The way of forming words framing and validation of speech frame synchronization in a broadband communication system with code division multiplexing (smdr) and device for its implementation

 

The invention relates to a device and method for forming words frame synchronization in an asynchronous communication system with multiple access and code division multiplexing. In the apparatus for forming the word synchronization for synchronization of frames, each of which has a predetermined number of time intervals, each of the at least two generators of m-sequences forms a predetermined number of consecutive elements, and a selector multiplexes the sequential elements obtained from the generators of m-sequences, and distributes the multiplexed elements at time intervals. 9 C. and 8 C.p. f-crystals, 21 ill., table 2.

The technical field of the invention the Present invention generally relates to a device and method for forming words framing and validation of speech frame synchronization in a communication system with multiple access and code division multiplexing (mdcr, CDMA) and, in particular, to a device and method for forming words framing and validation of speech frame synchronization in an asynchronous communication system with broadband access and code razda measures, aimed at the integration of mobile communication systems around the world.

Especially quickly the process of negotiation of the North American CDMA 2000 communication system and the European system of communication SMDR. In this way increases the likelihood that in the communication system SMDR and asynchronous communication system mdcr (hereinafter referred to as CDMA 2000), which uses other frequencies the following basic assumptions (samples comprising 3,6864 million parcels per second (MP/s), as a rule, will be used the frequency of 3.84 MT/S. Consequently, it is necessary to change the system configuration SMDR so that she could work with a repetition rate of basic assumptions, reduced to the value equal to 15/16 (3,84 MP/s/4,096 MP/s) from the source repetition rate of basic assumptions, part of 4,096 MP/C. the Best option for the reconstruction of known systems SMDR without changing the structure of its time intervals (cycles) is to reduce the number of time intervals in the frame from 16 to 15 time slots per frame.

Changing the number of time slots per frame for the coordination of communication systems, CDMA 2000 and SMDR is performed by changing the pattern of the word synchronization pilot signal for use in the course of the generation) Radiocommunication standards SMDR for one of the leading communication technologies SMDR include checking framing with the use of the word synchronization. The word synchronization in the known techniques based on the assumption that one frame contains 16 time intervals. Currently developing a new version of the word synchronization suitable for structures containing 15 time slots per frame. When one frame consists of 15 time slots, the device forming words frame synchronization in a communication system SMDR must be modified. When a new frame structure known way to verify synchronization, based on the 16 time slots per frame, becomes for the system SMDR unusable. Therefore, it is necessary to develop a new way of checking synchronization, adapted to the changed structure with 15 time intervals per frame.

Summary of the invention the present invention is a device and method for forming pattern of the word synchronization in the communication system SMDR.

Another objective of the present invention is to provide a device and method for forming pattern of the word synchronization, adapted for operation in the structure of a frame containing the 2P-1 (where P is a positive integer) time slots per frame, in the communication system mdcr.

Another challenge facing us is the ides SMDR with the frame structure, contains 15 time slots per frame.

The next task of the present invention is to provide a device and method for forming words framing using m-sequences in the communication system SMDR with the structure of a frame containing the 15 time slots per frame.

Another object of the present invention is to provide a device and method for verifying synchronization by defining template word synchronization of the received pilot signals in the communication system SMDR, where one frame contains 15 time slots and where to check synchronization in each time interval is transmitted pilot signal in the form of an m-sequence.

These and other objectives can be achieved by providing a device for the formation of word synchronization for synchronization of frames, each of which has a predetermined number of time intervals. In the device forming words synchronization, each of at least two generators of m-sequences forms a predetermined number of consecutive elements, and a selector multiplexes the sequential elements taken from the generators of m-sequences, and rasped other purposes, the characteristics and advantages of the present invention will become more apparent from the following detailed description together with the accompanying drawings, in which: Fig. 1A, 1B and 1C is a conceptual view frame synchronization in a communication system SMDR; Fig. 2A-2D, the structure of time slots in each channel in the communication system SMDR; Fig. 3A-3H - structure of the pilot signal of each channel in the communication system SMDR; Fig.4A, 4B and 4C - structure of the word synchronization in the communication system SMDR; Fig. 5A-5D, the relationship between frame intervals, the pilot signals and the word synchronization in accordance with Fig. 1 through 4C;
Fig. 6 - structure of the word synchronization used in the communication system SMDR according to a variant of the present invention;
Fig.7 is a block diagram of a sequence of operations illustrating the procedure of forming the word synchronization according to a variant of the present invention;
Fig.8 is a graph showing the correlation characteristic of the word synchronization with the structure shown in Fig.6;
Fig. 9 is a block diagram of a transmission device in the communication system SMDR according to a variant of the present invention;
Fig. 10 is a block diagram of a receiving device in the communication system SMDR according to real option is 0;
Fig. 12 is another variation of the generator word synchronization in the receiver shown in Fig.10;
Fig. 13 is a third option generator word synchronization in the receiver shown in Fig.10;
Fig.14 - input generators of the word synchronization, shown in figures 11, 12 and 13;
Fig. 15 is a block diagram of the verifier synchronization frame in the receiving device shown in Fig.10;
Fig. 16A-17C - structure of the synchronization channel transmitted by the transmitting device;
Fig. 18 is an example of the structure of the sync channel for information transfer channel synchronization of the transmitting device;
Fig. 19 is a block diagram illustrating the installation procedure of synchronization in accordance with the structures of the channel synchronization;
Fig.20A, 20B and 20C options setting unit synchronization, shown in Fig.10; and
Fig. 21A and 21B is a flowchart illustrating embodiments of the verification procedures of the word synchronization.

