Method for calibration and beam formation in radio communication system

FIELD: radio engineering, communication.

SUBSTANCE: radio communication method includes periodic calibration in each calibration interval to obtain a Node B calibration vector, wherein periodic calibration involves selecting a group of user equipment UE for calibration, and groups of UE are selected based on channel quality indicators (CQI) received from said UE; and forming a beam pattern for at least one UE in each calibration interval and applying said calibration vector, obtained for said calibration interval in which periodic calibration involves, in each calibration interval, calculation of at least one initial calibration vector for each UE in the selected group, and calculation of a Node B calibration vector based on the initial calibration vectors for all UE in the selected group.

EFFECT: high quality of radio communication.

11 cl, 13 dwg

 

The technical field to which the invention relates.

The present invention relates to communications and more particularly to a method of signal transmission in the radio network.

The level of technology

Communication systems are now widespread to provide various communication services such as voice, video, packet data, messaging, broadcast, etc. Such communication systems may be multiple access systems capable of supporting communication with multiple subscribers by sharing the available system resources. Examples of multiple access systems include systems multiple access code multiplex (CDMA)systems, multiple access with a temporary seal (TDMA)systems, multiple access frequency multiplex (FDMA)systems, multiple access orthogonal frequency multiplex (OFDMA) and FDMA system with single-carrier (SC-FDMA).

The radio network may include many Nodes B (Node B)that can support communication for a number of units of user equipment (UE). Node B can communicate with equipment UE via the descending line and upward. The descending line (or a straight line is a line from the Node B to the equipment UE, and the trend line (or return) is called the communication line from the equipment UE to the Node B. The node B may use multiple antennas to transmit data to one or more antennas equipment UE. Data need to be passed so that to achieve good performance.

The invention

Here are described the methods of calibration and beam forming in the communication system. According to one aspect, the Node B may periodically perform calibration in each interval with the group of units of equipment UE order to obtain a calibration vector for the Node B. the Node B may use this calibration vector to account for the error characteristics of the transmitting and receiving channels in the Node B.

In one embodiment, the Node B can in each calibration interval to select a group of units of equipment UE to perform a calibration, for example pieces of equipment UE with good quality channel. The node B may send the selected pieces of equipment UE message to enter calibration mode. The node B may accept the assessment of the characteristics of the descending channel from each of the selected pieces of equipment UE, and may also take at least one sounding reference signal, at least one antenna equipment UE. The node B may also calculate the estimate of the characteristics of the upward channel for each of the selected pieces of equipment UE based on the sounding reference signals, take emich from this UE. Node B can calculate at least one initial calibration vector for each selected equipment UE on the basis of estimates downward and upward channels for this UE. After that, the Node B may generate a calibration vector for themselves on the basis of the initial calibration vectors for all selected units of equipment UE. Further, the Node B may use this calibration vector as long as he will not be updated in the next calibration interval.

According to another aspect, the Node B may form a pattern for the equipment UE, taking into account the offset of the gain of multiple antennas equipment UE. This imbalance gain can be caused by the difference of the gain of receiving and/or transmitting circuits equipment UE. According to one of the scenarios, the Node B can determine predatious matrix taking into account the offset of the gain due to the different gain of the automatic gain control (AGC) for receiving paths of multiple antennas equipment UE. According to another scenario, the Node B can determine predatious matrix taking into account the offset of the acceleration due to (i) the difference of the gain in the power amplifier (PA) for transmitting circuits of multiple antennas equipment UE, and/or (ii) the difference in gain these NESCO is gcih antennas.

In one embodiment, the Node B can receive from the equipment UE, at least one relative gain. Each such relative factor determined by the gain of the considered antenna and the gain of the reference antenna in the apparatus UE. Each such gain may contain the gain of the AGC system, the gain in the amplifier RA, antenna gain, etc. of the Node B can determine the composite channel matrix based on a channel matrix for equipment UE and the gain matrix formed using at least one of the relative gain. In another embodiment, the Node B may receive a sounding reference signals from multiple antennas equipment UE. Each sounding reference signal may be transmitted by the equipment UE from one antenna at a power level determined based on the relative gain of this antenna. The node B may form a composite channel matrix based on the sounding reference signals. In both cases, the Node B can determine predatious matrix based on the composite channel matrix, which can be calculated based on the offset of the gain in equipment UE. After that, the Node B can form a diagram napravlennost the apparatus UE using prekodira matrix.

Various aspects and features of the present invention are described in more detail below.

Brief description of drawings

Figure 1 represents a telecommunication system.

