing by TX MIMO processor 1030 and the transmit processor 1020 in the node B 110.

In uplink communication, at UE 120, data from a source 1062 data and signaling from a controller/processor 1080 can be processed by a transmit processor 1064, pre-coded by a TX MIMO processor 1066, if applicable, given to the appropriate settings through modulators 1054a-1054nr and transmitted to the node B 110. At node B 110, the uplink signals from UE 120 may be received by antennas 1034, is given to the appropriate settings through demodulators 1032, processed by a MIMO detector 1036, if applicable, and further processed by the receiving processor 1038 to receive data and signaling to be sent by UE 120.

The controller/processor 1040 and 1080 may direct the operation at the node B 110 and UE 120, respectively. USB circuits the p/processor 1080 may exercise or direct the process 700 7, the process 716 on Fig and/or other processes for the techniques described in this document. Storage device 1042 and 1082 may store data and program codes for node B 110 and UE 120, respectively. The scheduler 1044 may dispetceratul UE for transmission on the downlink and/or uplink communication and can provide resource assignments for DispatcherTimer UE. The processor 1070 temporal reference cell in the UE 120 may perform a search for temporal reference, update the estimated set, select the tracked peak, update temporal reference serving cell, etc. the Processor 1070 can perform all of the processing shown in Fig.6-8.

11 shows a block diagram of the schema processor 1070 temporal reference cell in the UE 120 figure 10. For simplicity, 11 shows processing for sampling the time domain from one antenna. The processor 1070 filter 1112 can get a sample of the time domain to the frequency of sampling and can filter these samples to send primary and secondary synchronization signals. Filter 1112 can also thin out the filtered sample from the sampling frequency to a lower frequency. The sampling frequency may depend on the bandwidth of the system. A lower rate may depend on the bandwidth of the synchronization signals and can be 1,92 megavision per second (Msp) or any other frequency.

Driver 1114 synchronization signals can generate a secondary synchronization signal and, possibly, the primary synchronization signal based on the cell ID of a serving cell. The correlator 1116 may correlate the received samples with the primary and/or secondary synchronization signal and can provide energy for various hypotheses temporal reference in the search box. The received samples can be samples from filter 1112 (as shown in figure 11), the samples provided in the processor 1070 (not shown figure 11), or some other samples. A peak detector 1118 can detect peaks based on the energies for the various hypotheses temporal reference and can provide L detected peaks. Module 1120 may update the set of expected peaks on the basis of L detected peaks as described above. Module 1120 may also determine whether it is better estimated peak than the tracked peak, through circuit 1122 track of time. If the best estimated peak available, the module 1120 may provide the prospective peak in the circuit 1122 track of time. Module 1120 may also provide a temporal reference of this supposed peak in the correlator 1116, which can host the search box on the basis of the temporal reference of this supposed peak. The circuit 1122 tracking time from legimate timing of the peak, provided by module 1120, up until this peak is not replaced by another prospective peak. The circuit 1122 time tracking can provide a temporal reference serving cell.

Experts in the art should understand that information and signals may be represented using any of a variety of different technologies. For example, data, instructions, commands, information, signals, bits, symbols, and elementary signals, which may be cited as examples throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination of the above.

Specialists in the art will additionally must take into account that the various illustrative logical blocks, modules, circuits, and steps of the algorithm described in connection with the disclosure may be implemented as electronic hardware, computer software, or combinations thereof. To clearly illustrate this interchangeability of hardware and software, various illustrative components, blocks, modules, circuits, and steps described above, in General, on the basis of functionality. Implemented this functionality as hardware or the TS software depends on the specific application and the structural constraints imposed on the system as a whole. Highly qualified specialists can implement the described functionality in varying ways for each particular application, but such solutions should not be interpreted as being a departure from the scope of the present disclosure.

The various illustrative logical blocks, modules, and circuits described in connection with the disclosure herein may be implemented or performed using a General-purpose processor, digital signal processor (DSP), a specialized integrated circuit (ASIC), programmable by the user matrix BIS (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination of the above, designed to perform as described in this document functions. The General-purpose processor may be a microprocessor, but in an alternative embodiment, the processor may be any conventional processor, controller, microcontroller, or state machine. The processor may also be implemented as a combination of computing devices, for example, the combination of a DSP and a microprocessor, the number is about microprocessors, one or more microprocessors with a DSP core, or any other such configuration.