Detailed description of preferred embodiments of the invention
Next, with reference to the accompanying drawings, describes preferred variants of the present invention. In the following description, well-known functions or constructions are not described in detail, so that n is according to the characteristic of the present invention is applicable to a mobile communication system mdcr, especially to the system SMDR. The present invention particularly relates to the use of the word synchronization to verify synchronization. Here the word synchronization is a sequence of bits in a pattern known to both transmitter and receiver. Although the pattern of the word synchronization is usually determined in advance and stored in the transmitter/receiver, it is created during the actual work and is transmitted between the transmitter and the receiver.

There are three aspects synchronization: synchronization elementary pseudotumour (PSH) parcels, the time intervals synchronization and frame synchronization. The receiver is synchronized with the time signal provided by the signal transmitted by the transmitter elementary PSH sending, time interval and frame respectively. A variant of the present invention provides a device and method for forming the word synchronization, which is used for testing personnel (the frame is the basic unit when the transmission synchronization. Check frame synchronization is performed after installing sync elementary PSH assumptions, time intervals (time buckets) and frames. To achieve this predatorian word synchronization with the received word synchronization to check framing. If frames are not synchronized, then the installation process synchronization is repeated. Otherwise, if the frames are synchronized, the operation checks the synchronization ends, as shown in Fig.21A, or repeated in the resynchronization process, as shown in Fig.21B.

The following describes the process of framing. In figures 1A, 1B and 1C presents the concept of frame synchronization in a communication system SMDR. In the drawings, the time intervals are numbered from 1 to 15 in the assumption that one frame contains 15 time intervals.

In Fig. 1A, 1B and 1C, each of the upper frame represents the time period of a valid frame signal, and each lower frame represents a period of time frame, "captured" (received) by the receiver. In Fig.1A shows the case when the length of time the actual frame coincides with the "captured" by the length of time frame, and two frames are synchronized. In figures 1B and 1C shows the cases where the time period of the actual frame is different from the "captured" time frame, and two frames are not synchronized. Here it is assumed that the time intervals synchronized, even if not sinkronizirano in the time interval of each channel according to developed standards 3GPP radio for SMDR. The pilot signal in each channel is not modulated signal is spread spectrum, which provides the basis for coherent demodulation, which is used for channel estimation.

In Fig.2A shows the structure of a time frame reverse dedicated physical control channel (uplink direction) (WFVKO) with the pilot signal containing from 5 to 8 bits at the start of each time interval. In a dedicated direct physical control channel (downstream) (VPNKU) in Fig.2B at the end of each time interval includes a pilot signal occupies 4, 8 or 16 bits. In Fig.2C shows the structure of a time interval (downward) primary common physical control channel (NPAFC). Here, the pilot signal is located at the end of each time interval, occupying 8 bits. In the "descending" secondary physical control channel (NWICO) pilot signal is 8 or 16 bits at the end of each time interval, see Fig.2D. The bit position of the pilot signal in the time interval can be changed, if the transmitter and receiver will know the situation in advance.

Part of bits of the pilot signal in the structures of the time interval, parasanali, used to form part of the word synchronization, referred to as symbol synchronization (synchronization bits). The bits of the synchronization in one time interval to form one symbol synchronization, and the synchronization symbols of one frame form one word synchronization.

In Fig. 3A-3H shows the synchronization bits among bits of the pilot signal in the specific time interval of each channel, as foreseen by the standards of the 3GPP radio communication system SMDR. Where there's no shading bits in Fig. 3A-3H are bits of the pilot signal having the same value in all time intervals, i.e. they are not bits of synchronization. These bits pilot signal are called standard bits of the pilot signal. Shaded bits are bits synchronization with specific values in different time intervals to use when checking framing. The bits of the pilot signal is fully or partially used for channel estimation.

Four (4) bits of the pilot signal containing from 5 to 8 bits, are used as synchronization bits in one time interval downstream of WFCU, as shown in Fig. 3A-3D. In Fig.3E and 3F as synchronization bits are used 2 of the 4 bits piloty pilot signal of 4 bits synchronization in a time interval of the descending VPM, NPAFC or NWFCU. In Fig.3H as synchronization bits used 8 of the 16 bits of the pilot signal in a time interval of the descending WCF or VUFKU.

Examples of location and the number of bits synchronization pilot signal shown in Fig.2A-2D and Fig.3A-3H for a better understanding of the variants of the present invention. Obviously that can be offered to other patterns of time intervals and options for the location of bits within the scope and merits of the present invention.

As described above, this variant of the present invention provides a widely used template word synchronization, and method and apparatus for forming a pattern of the word synchronization in the communication system SMDR, where one frame includes 15 or 2P-1 (P is a positive integer) time intervals. For clarity, the following description of a variant of the present invention is based on the assumption that one frame contains 15 time intervals.

In Fig. 4A, 4B and 4C shows the different word synchronization, formed from the bit synchronization in time intervals of one frame.

In Fig.4A one symbol synchronization consists of 2 bits, and one word synchronization includes 30 bits (215). On 26.gif">15). In the case of 8-bit character synchronization word sync is 120 bits (815), as shown in Fig.4C. Word synchronization is shown in Fig.4A, 4B and 4C, are repeated in each frame.

In Fig.5A-5D shows the relationship between frame intervals, the pilot signals and word synchronization. In Fig. with 5A through 5D one frame contains 15 time intervals (see Fig.5A), one time interval includes data pilot signal and other information (TPC, TFCI) (see Fig. 5B), the pilot signal contains synchronization bits and type bits of the pilot signal (see Fig.5C), and the word synchronization is formed of synchronization bits in one frame (see Fig.5D).