Figure 2 represents the transmitting and receiving paths in the Node B and the equipment UE.

Figure 3 represents a Node B and a few pieces of equipment UE for calibration.

Figure 4 represents the reception of data from the calibration and without.

Figure 5 represents the equipment UE with the detuning of the gain between multiple antennas.

Figure 6 represents the process of calibration Node B.

Figure 7 represents the process of calibration in the calibration interval.

Figure 8 represents the device for calibration.

Figure 9 represents the process of forming the pattern in the Node B.

Figure 10 is a device for beam forming.

Figure 11 represents the process of receiving data with the generated pattern in the equipment UE.

Figure 12 is a device for receiving data with the generated pattern.

Figure 13 is a block diagram of the Node B and equipment UE.

Detailed description of the invention

The methods described herein may be used in various communications systems, such as CDMA, TDMA, FDMA, OFDMA, SC-FDMA and other systems is s. The terms "system" and "network" are often used interchangeably. A CDMA system may implement a radio technology such as universal terrestrial radio access (UTRA), cdma2000, and other System UTRA includes Wideband-CDMA (W-CDMA) and other variants of CDMA. The cdma2000 covers standards IS-2000, IS-95 and is-856. A TDMA system may implement a radio technology such as global system for mobile communications (GSM). An OFDMA system may implement a radio technology such as Advanced UTRA (E-UTRA), ultra-speed mobile (Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDM®, etc. System UTRA and E-UTRA are part of the universal mobile telecommunications system (UMTS). The system 3GPP Long Term Evolution (LTE) is a new, advanced version of UMTS that use E-UTRA, which employs OFDMA in the descending line and SC-FDMA in uplink. System UTRA, E-UTRA, UMTS, LTE and GSM are described in documents issued by the organization called "partnership Project third generation (3GPP). System CDMA2000 and UMB are described in documents issued by the organization called "Project third generation partnership 2" (3GPP2). For clarity, certain aspects of the proposed methods is described below in relation to LTE and in the description below, widely used LTE terminology.

1 shows a radio communication system 100, which may be an LTE system. Sist is mA 100 may include multiple Node B 110 and other network entities. The node B may be a fixed station that communicates with stations of the apparatus UE, and may also be referred to as developed by the Node B (eNB), base station, access point, etc. Each Node B 110 provides communication to a specific geographic area. To improve system capacity total service area of the Node B can be divided into several (e.g., three) smaller areas. Each smaller area may serve the corresponding subsystem of the Node B. In the document 3GPP, the term "cell" can refer to the smallest service area of the Node B and/or to the subsystem Node B serving this area.

Unit equipment UE 120 may be dispersed in the system, and each unit of equipment UE may be stationary or mobile. Equipment UE may also be referred to as a mobile station, terminal, access terminal, a subscriber unit, a station, etc. Equipment UE may be a cellular phone, a personal digital assistant (PDA), a radio, a radio station, handheld device, portable computer, cordless phone, etc.

The system can support the formation pattern data in the descending line and/or uplink. For clarity, most of the following descriptions applies to the formation of a pattern in the descending line. The formation of diagra what we focus may be used for transmission in multiple-input-single-output (MISO) from the multiple transmitting antennas of the Node B for one receiving antenna equipment UE. The formation of a pattern for transfer MISO can be expressed by the equation:

x=vs, what is (1)

where s is the vector of data symbols,

v - precederei vector for beam forming, and

x is the vector of output symbols.

Precederei vector v can also be referred to as the vector beam forming, managing vector, etc. This precederei vector v can be calculated based on the vector h characteristics of the channel for the MISO channel from the multiple transmitting antennas of Node B to one reception antenna equipment UE. In one embodiment, precederei vector v can be calculated on the principle of forming a pattern using pseudoobscura functions n the basis vector h characteristics of the channel for one column of the matrix characteristics of the channel. The formation of the pattern can provide a higher signal-to-noise and interference (SINR), which in turn will support higher speed data transfer.

The principles of beam forming can be also applied to the transmission scheme multiple-inputs-multiple-outputs (MIMO) from the multiple transmitting antennas of Node B multiple receiving antennas equipment UE. This formation pattern can transfer data at a few of their own modes of the MIMO channel formed by multiple transmitting antennas of Node B and multiple receiving antennas equipment UE. The matrix H of the MIMO channel can be reduced to diagonal form by means of the decomposition for special values as follows:

H=UDV,/mtext> mtext> (2)

where U - is ETERNA matrix of left eigenvectors of H,

V is a unitary matrix of right eigenvectors of H, and

D is the diagonal matrix with special meanings H.