The stages of a method or algorithm described in connection with the disclosure herein, can be implemented directly in hardware, in a software module, executable by a processor, or combinations of the above. A software module may be posted permanently in memory type RAM, flash memory, memory type ROM memory, EPROM, EEPROM memory, registers, hard disk, removable disk, CD-ROM, or any other form of media data storage known in the art. Typical media storage connected to the processor, and the processor can read information from and write information to the media storage. In an alternative embodiment, the media storage can be built into the processor. The processor and the media storage data can be placed in the ASIC. ASIC may be posted permanently in the user terminal. In an alternative embodiment, the processor and the media storage data can be placed as discrete components in a user terminal.

In one or more exemplary circuits described functions may be implemented in hardware, software, firmware or any the th combination of the above. If implemented in software, the functions may be stored or transmitted as one or more instructions or code on a computer readable medium. Machine-readable media includes both computer storage media data, and the communication environment, including any medium that facilitates the movement of a computer program from one place to another. Media storage can be any available media that can be accessed by a General purpose computer or special purpose. As an example, and not limitation, these machine-readable media can include RAM, ROM, EEPROM, CD-ROM or other storage device for optical drives, storage on magnetic disks or other magnetic storage devices, or any other medium that can be used to carry or store desired program code means in the form of instructions or data structures and which can be accessed by a General purpose computer or special purpose or General purpose processor or special purpose. Also, any connection is properly termed a computer readable media. For example, if the software is transmitted from a web site, server, or other remote East is cnica with a coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared, radio, and microwave environment, coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, microwave, and environment, is included in the definition of the media. Disk (disk) and the disk (disc) when used in this document include compact disc (CD), laser disc, optical disc, digital versatile disk (DVD), floppy disk and Blu-Ray disc, and the drive (disk) usually reproduce data magnetically, while discs (disc) usually reproduce data optically with lasers. Combinations of the above should also include machine-readable media.

The foregoing description of the disclosure is provided to enable any person skilled in the art to make or use the disclosure. Various modifications in the disclosure should be obvious to a person skilled in the art, as described in this document, the General principles can be applied to other variations without departure from the essence and scope of the disclosure. Thus, the disclosure is not intended to be limited described in this document are examples and schemes, and should satisfy himself Shiro is th volume, consistent with the principles and new features disclosed in this document.

1. The method of determining the temporal reference cell containing phases in which:
- get accepted sample containing at least one synchronization signal generated based on the cell ID;
- correlate the received samples, at least one synchronization signal to obtain energy for multiple hypotheses temporal reference in the search window,;
determine a temporal reference cell based on the energies for the multiple hypotheses temporal reference; and
- update temporal reference cell using at least two regulations temporal reference.

2. The method according to claim 1, wherein the identifier of the cell contains the first part for a group of cells IDs and the second part of the ID is in the group of cells IDs and in which at least one synchronization signal contains a secondary synchronization signal generated based on the first and second parts of the cell ID.

3. The method according to claim 2, in which the correlation of the received samples includes the steps are:
- form a secondary synchronization signal based on the first and second parts of the cell ID and
- correlate the received sample in the time domain with a secondary synchronization signal with different the time offsets, to get energy for multiple hypotheses temporal reference.

4. The method according to claim 2, in which at least one synchronization signal further comprises a primary synchronization signal generated based on the second part of the cell ID.

5. The method according to claim 4, in which the correlation of the received samples includes the steps are:
- form the primary synchronization signal based on the second part of the cell ID,
- form a secondary synchronization signal based on the first and second parts of the cell ID and
- correlate the received sample in the time domain with the primary and secondary synchronization signals with different time offsets to obtain energy for multiple hypotheses temporal reference.

6. The method according to claim 1, wherein determining the temporal reference cell based on the energies for the multiple hypotheses temporal reference contains stages, which are:
- identify at least one detected peak based on the energies for the multiple hypotheses temporal reference, each detected peak corresponds to a different hypotheses temporal reference, and
determine a temporal reference cell based on the at least one detected peak.

7. The method according to claim 6, in which the identification of the at least one detected peak contains this is p, where:
- compare the energy for each hypothesis, the temporal reference threshold value detection and announce the detected peak for each hypothesis, the temporal reference with energies above the threshold of detection.