In Fig. 6 shows a pattern of the word sync word sync out of 60 bits according to a variant of the present invention.

In Fig.6 as an example it is shown that the number of bits in the symbol synchronization is N, and the period of the word synchronization (word length synchronization) is 15N. If N is equal to 4, the length of the word synchronization is 60 bits. For the formation of such words framing, which is shown in Fig.5A-5D, in this embodiment of the present invention will require N(4) m-posledovatelnostei equal to the period m-sequence. Thus, the word synchronization is formed using m-sequences. N(4) m-sequences can be created using the same or different generating polynomials, and m-sequences that are obtained from the same generating polynomial, can have the same or different starting point.

If the i-th element of the n-th m-sequence of N m-sequences is an MSn(i) the synchronization symbols in the 15 time slots will appear as shown in the table.1.

For N=4 in Fig.5 the word synchronization is shown in table. 2.

Above the word synchronization is formed in one of two ways.

In the first method, step 2 is repeated for the time interval number i equal to 1 to 15 in step 1, step 3 is repeated for the bit number n equal to 1 to N in the time interval in stage 2, bit MSn(i) synchronization is formed by use of the generator m-sequence at stage 3, and stage 4 is given the bit synchronization MSn(i).

In the second method, form N m-sequences of length 15, and step 2 is repeated for each frame in step 1, step 3 is repeated for the time interval with n is at stage 3, and in step 4 issued-bit MSn(i) synchronization, formed in step 3.

The formation of the word synchronization presents a block diagram of the sequence of operations shown in Fig.7.

In Fig.7 to form the word synchronization at step 711, the index i of the time interval is set to 1, and at step 713 index n sync in the time interval # 1 is set to 1. At step 715 is issued bit MSn(i) synchronization of generator m-sequence, and in step 717 index n sync is incremented by 1. If n is less than or equal to 4, then the procedure returns back to step 715. If at step 719 is determined that n is greater than 4, then at step 721, the index i of the time interval increases by 1. If the index i of the time interval greater than 15, then at step 711, the index i of the time interval is set equal to the initial value 1, and the above procedure is repeated. If the index i of the time interval is less than or equal to 15, then at step 713 index n sync is set to an initial value 1 for the formation of bit synchronization in the next time interval, and the above procedure repeated.

The word synchronization generated by the operation of paraveterinary.

If the frames are synchronized (Fig.8), i.e. the shift of time intervals is 0 or a multiple of 15, the autocorrelation of the word synchronization is 15N. In the case of asynchronous frames, that is, when the shift time intervals different from 0 or is not a multiple of 15, the autocorrelation of the word synchronization is N. Accordingly, the frame synchronization can be verified with a high degree of reliability through the use of the word synchronization created in the above manner.

The following describes the structure and functioning of the transmitting device and receiving device for transmitting and receiving the word synchronization in the communication system SMDR according to a variant of the present invention.

In Fig. 9 presents a block diagram channel a device for the formation of the word synchronization and transmission word synchronization at the base station or the mobile station according to a variant of the present invention.

Generator word sync 911 (Fig.9), which is described below together with Fig.11, 12 and 13, gives the symbol synchronization, consisting of N bits synchronization in each time interval, to form the word synchronization, that is, the word synchronization with 15xN bits synchronization. Pin is a user) 911 words synchronization and typical bits of the pilot signal over the period of the pilot signal for each time interval and the second signal sel2 to select the pilot signal and other data (bits TPC, TFCI) in each time interval. Since, as shown in Fig. 3A-3H, the periods of the pilot signal at different uplink and downlink are different, the controller 921 generates the first signal sel1 to select bits sync and sample bits of the pilot signal, which must be entered for the period of the pilot signal in each time interval of the corresponding channel in accordance with the corresponding bit pattern synchronization and sample bits of the pilot signal shown in Fig.3A-3H. The controller 921 generates a second signal sel2 to select the position of the data pilot signal in each time interval of the channel in accordance with the pattern of the location of the associated data, the pilot signal shown in Fig.2A-2D. The second signal sel2 selection is necessary in order to enter the selected data pilot signal in different positions in the time interval depending on uplink and downlink, as shown in Fig.2A-2D. The first selector 913 multiplexes the bits of the synchronization obtained from the generator 911 words synchronization, and standard bits p of the second selector 915 multiplexes the pilot signal, taken from the first selector 913, and other data in response to the second signal sel2 selection according to the corresponding pattern shown in Fig.2A-2D. The first and second selectors 913 and 915 may be multiplexers. The expansion unit 917 extends the information of the time interval received from the second selector 915.

The transmitting device at the base station (BS), in addition, has the transmitter channel synchronization, which is described below. Synchronization data is transmitted through the primary and secondary synchronization channel (P-CS and-CS) or only through the P-KS. The synchronization channel are described below with reference to Fig.16A-18.

In Fig. 10 presents a block diagram of a receiving device for receiving the word synchronization at the base station or the mobile station according to a variant of the present invention.

In Fig.10 block 1013 synchronization settings sets the sync elementary PSH shipments on time intervals or frames of the received signal over two or three stages. Block 1013 synchronization installation disclosed in detail in patent application Korea 99-15332. First will be described the structure of the synchronization channel. In Fig.16A-17C show three patterns of synchronization channel.

In Fig. 16A shows the structure of a reference position 1613 means-KS, and the reference position 1615 denotes the signal of the common pilot channel signal. One frame contains 15 time intervals. P-KS and KS are transmitted with an overlap of length N1 elementary parcels from the beginning each time interval, since they are mutually orthogonal. Signal common pilot channel signal is expanding individual PN code having a period equal to the frame length.