Forming a pattern for MIMO transmission, which may also be referred to as forming a pattern using native functions that can be represented as:

x=Vs. mtext> (3)

As can be seen from equation (3), the matrix V of right eigenvectors can be used as prekodira matrix for beam forming. This predatious matrix can also be called a matrix beam forming, the control matrix, etc. Transmission using beam forming can create considerable gain compared to PE what educati without such formation, especially if the number of levels (or rank) transmission less than the number of transmit antennas at the Node C. This often happens in scenarios with asymmetric antenna structure, when the number of transmit antennas at the Node is greater than the number of receiving antennas in the equipment UE.

The system can support different reference signals for the descending and ascending lines, to facilitate the formation of the pattern and other features. The reference signal is a signal generated on the basis of known data, and may be referred to as a pilot signal, a preamble, a setup signal, the excitation signal and the like, the Reference signal can be used in the receiver for different purposes, for example to assess the characteristics of the channel coherent demodulation, measuring the quality of the channel, measuring the power level of the signal, etc. In the table 1 lists some of the reference signals that can be transmitted in the descending line in the ascending line, and a brief description of each reference signal. The reference signal of the cell may also be referred to as a common pilot signal, the broadband pilot signal and other signal equipment UE may also be referred to as the selected reference signal.

Table 1
LineAbout the priori signal Description
DescendingThe reference signal of the cellThe reference signal transmitted by Node B and used equipment UE to estimate the characteristics of the channel and measuring the quality of the channel.
DescendingThe reference signal equipment UEThe reference signal transmitted by the Node B for specific equipment UE and used for demodulation downstream transmission from Node C.
RisingSounding reference signalThe reference signal equipment UE and the Node B to estimate the characteristics of the channel and measuring the quality of the channel.
RisingThe reference signal for demodulationThe reference signal equipment UE and the Node B for demodulation of the ascending transmission equipment UE.

The system can use duplex mode split time (TDD). In a variant of TDD descending and ascending lines share the same frequency range or channel so that the transmission and the descending and ascending lines pass in one the e spectrum of frequencies. Characteristics of the descending channel line can be correlated with the characteristics of the channel upward. The principle of reciprocity may allow to estimate the channel characteristic of the descending line on the basis of the transmission in the ascending line. These ascending transmission may present with a reference signal or bottom-up control channels (which can be used as reference characters after demodulation). Ascending transmission can afford to appreciate the characteristic spatial-selective channel through multiple antennas.

In a duplex system, the TDD channel reciprocity can only take place over the radio channel, which can also be called a physical channel signal propagation. There may be a noticeable difference between the characteristics or transfer function of the transmitting and receiving channels in the Node B and the characteristics of the transmitting and receiving paths in the apparatus UE. Effective/equivalent channel can be composed of transmitting and receiving channels, and a radio. This effective channel may not be mutual because of the difference in the characteristics of the transmitting and receiving paths of the Node B and equipment UE.

Figure 2 shows the block diagram of the transmitting and receiving paths of the Node B 110 and equipment UE 120, which may correspond to one of the Nodes B and one of the units, the unit is s UE 1. For the descending line in the node B, the output symbols (denoted by xD) can be processed in the transmitting tract 210 and transmitted via the antenna 212 and forth via radio with the characteristic h. In the apparatus of this UE downlink signal may be received by antennas 252 and processed in the receiving path 260 to obtain received symbols (denoted by yD). Processing in the transmitting tract 210 may include a digital-to-analog conversion, amplification, filtering, converting up the frequency, etc. of the Processing in the receiving path 260 may include a down conversion frequency, amplification, filtering, analog-to-digital conversion, etc.

For uplink equipment UE output symbols (denoted by xU) can be processed in the transmitting tract 270 and transmitted via antenna 252 and forth over the air. In these ascending Node B signals may be received by antennas 212 and processed in the receiving path 220 to obtain the received symbols (denoted by yU).

For the descending line of the received symbols in equipment UE can be expressed as:

yD=σhtxD=hDxD, what is (4)

where τ is the complex gain of the transmitting tract 210 in the Host,

σ - complex coefficient preneprijatnaja tract 260 equipment UE, and

hD=σ·h·τ - effective downlink channel from the Node B to the equipment UE.

For ascending line of the received symbols in the Node B can be expressed as:

yU=ρhπxU, what is (5)

where π is the complex gain of the transmitting tract 270 equipment UE,

ρ is the complex gain of the receive path 220 in the Node, and

hU=ρ·h·π - efficient ascending channel from equipment UE to the Node B.