8. The method according to claim 6, in which the identification of the at least one detected peak contains stages, which are:
- accumulate energy in the window of accumulation at different time offsets to obtain processed by the method of open energy for multiple hypotheses timing
- compare processed by the method of open energy for each hypothesis, the temporal reference threshold value detection
- announce the detected peak for each hypothesis, the temporal reference with the processed method of window energy above the threshold of detection.

9. The method according to claim 6, in which determining the temporal reference cell based on the at least one detected peak contains the stage at which:
- update the set of expected peaks on the basis of at least one detected peak and determine the temporal reference cell on the basis of the set of expected peaks.

10. The method according to claim 9, in which the update of the set of expected peaks contains stages, which are:
- associate the at least one detected peak with the expected peaks
- update the signal strength and timing of each of the proposed peak based on the signal intensity and the temporal reference of the associated detected peak, if present, and
type each detected peak, not associated with any anticipated peak, to the set of expected peaks.

11. The method according to claim 10, in which the Association of at least one detected peak with the expected peaks contains, for each detected peak, the steps are:
- associated detected peak with the expected peak at a predetermined interval temporal reference of the detected peak, if the predicted peak is present, and
- not associated detected peak with any prospective peak, if not anticipated peaks in a predetermined interval temporal reference of the detected peak.

12. The method according to claim 10, in which the update signal intensity and the temporal reference for each candidate peak contains stages, which are:
- filtered temporal reference for each candidate peak with the temporal reference of the associated detected peak, if present, on the basis of the first filter and
- filter the signal intensity for each candidate peak with signal intensity of the associated detected peak, if present, the OS is ove second filter.

13. The method according to claim 9, in which the update of the set of expected peaks contains the stage at which remove every single peak with a signal intensity below a threshold drop within a predetermined time period from a set of expected peaks.

14. The method according to claim 9, in which the update of the set of expected peaks contains the stage at which initialize the set of expected peaks, at least one detected peak, if the set is empty.

15. The method according to claim 9, in which determining the temporal reference cell on the basis of the set of expected peaks contains stages, which are:
- identify the estimated peak intensity of the signal that exceeds the signal intensity of the tracked peak, and
- provide a temporal reference identified the estimated peak as the temporal reference cell.

16. The method according to claim 1, further comprising stages, which are:
- update temporal reference cell using a small temporary regulations binding, defined on the basis of contour tracking time, a small regulatory temporal reference are within a predetermined range of values; and
- update temporal reference cell with large adjustments timing defined based on the energies for the set of the different hypotheses timing obtained from searches of the temporary binding, large regulation of temporal reference are outside a predetermined range of values.

17. The method according to item 16, further containing a stage, on which:
- update the placement of the search window every time temporal reference cell update with the help of a large regulatory temporal reference.

18. Device for determination of the temporal reference cell containing:
at least one processor is configured to receive the received sample containing at least one synchronization signal generated based on the cell ID, to correlate the received samples, at least one synchronization signal to obtain energy for multiple hypotheses temporal reference in the search window to determine a temporal reference cell based on the energies for the multiple hypotheses temporal reference, and update the temporal reference cell using at least two regulations temporal reference.

19. The device according to p, in which the at least one processor is configured to generate a secondary synchronization signal based on the cell ID and to correlate the received sample in the time domain with a secondary synchronization signal at different time offsets to obtain the energy e is I multiple hypotheses temporal reference.

20. The device according to p, in which the at least one processor is configured to identify at least one detected peak based on the energies for the multiple hypotheses temporal reference, each detected peak corresponds to a different hypotheses temporal reference, and to determine the temporal reference cell based on the at least one detected peak.

21. The device according to claim 20, in which the at least one processor is configured to update the set of expected peaks on the basis of at least one detected peak and to determine temporal reference cell on the basis of the set of expected peaks.

22. The device according to item 21, in which the at least one processor is configured to associate at least one detected peak with the expected peaks, update the signal strength and timing of each of the proposed peak based on the signal intensity and the temporal reference of the associated detected peak, if present, and add each detected peak, not associated with any of the alleged peaks, to the set of expected peaks.