"Golden" code (gold code) with a period of 218-1 is divided by the frame length, and divided gold codes are used as different PN codes in the above communication system SMDR. From all available "gold" codes used M (512) gold codes. Signal common pilot channel signal is transmitted without overlapping with either the P-COP or the COP in each time interval, as shown in Fig.16A.

Synchronization codes used for the synchronization channel, are generated by modulo addition of a Hadamard sequence and a hierarchical sequence. A hierarchical sequence in the form of sequences x1and x2the length of the n1and n2respectively:
y(i)=x2(i mod n2)+x1(i div n1for i=0,..., (n1x n2)-1,
where x1and x2have a length equal to 16 the Hadamard sequence of length 256 get the next synchronization code:
{c_{sc_n}}=<h(0)+y(0), hn(1)+y(1), hn(2)+y(2),..., hn(255)+y(255)>
For fast Hadamard transform primary synchronization code Withpand secondary synchronization codes {C1,...,C17} defined as
SR=s{sc_0}
s_1=c_{sc_i}~~~(i=1,..., 17)
Synchronization code #0 Cpdispatched within 1/10 of each time interval, i.e. within the 256 elementary parcels. The same synchronization code used in the channels of the P-KS all cells. Coordination in time time intervals of the received signal is determined using P-KS. To send In-KS from the transmitter code is entered without the decimal point. Code without decimal point includes 32 code words, each code word contains 16 characters. The code word is transmitted repeatedly in each frame. 16 symbols of the code words are displayed in synchronization codes for transmission. As shown in Fig.16A, the i-th synchronization code corresponding to the symbol i is transmitted in each time interval. 32 code words of the code without decimal point identify the 32 groups of base stations. Because the code without decimal point differs in that each code word has a unique, different from others is the cyclic shift information about the basic group is the organization in time or phase in one period of the PN code extends the system with spread spectrum. One period extends code and one frame is 10 MS in the existing communication system SMDR. The above process is called human resource synchronization.

Finally, code is determined under consideration of the base station by calculating the correlation extends the code used in the base station. When calculating the correlation can be used direct common channel, such as channel pilot signal and the channel broadcast. Although the symbols of the pilot signal transmitted over the channel, when the multiplexing time division (ISI) in the communication system SMDR, when dealing with the reconciliation of the last of the standards discusses the possibility of transmission by using multiplexing code division (FDM) symbols of the pilot signal. In Fig.16A direct common pilot channel signal is transmitted using MCR and is interrupted when transmitted synchronization code.

In Fig. 16V direct common channel 1617 pilot signal is transmitted using MCR continuously, including when transmitted to the synchronization channel.

Symbols of the pilot signal and data may be transmitted using the MBP on the common pilot channel signal (in the existing communication system SMDR), or data can be transmitted Otakara channel pilot signal.

In Fig.17A, 17B and 17C presents other concepts synchronization channel for framing.

In Fig.17A, 17B and 17C are depicted as timesync determines the establishment of synchronization in time for one period extends code in the system with spread spectrum. In the drawings, the channel signal synchronization is introduced into a predetermined position in the same period, expanding code. The receiver corresponding to the transmitter, which uses the structure of the channels, first detects the signals of the synchronization channel, and then automatically sets the vertical synchronization after detection of the sync channel. Here timesync determines the synchronization in time or phase in one period of the PN code extends the system with spread spectrum. In the existing communication system SMDR one period extends code and one frame is 10 MS. This process is called human resource synchronization. For detection of the synchronization channel may be used known matching filter. Compared with synchronization in the communication system SMDR frame synchronization can be achieved by using a single channel synchronization is often one acnowledge time) in one period P extends code in the system with spread spectrum. This preset position is separated from the start point of period P (i.e. the initial state) at a predetermined distance from L elementary parcels. L is coordinated in advance between the transmitter and receiver. Channel synchronization corresponds to the duration of N elementary parcels, in the embodiment of the present invention 256 elementary assumptions. The receiver detects the signal of the sync channel using the matching filter. After detection of the signal channel synchronization, the receiver is automatically synchronized in time with PSH extend code. That is, it is determined that the period extends code starts with L elementary parcels before the detected channel signal synchronization.

In Fig. 17B, the sync channel is transmitted at L=0. To have the initial channel signal synchronization coincides with the initial time period extending code. In Fig.17C shows the case when the end-point signal channel synchronization coincides with the initial time period extending code when L=P-n

If the extender code uses only one PN code detection signal channel synchronization is equivalent to detection of extending the code. If ramnik detects the signal channel synchronization. Then the mobile station receives the information about the phase (timing) extends codes, although she does not know which extend code was used. Then the receiver calculates the correlation of each code extends through the compression on the basis of information on the temporal characteristics and specifies extend the code by obtaining the maximum value of the correlations, comparisons of correlations with the threshold values, or use both of these approaches. Thus, the receiver sets the final synchronization.

Although in Fig.17A, 17B and 17C shows a channel signal synchronization, inserted once for the period extending code, you can also consider when the channel signal synchronization is inserted once for several periods or several times in one period to establish temporal characteristics extend code.

In Fig. 18 shows the block diagram of a transmitting device for transmitting signals of the sync channel having the structure shown in figures 16A through 17C.

Converter 1811 sequential code in parallel (SPT) (Fig. 18) converts the received signal of the common pilot channel signal in the data parallel I and Q channels. Omnoi the/sub>. All channel extends codes used in Fig.18, can be expressed in complex numbers. Block 1814 phase shift changes the phase of the extended data of the Q channel 90o. The adder 1815 forms a comprehensive advanced total signal i+jQ by summing the output signals of the multiplier 1812 and block 1814 phase shift.

SPT 1821 converts the received P-CA in data parallel I and Q channels. Multipliers 1822 and 1823 expand data P-KS channels I and Q with the channel extending codep. Block 1824 phase shift changes the phase of the extended data of the Q channel 90o. The adder 1825 forms a comprehensive advanced total signal i+jQ by summing the output signals of the multiplier 1822 and block 1824 phase shift.

SPT 1831 converts the received In-CA in data parallel I and Q channels. Multipliers 1832 and 1833 expand data-KS channels I and Q with the channel extending code Cs. Block 1834 phase shift changes the phase of the extended data of the Q channel 90o. The adder 1835 forms a comprehensive advanced total signal i+jQ by summing the output signals of the multiplier 1832 and block 1834 phase shift.

The above channel transmitting device may DOPOLNITEL it is necessary to provide additional transmitters total direct channels and transmitters direct channels.

The controller 1800 amplification generates a signal to control the gain to control the transmit power of each channel signal and determine whether to send the channel signal. In particular, when the base station operates in synchronous mode, the gain-KS is set to 0 so as not to pass-KS, as implemented in one embodiment of the present invention. The controller 1800 strengthening also provides control of how often and with what power level to transmit P-KS. Thus, the transmission structure proposed in the present invention is applicable to a base station regardless of what mode, synchronous or asynchronous, it works.

In synchronous mode, the controller 1800 gain issues as signal Gs-sch of a gain control signal is equal to 0, and then the controller 1836 gain outputs 0 as the signal-KS. The controller 1800 amplification produces a signal Gp-sch control the gain of the higher power in synchronous mode than in the asynchronous mode during a predetermined frame period, and outputs 0 as the signal Gp-sch management strengthening. Then the controller 1826 amplification produces a signal P-KS that have the value 1 or the value of a high level of uregulirovan the flesh. The controller 1800 amplification generates a signal Gp-ch control gain for channel pilot signal. The signal Gp-ch control gain may be set to 0 when a signal is generated Gp-sch control the gain for P-KS.

The adder 1860 summarizes channel signals with the adjusted gain received from the gain 1816, 1826 and 1836. Filters 1861 and 1871 unmodulated signals to produce demodulated signal from the total signal received from the adder 1860. Multipliers 1862 and 1864 multiply the output signals of filters 1861 and 1863 unmodulated signals at the respective carrier.

In Fig.19 presents a flowchart showing the sequence of operations when installing the synchronization signals sync channel structure shown in Fig.16A-17C, which take from the transmission device shown in Fig.18. Operation of the receiving device (e.g., mobile station) according to the operating mode of the transmitting device (e.g., base station), i.e. synchronous or asynchronous mode, is illustrated in Fig.19.

In Fig. 19 shows how the mobile station determines in which mode the serving base station. Mobile station at step 1818 determines that synchronet asynchronous mode, it performs well-known three-stage search process starting cells. Mobile station at step 1815 sets the synchronization time interval at step 1817 selects a code group and synchronizes the frames, and the step 1819 defines the code of the base station in a code group. Alternatively, if the mobile station selects at step 1818 synchronous mode, it sets the stage 1814 frame synchronization and phase 1818 defines the code of the base station.

In Fig. 20A, 20B and 20C presents the block diagram of the block 1013 synchronization installation to install the frame synchronization in the receiver according to the received channel signal synchronization.

In one embodiment, block 1013 synchronization installation shown in Fig. 17A, the receiver of the mobile station establishes frame synchronization using a single channel synchronization. In Fig.20A shows how the receiver tries to detect the sync channel using the matching filter 1811. Block 1813 decision framing determines whether the detected channel synchronization in the attempt, undertaken with the help of a matching filter 1811. Block 1813 decision framing is a block prinyatiya decisions about framing, the controller 1815 on the basis of the information received manages the work group 1817 blocks compression. Group 1817 compression blocks includes at least one compressor unit for parallel compression. Group 1817 blocks compression works the same way as block 1011 compression, is shown in Fig.10. Group 1817 blocks compression performs compression of the input signal using the available extender sequences, and block 1819 decision about extending the sequence determines which extends the sequence was used as an extender code from the compressed signals received from a group of 1817 compression blocks, and checks the setting of the synchronization. The result is fed into the controller 1815, informing him about was whether successful attempt final synchronization.

In Fig.20B shows the structure of a block 1013 synchronization installation operating in synchronous or asynchronous mode in accordance with the mode selection made by the controller in the mobile station.

The controller 1829 selects the operation mode, synchronous or asynchronous. If you select asynchronous mode, the coefficients of the matching filter 1821 are set equal to the values corresponding to an asynchronous mode. Then, the station attempts to detect the sync channel, using the matching filter 1821. Block 1823 decision about the detection of P-CS determines whether the detected P-KS from the attempts received from the matching filter 1821. After receipt of the decision and information about framing from block 1823 decision about the detection of P-CA controller 1829 on the basis of the information received manages the group's work 1831 blocks compression. Group 1831 blocks compression compresses the input signal using the available extender sequences. Block 1833 decision about expanding sequence determines which extends the sequence was used as an extender code from the compressed signals received from a group of 1831 compression blocks, and checks the setting of the synchronization. The result of the determination is supplied to the controller 1829, informing him about was whether successful final sync.