23. The device according to item 21, in which the at least one processor is configured to identify the estimated peak intensity of the signal exceeding intens who want to make the signal tracked maximum, and to provide a temporal reference identified the estimated peak as the temporal reference cell.

24. The device according to p, in which the at least one processor is configured to update a temporal reference cell using a small temporary regulations binding, defined on the basis of contour tracking time, and update timing cells with large adjustments timing defined based on the energies for the multiple hypotheses temporal reference obtained from searches of the temporary binding, with little regulation of the temporal reference are within a predetermined range of values, and large control the temporal reference are outside a predetermined range of values.

25. Device for determination of the temporal reference cell containing:
means for receiving the received samples containing at least one synchronization signal generated based on the cell ID;
means to correlate the received samples with at least one synchronization signal to obtain energy for multiple hypotheses temporal reference in the search window,;
means for determining the temporal reference cell based on the energies for the multiple hypotheses temporal reference; and
- a means for the resolution temporal reference cell using, at least two regulations temporal reference.

26. The device according A.25, in which the means for correlating the received samples contains:
- means for forming a secondary synchronization signal based on the cell ID, and
means to correlate the received samples in the time domain with a secondary synchronization signal with different time offsets to obtain energy for multiple hypotheses temporal reference.

27. The device according A.25, in which the means for determining the temporal reference cell based on the energies for the multiple hypotheses temporal reference contains:
means for identifying at least one detected peak based on the energies for the multiple hypotheses temporal reference, each detected peak corresponds to a different hypotheses temporal reference, and
means for determining the temporal reference cell based on the at least one detected peak.

28. The device according to item 27 in which the means for determining the temporal reference cell based on the at least one detected peak contains:
means for updating the set of expected peaks on the basis of at least one detected peak, and
means for determining the temporal reference cell on the basis of the set of expected peaks.

<> 29. The device according to p, in which the means for updating the set of expected peaks contains:
means for associating at least one detected peak with the expected peaks,
means for updating the signal intensity and the temporal reference for each candidate peak based on the signal intensity and the temporal reference of the associated detected peak, if present, and
means for adding each detected peak is not associated with any anticipated peak, to the set of expected peaks.

30. The device according to p, in which the means for determining the temporal reference cell on the basis of the set of expected peaks contains:
means for identifying the estimated peak intensity of the signal that exceeds the signal intensity of the tracked peak, and
means for providing a temporal reference identified the estimated peak as the temporal reference cell.

31. The device according A.25, optionally containing:
means for updating the temporal reference cell using a small temporary regulations binding, defined on the basis of contour tracking time, with little regulation of the temporal reference are within a predetermined range of values; and
means for updating the temporarily is binding combs with large adjustments timing defined on the basis of the energies for the multiple hypotheses temporal reference obtained from searches of the temporary binding, with large regulating the temporal reference are outside a predetermined range of values.

32. Machine-readable media containing executable computer instructions to cause the computer to perform a method for determining the temporal reference cell, and the method comprises the steps are:
- get accepted sample containing at least one synchronization signal generated based on the cell ID,
- correlate the received samples, at least one synchronization signal to obtain energy for multiple hypotheses temporal reference in the search box,
determine a temporal reference cell based on the energies for the multiple hypotheses temporal reference, and
- update temporal reference cell using at least two regulations temporal reference.

33. Machine-readable media on p, and the method further comprises the steps are:
- identify at least one detected peak based on the energies for the multiple hypotheses temporal reference, each detected peak corresponds to a different hypotheses timing
- update the set of expected peaks on the basis, by at least one detected peak, and
determine a temporal reference cell on the basis of the set of expected peaks.

34. Machine-readable media on p, and the method further comprises the steps are:
- associate the at least one detected peak with the expected peaks,
- update the signal strength and timing of each of the proposed peak based on the signal intensity and the temporal reference of the associated detected peak, if present, and
type each detected peak, not associated with any of the alleged peaks, to the set of expected peaks.

35. Machine-readable media on p, and update the temporal reference cell using at least two temporary bindings contains:
- update the temporal reference cell using a small temporary regulations binding, defined on the basis of contour tracking time, with little regulation of the temporal reference are within a predetermined range of values, and
- update the temporal reference cell with large adjustments timing defined based on the energies for the multiple hypotheses temporal reference obtained from searches of the temporary binding, large regulation of temporal reference are outside a predetermined diapazonundan.