In Fig. 20C shows a third alternative implementation of the block 1013 synchronization installation, in which instead of selecting the controller 1857 synchronous or asynchronous mode calculates the correlation of the input signal ID of the primary synchronization in synchronous mode and code primary synchronization in asynchronous mode pore theme. The configuration of the first matching filter 1851 calculates the ratio and correlation code primary synchronization in synchronous mode. The configuration of the second matching filter 1853 calculates the ratio and correlation code primary synchronization in asynchronous mode. Block 1855 decision about the detection of P-COP gets the value of the correlations from the matching filter 1851 and 1853 and determines the mode of operation of the system. In asynchronous mode, the block 1855 decision about the detection of P-KS, additionally, it checks the synchronization time intervals. In synchronous mode, the block 1855 decision about the detection of P-KS additionally checks the frame synchronization. If the system is operating in asynchronous mode, the controller 1857 goes to the final process synchronization by means of known three-step search of the cell. If the system is operating in synchronous mode, the controller 1857 manages a group of 1863 blocks compression on the basis of information about framing. Group 1863 blocks compression compresses the input signal using the available extender sequences, and block 1865 decision about expanding sequence determines which extends th the shackles of compression, and checks the setting of the synchronization. The result of the determination is supplied to the controller 1857, informing him about was whether successful final sync.

Below with reference to Fig.10 will be described examination of the word synchronization, received in the receiving device from the transmitting device shown in Fig.9. In Fig.10 unit 1011 compression compresses the received channel signals based on the synchronization information, adopted from block 1013 synchronization installation. The controller 1015 generates a control signal for selection and selection of the pilot signal and other data from the corresponding channel among the signals in time slots in the formats shown in Fig.2A-2D. The demultiplexer 1017 demuxes the pilot signal and other data of the corresponding channel, choosing from a pilot signal bit patterns of synchronization shown in Fig. 3A-3H, in a compressed time interval in response to a select signal received from the controller 1015. Here demultiplexer 1017 performs an operation reverse operation of the second selector 916 shown in Fig.9. Block 1019 highlight the word synchronization allocates the bits of the synchronization of the pilot signal in each time interval. That is, block 1019 highlight the word synchronization allocates bits synchronization performs the operation reverse operation of the first selector 913 shown in Fig.9. The functioning of the unit 1019 highlight the word synchronization can be managed by the controller 1015.

The verifier 1023 framing takes the bits of the synchronization block 1019 highlight the word synchronization and word synchronization generator (driver) 1021 words synchronization and checks the frame synchronization. In Fig.15 presents a block diagram of the verifier 1023 framing.

The verifier 1023 framing (Fig.15) receives word synchronization from block 1019 highlight the word synchronization and auto-generated word sync generator (driver) 1021 word synchronization, and then generates a signal to check framing. The adder 1511 performs a bitwise combination of two words synchronization. Accumulating adder 1513 accumulates the summed signal on a frame-by-frame basis, and calculates the correlation of the two synchronization words. Block 1515 definition determines whether the established frame synchronization on the basis of correlation values, taken from accumulating adder 1513. Block 1515 definitions compares a preset threshold value with the output signal Nakai received correlation value is greater than or equal to the threshold value, the unit 1515 definitions decides that the frame synchronization is established. Otherwise, it decides that frames are not synchronized. In the latter case, block 1013 synchronization settings sets the frame synchronization in response to the notification unit 1515 definitions.

Generator (driver) 911 word synchronization is shown in Fig.9 (of the transmitter), and the generator 1021 word synchronization is shown in Fig. 10 (part of the receiver), can form the word synchronization using m-sequences. If one frame includes 15 time slots, or 2P-1 time intervals, the length of m-sequence is equal to the number of time intervals, and the number of m-sequences is equal to the number N of bits synchronization in the same time interval. Generators 911 and 1021 words synchronization can have the configuration shown in Fig.11, 12 and 13.

In Fig. 11 shows a block diagram of a variant of implementation of the generator (driver) word sync.

Each of N (the number of bits in one time interval) (Fig.11) generators 1111-111N m-sequences produces one bit simultaneously in each time interval in accordance with a clock signal is from generators 1111-111N m-sequences. That is, as the symbol synchronization, consisting of N bits, sequentially issued bits timing generator 1111-111N m-sequences. Assuming that one frame contains 15 time slots, each generator m-sequence generates an m-sequence of period 15. Consequently, the entire sequence of the word synchronization is 15 time intervals (i.e. one frame), and during this period is given 15xN bit synchronization. Thus, the word synchronization is issued in the form of the pattern shown in Fig.5. In Fig.11 generators 1111-111N m-sequences can form different m-sequence, or a part of the generators of m-sequences can form an m-sequence, shifted relative to the other m-sequences.

In Fig.12 shows a block diagram of another variant implementation of the generator word synchronization.

In Fig. 12 shows the generator word synchronization, which includes the generator 1211 m-sequence to generate m-sequence elements 1212-121N delay for delaying the m-sequence to the corresponding preset values of the time delays and the selector 1223 for mu is successive and each element 1212-121N delay form one type of m-sequence for one time interval in accordance with a clock signal time interval and delay this m-sequence in time. That is, N-bit symbol synchronization is formed directly by the generator m-sequence, and accordingly delayed m-sequences are generated on output elements 1212-121N delay. Although in the embodiment shown in Fig.12, depicts the m-sequence generator 1211 m-sequence, simultaneously at the input of each element 1212-121N delay, we must also consider the variant in which the output signal of the element 1212 delay is simultaneously supplied to the selector 1223 and the element 1213 delay (not shown), and the output signal of element 1213 delay is simultaneously supplied to the selector 1223 and the element 1214 delay (not shown). Generator 1211 m-sequence can generate an m-sequence of period 15. Consequently, the entire sequence of the word synchronization is 15 time intervals, i.e. for the period of one frame are issued 15xN bit synchronization. Elements 1212-121N delays have as their delay values from 1 to 15 clock pulses and produces different m-sequences. It should be noted that all detainees sequences are m-sequences, which stems from the nature of the m-sequence.

the tion.

In Fig.13 shows that the m-sequence is generated outside shows the schema and stored in a memory device 1311 word synchronization. In the pattern shown in Fig.5, is formed the same word synchronization, which is formed in Fig.11 and 12. This method is applicable when the storage device has additional capacity.

In Fig.14 shows a device for presenting information about the length of the word sync generators 911 and 1021 words synchronization with the structure shown in figures 11, 12 or 13. In Fig.14 input oscillator part of the word synchronization is common regardless of the structures shown in Fig.11, 12 and 13, and in other drawings are not shown. Generators 911 and 1021 words receive synchronization information (e.g., N) on the size of the word synchronization controller 1411 words synchronization and generates word synchronization (for example, N bits in one time interval and 15N bits in one frame) in accordance with the received information.

The above procedure install the synchronization ends as soon as one test synchronization, as shown in Fig.21A, or re-executed in every predetermined period, as shown in Fig.21B.

At step 2111 p is 2113 checked the installation framing. If at step 2115 is determined that the correlation is greater than a threshold, then the check frame synchronization is aborted and re-executed human demodulation and decoding. Otherwise, the procedure returns to step 2111.

At step 2121 after installing synchronization (Fig.21B) calculates the correlation of the word synchronization, resulting in step 2123 checked the installation framing. If at step 2125 is determined that the correlation is greater than a threshold, then the check frame synchronization is aborted and re-executed human demodulation and decoding, and then the procedure returns to step 2123 to check framing in the next period. Otherwise, the procedure returns to step 2111.

According to a variant of the present invention described above, formed the word synchronization has a correlation characteristic shown in Fig.8, which follows from the nature of m-sequences. If the frames are synchronized, i.e. the shift is equal to 0 or a multiple of 15, the autocorrelation of the word synchronization is 15xN, and if the frames are not synchronized, then the autocorrelation is N. Therefore, the vertical synchronization mo is obom.

Although this invention has been shown and described with reference to specific preferred implementation, specialists in the art it is obvious that it can be made various changes in form and detail, not beyond being and scope of the invention defined by the attached claims.


Claims

1. Apparatus for forming word synchronization generated by the synchronization symbols for synchronization of frames, each of which has a predetermined number of time intervals in an asynchronous communication system with multiple access and code division multiplexing (mdcr, CDMA), containing at least two generators of m-sequences, where each generator is designed to generate a predetermined number of sequential elements, and a selector for multiplexing the successive elements taken from the generators of m-sequences, and the distribution of multiplexed sequential elements at time intervals, forming the symbol synchronization at each time interval.

2. The device under item 1, in which the duration is of Donatella form a different m-sequence.

4. The device according to p. 2, in which the generators of m-sequences form different m-sequences, and optionally containing a number of delay elements for the formation of other great m-sequence by delaying the m-sequences taken from the generators of m-sequences.

5. The device according to p. 3, in which the number of m-sequences generated by the generators of m-sequences is equal to the number of bits synchronization time intervals.

6. The method of formation of the word synchronization generated by the synchronization symbols for synchronization of frames, each of which has a predetermined number of time intervals in an asynchronous communication system mdcr, containing the steps of: forming a predetermined number of consecutive elements in at least two generators of m-sequences and perform multiplexing of the sequential elements and the distribution of the selector multiplexed sequential elements at time intervals, forming the symbol synchronization at each time interval.

7. The method according to p. 1, in which the frame duration is 10 MS and the frame has 15 time intervals.

8. Spas, in which the generators of m-sequences form different m-sequences, and optionally containing phase, which form the other great m-sequence by delaying the m-sequences taken from the generators of m-sequences in multiple delay elements.

10. The method according to p. 8, in which the number of m-sequences generated by the generators of m-sequences is equal to the number of bits synchronization time intervals.

11. Apparatus for forming words framing that includes the first symbol synchronization and the second symbol synchronization in the time intervals of the frame for frame synchronization in an asynchronous communication system mdcr containing the first generator m-sequence for forming the first consecutive elements in number equal to the number of time slots in the frame, and output the first consecutive elements in a sequence of the first symbol synchronization, the second generator m-sequence for forming the second consecutive elements in number equal to the number of time slots in the frame that is different from the first sequential elements, and output the second paragraph is plexitube the first and second synchronization symbols, taken from the first and second generators of m-sequences, and the distribution of multiplexed symbols in the respective time intervals, and a controller for forming the first and second selection signals to control the selector.

12. Apparatus for forming words framing that includes the first symbol synchronization and the second symbol synchronization in the time intervals of the frame for frame synchronization in an asynchronous communication system mdcr containing the first generator m-sequence for forming the first consecutive elements in number equal to the number of time slots in the frame, and output the first consecutive elements in a sequence of the first symbol of the synchronization delay element for delaying the first symbol synchronization at one time interval and output the delayed symbol synchronization as the second symbol synchronization, a selector for multiplexing the first and second synchronization symbols, taken from the first generator m-sequence and delay elements, and the division multiplexed symbols in the respective time intervals, and a controller for formirovanii synchronization includes first to fourth synchronization symbols in the time intervals of the frame for frame synchronization in an asynchronous communication system mdcr containing the first to fourth generators of m-sequences for forming the second consecutive elements and the output of the sequential elements as the first to fourth synchronization symbols, and each symbol synchronization has as many consecutive items, how many time slots contained in the frame, and a selector for multiplexing the first through fourth synchronization symbols, taken respectively from the first to fourth generators of m-sequences, and distribution of the multiplexed symbols in the respective time intervals under the control of the controller.