 

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FIELD: information technology.

SUBSTANCE: base station, which sends a synchronisation signal over a synchronisation channel using the system frequency band which is less than the maximum system frequency band, in a radio communication system which supports use of multiple frequency bands, has a multiplexing unit configured to multiplex the synchronisation channel and a channel other than the synchronisation channel, based on reception filter characteristic used in the mobile station. The multiplexing unit can accommodate the synchronisation channel and the channel other than the synchronisation channel at continuous subcarriers. In another version, the multiplexing unit can allocate a protective band or a cyclic prefix for the transition band of the reception filter.

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FIELD: communications engineering.

SUBSTANCE: proposed band selection method for mobile orthogonal frequency division multiple access communication system includes following steps to classify procedures of band selection between sending end and receiving ends with respect to original band selection process, passband width selection process, and periodic band selection process: determination of source band selection code (SC)number for source band selection process; SC number to request passband width for passband width request selection process and periodic SC number for periodic band selection process; determination of periodic SC deferment value in compliance with periodic SC number, and transmission of source SCs, passband width request SC, periodic SCs, and periodic SC deferment values on receiving ends.

EFFECT: minimized time for band selection access.

22 cl, 3 dwg, 4 tbl

FIELD: communications engineering.

SUBSTANCE: stationary wireless access system has, as a rule, user's room equipment unit connected through Ethernet interface to personal computer or to local network and base station unit connected through Ethernet interface to network. User's room equipment unit as such is easily installed by user while base station unit is usually mounted on mast at distance of 1 to 5 miles (1/6 to 8 km) from user's room equipment unit. Both the latter and base station unit usually incorporate integrated transceiver/data switch that provides for radio-frequency communications in the range of 2.5 to 2.686 GHz. Multiplexing with orthogonal frequency division of signals is used during transmission between user's room equipment units and base station ones over ascending and descending lines.

EFFECT: provision for using outwardly accessible antenna affording transmission within line-of-sight range.

70 cl, 19 dwg

FIELD: electrical and radio communications; underwater, radio, radio-relaying, and meteorological communication lines.

SUBSTANCE: start-stop communication system that has on sending end signal shaping and transfer unit 1 and on receiving end, receiver 2, amplitude detector 3, low-pass filter 4, first comparator 6, memory device 7, shift register 8, first decoder 9, switch 10, synchronizing unit 11, pulse shaper 12, pulse burst shaper 13, binary counters 14, 17, signal retrieval and storage device 19, and threshold device 5 is provided in addition with newly introduced second comparator 15, RS flip-flop 16, and second decoder 18.

EFFECT: reduced malfunction probability of proposed communication system.

1 cl, 3 dwg

FIELD: mobile telecommunication systems.

SUBSTANCE: device for decreasing relation of pike power to average power signal, sent along N(=2r) sub-bearing lines in transmitting device, having encoders for block encoding of w input data, where r - real number > 2, and output of N code symbols, has: serial-parallel converter for transforming data flow to w-(r-2) parallel data flows, where w - length of information word, first coder for receipt of w/2 parallel data flows from w-(r-2) parallel data flows from serial/parallel converter, block encoding of w/2 parallel data flows and output of N/2 first code symbols, generator of input operators for generation of r-2 data flows of input operators, in accordance to w-(r-2) parallel data flows, and second coder for receiving parallel data flows from serial/parallel converter, which were not received at first coder and (r-2) data flows from input operators, block encoding of received data flows and output of N/2 second code symbols, while r-2 data flows of input operators provide for complementarity of N code symbols.

EFFECT: higher efficiency, higher reliability.

6 cl, 22 dwg

FIELD: engineering of devices and methods for receipt and synchronization in direct digital satellite broadcast system.

SUBSTANCE: satellite system uses modulation with temporal signals separation and single-frequency network of ground-based re-emitting stations, each of which introduces a delay to ground signal. Delay allows to provide for coincidence of time of receipt of early modulated signal in the center of ground broadcasting zone with time of receipt of appropriate late modulated signal, thus improving switching between ground and satellite signals in receiver. Delay also compensates processing delay, occurring during conversion of satellite modulated stream under direct visibility conditions to multi-frequency modulated stream for transmission of satellite modulated stream under direct visibility conditions to user receivers. Delay is also adjusted in accordance to distance difference between each ground-based re-emitting station and satellite and between each station and center of ground-based broadcasting zone. Adjustment as described above optimizes receipt of temporal signals separation modulated and multi-frequency modulated signals by means of synchronization in the center of single-frequency system of phase of multi-frequency modulated signals, re-emitted from re-emitting stations of single-frequency system.