14. Apparatus for forming words framing, containing the first to fourth synchronization symbols in the time intervals of the frame for frame synchronization in an asynchronous communication system mdcr containing the first and second generators of m-sequences for the formation of different sequential elements and the output of the sequential elements as the first and second symbols Shin intervals contained within the frame, the first and second delay elements for delaying the first and second synchronization symbols in one time interval and output the delayed synchronization symbols as the third and fourth synchronization symbols, respectively, and a selector for multiplexing the first through fourth synchronization symbols received from the first and second generators of m-sequences and the first and second delay elements, and the distribution of multiplexed with the first through fourth synchronization symbols in the respective time intervals under the control of the controller.

15. Apparatus for forming words framing, which includes first to fourth synchronization symbols in the time intervals of the frame for frame synchronization in an asynchronous communication system mdcr containing the generator m-sequence to generate a sequence of elements in number equal to the number of time slots in the frame, and the output of the sequential elements as the first symbol synchronization, the first, second and third delay elements for delaying the first symbol synchronization at one time interval and output the delayed symbols sync the resources from the first to the fourth synchronization symbols, taken respectively from the first generator of m-sequences and the first, second and third delay elements, and the distribution of multiplexed with the first through fourth synchronization symbols in the respective time intervals under the control of the controller.

16. Apparatus for forming words framing, which includes the first to the eighth synchronization symbols in the time intervals of the frame for frame synchronization in an asynchronous communication system mdcr containing the first to fourth generators of m-sequences for forming the second consecutive elements and the output of the sequential elements as the first to fourth synchronization symbols, and each symbol synchronization has as many consecutive items, how many time slots contained in the frame, first to fourth delay elements for delaying the first to the fourth synchronization symbols per slot and renditions of characters from the fifth to the eighth of synchronization symbols, respectively, and a selector for multiplexing the first to the eighth of synchronization symbols, taken respectively from the first to the fourth is Tserovani from the first to the eighth of the synchronization symbols in the respective time intervals under the control of the controller.

17. Testing device for frame synchronization in an asynchronous communication system mdcr, in which one frame has plenty of time intervals, each time interval has a lot of bits and each frame has the word synchronization, containing at least two generators of m-sequences, each generator generates as many consecutive items, how many time slots contained in the frame, the generator of the word synchronization generated by multiplexing the successive elements obtained from the generators of m-sequences, and the distribution of the multiplexed sequential elements in the corresponding time intervals, forming a synchronization symbols, to output the words framing, block compression data compression time intervals of the word synchronization received from the base station device, the block allocation of word synchronization for the selection of the synchronization symbols of the compressed time intervals under the control of the controller and the verifier framing connected to a generator of the word synchronization and block allocation of word synchronization for checking framing by comparing the synchronization words, SF synchronization and signal validation framing.

 

Same patents:

The invention relates to techniques for digital communication, namely, devices for frame synchronization in digital communication systems with a temporary seal

The invention relates to a method of transmitting digital data and can be used for frame synchronization in systems robust data protection with application of the adjustment, in particular, concatenated codes

The invention relates to the transmission of discrete information and can be used for frame synchronization in systems robust protection using corrective, in particular concatenated codes

The invention relates to systems for the transmission of discrete data and can be used for frame synchronization in systems robust data protection that apply corrective, in particular concatenated codes

Device sync cycles // 2192711
The invention relates to communication technology and can be used for receiving data from a downhole telemetry system using looped packets of digital data

The invention relates to techniques for digital communication, namely, devices for frame synchronization in digital communication systems with a temporary seal

The invention relates to techniques for digital communication, namely, devices for frame synchronization in digital communication systems with a temporary seal

The invention relates to techniques for digital communication, namely, devices for frame synchronization in digital communication systems with a temporary seal

The invention relates to techniques for digital communication, namely, devices frame synchronization in digital transmission systems with a temporary seal

The invention relates to the transmission of digital video and data network digital video

The invention relates to the field of radio and digital technology

The invention relates to techniques for digital communication, namely, devices for frame synchronization in digital communication systems with a temporary seal

The invention relates to a synchronous digital hierarchy network (SDH networks)

The invention relates to communication systems, and more particularly to systems with simultaneous transmission of the broadcasting programs of different stations

The invention relates to a method of synchronization data packets between the wireless terminal and the respective base station and can be used in digital wireless communication systems with multiple access with time division channels to ensure the correct reception of packets received with different delays caused by the effects of signal propagation

The invention relates to ATM systems, which use cross-BAR linkage to provide virtual connections

The invention relates to telecommunications systems and can be used in systems for receiving digital data broadcasting systems

The invention relates to a method of simultaneous transmission of signals, which can prevent the reduction of the rate of admission due to the phase difference signal generated by dispersing time of data transmission from the base station in the overlap of signals between the main stations in a paging system with many main stations

FIELD: radiophone groups servicing distant subscribers.

SUBSTANCE: proposed radiophone system has base station, plurality of distant subscriber stations, group of modems, each affording direct digital synthesizing of any frequency identifying frequency channel within serial time spaces, and cluster controller incorporating means for synchronizing modems with base station and used to submit any of modems to support communications between subscriber stations and base station during sequential time intervals.

EFFECT: enhanced quality of voice information.

12 cl, 11 dwg

Up!