EFFECT: increased quality of radio-signal receipt.

8 cl, 12 dwg

FIELD: engineering of devices for generating series of preamble with low ratio of pike to average power in communications system with orthogonal multiplexing and frequency separation of channels.

SUBSTANCE: in accordance to method, first series of preamble is generated, wherein odd data of input series of preamble are transformed to zero data, and even data of aforementioned series are transformed to nonzero data, first series of preamble is transmitted through one of two antennas, second preamble series is generated, wherein even data of input series of preamble are transformed to zero data, and odd data of aforementioned series are transformed to nonzero data, second series of preamble is transmitted through another antenna.

EFFECT: increased efficiency.

6 cl, 10 dwg

FIELD: electric communications engineering, in particular, engineering of multichannel communication systems.

SUBSTANCE: system for transmitting discontinuous information contains at transmitting side information sources, multipliers, adder, clock generator, Walsh functions generator, 2n keys (where 2n - number of outputs of Walsh functions generator) and frequency splitter, two elements of one-sided conductivity and 2n additional multipliers, and on receiving side - clock generator, Walsh functions generator, multipliers, integrators, information receivers, 2n keys and frequency splitter, two elements of one-sided conductivity and 2n additional multipliers. As a new addition, on transmitting side two one-sided conductivity elements are inserted and 2n additional multipliers, and on receiving side - two one-sided conductivity elements and 2n additional multipliers.

EFFECT: decreased frequency band due to decreased effective width of channel carriers spectrum.

6 dwg, 1 tbl

FIELD: engineering of communication systems, using multi-access layout based on orthogonal multiplexing circuit with frequency division.

SUBSTANCE: communication system divides whole range of frequencies onto a set of sub-frequency ranges. Receiver of information about quality of channels receives information about quality of channels for each one of a set of frame cells, occupied during first time span by a set of frequency-time cells, occupied by second time span and a given number of sub-frequency ranges, transferred via check communication channel from receiver. Module for sorting frame cells analyzes information about quality of check communication channels and sorts frame cells in accordance to information about quality of channels. Module for assigning sub-channels, if transfer data exist, transfers data through a frame cell with best channel quality among other frame cells.

EFFECT: increased data transfer speed.

5 cl, 6 dwg

FIELD: electric radio engineering, possible use for increasing quality of electric communication, especially in multi-frequency wireless communication systems.

SUBSTANCE: method for decreasing ratio of peak signal power to its average ratio PAPR in multi-frequency communication systems, in which information symbol is formed by a set of signals, each one of which is centered on one of multiple bearing frequencies, is characterized by the fact that in transmitter a set of bearing frequencies is divided on several sections - subsets of bearing frequencies, information symbol, PAPR value of which does not exceed required threshold PAPR0, is transferred via all carriers, information symbol, value PAPR of which exceeds required threshold PAPR0 is divided on several sub-symbol sections, while number of these sections equals number of sub-carrier subsets, each section of symbol is transferred same as full symbol, wherein data are only transferred on one group of carriers, while other carriers are not modulated, in receiver, arrival of incomplete symbol is identified by analysis of amplitudes of carrier signals, which are not modulated in case of symbol division. Multi-frequency communication system is characterized by construction of receiver and transmitter, adapted for execution of operations, included in proposed method.

EFFECT: preservation of high channel capacity with simplified correction procedure.

2 cl, 12 dwg

FIELD: the invention refers to the field of radio technique and may be used for transmission of information with the aid of signals with orthogonal frequency multiplexing.

SUBSTANCE: the technical result is in increasing accuracy of synchronization of signals with orthogonal frequency multiplexing and that in its turn provides reduction of error possibility at reception of these signals even in such complex propagation conditions as shot-wave range channels. For this in the receiving set of the known equipment two memory blocks, two commutators, a maximum choice selection block, a meter and a time intervals calculation block are introduced.

EFFECT: increases accuracy of signals.

6 dwg

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