As shown in equations (4) and (5), we can assume that the channel h is mutual from the point of view of the descending and ascending lines. However, the effective uplink channel may be relatively effective non-descending channel. It is desirable to know the characteristics of the transmitting and receiving paths and their impact on the degree of accuracy of assumptions about reciprocity effective top-down and bottom channels. Moreover, the Node B and/or equipment UE may be equipped with antenna R is a brush, where each antenna can have its own transmission/reception paths. Transmission/reception paths for different antennas may have different characteristics, so that may be performed to calibrate the antenna array to account for this difference characteristics.

In General, the calibration can consider two types of mismatches occurring in antenna arrays:

- The error due to the physical design of the antenna system - these errors include the effects of mutual coupling between antennas, the influence of the antenna mast, the inaccurate knowledge of the location of the antennas, the error amplitude and phase due to the influence of antenna cables, etc. and

- The error caused by hardware transmit/receive paths for each antenna - these errors include analog filters, balanced in-phase (I) and quadrature (Q)phase errors and gain low-noise amplifiers (LNA (LNA)and/or power amplifiers (PA) in the transmit paths, various nonlinear effects, etc.

Calibration can be done so that the characteristic of the channel in one line can be assessed by measuring the reference signal transmitted in the other line. During calibration, you can also consider switching antennas uplink, which can be used to achieve explode when s is the transfer in the uplink, if the equipment UE is equipped with two antennas, two receiving paths, but only one receiver channel. Switching antennas in the uplink can be used to implement explode when the transfer switching time (TSTD) or selective explode during transmission (STD). Bottom-up signals can be transferred (i) alternately through the two antennas in the TSTD mode or (ii) through the best antenna mode STD. Mode STD equipment UE may transmit a sounding reference signal (SRS) alternately through the two antennas, so that the Node B can choose the best antenna. High-frequency (RP) switch can support the TSTD mode or STD by connecting the output of amplifier RA with only one of the two antennas in each moment of time.

Forming a pattern in duplex mode with split time (TDD) can be supported as follows. Unit equipment UE operating in the mode of formation of the pattern, may be configured to transmit a sounding reference signal in the uplink. In symmetric scenarios mutual descending and ascending lines, the Node B can calculate predatious matrix for use in formation of a pattern for each piece of equipment UE based on the sounding reference signals received from this unit equipment UE. That is they way units equipment UE does not need to pass predatious information to the Node B, which may allow you to avoid mistakes feedback. The node B may transmit the reference signal equipment UE down the line for each piece of equipment UE. The Node B may predozirati reference signal equipment UE using the same prekodira matrix, which is used when transferring data, and to transmit precociously reference signal in each resource block used for transmission. Equipment UE can use this precociously reference signal for demodulation, so she may not need the knowledge prekodira matrix used in the Node C. It can afford to do without transmission indicator prekodira matrix (PMI) downstream equipment UE.

The procedure of forming the pattern can be simplified for the symmetric and asymmetric scenarios when mutual descending and ascending lines. Here you can calibrate to determine the calibration vector, able to take into account differences in the characteristics of the transmitting and receiving channels to make the downward channel is reciprocal relative to the upward channel.

The calibration procedure may be initiated by the Node B and conducted with the participation of the group of units of equipment UE. The following description implies the t, that the transmitting and receiving paths of the Node B and station apparatus UE have flat characteristics in the group of several consecutive subcarriers for each transmitting antenna, a band coherence is equal to the number of subcarriers assigned to each transmitting antenna for sensing. This allows us to obtain the characteristic of the channel based on the reference signal.

Figure 3 shows the block diagram of the Node B and N stations equipment UE 1 to N for calibration. Node B has M transmitting paths with 310a on 310m for M antennas with a on 312m, respectively. In General, each piece of equipment UE may have one or more antennas. For the purposes of calibration of each antenna this unit equipment UE can be considered as a separate unit of equipment UE. In figure 3, each unit of equipment UE is transmitting and receiving paths 360 for one antenna 352.

For each of the first antenna Node B can determine an effective mismatch βias follows:

βi=tiρi,dlI i=1,...,M (6)

where τi- the complex gain of the transmitting path of the first antenna at the Node B, and

ρi- the complex gain of the receive path for the first antenna in Node B. For unit equipment UE j effective misalignment αjcan be defined as follows:

αj=πjσj,dlIj=1,...,N (7)

where πi- the complex gain of the transmitting tract for unit equipment UE j, and

σi- the complex gain of the receiving circuit for unit equipment UE j.

Downward channel from the first antenna Node B to the unit equipment UE j can be denoted ashijD. Sunrise is a first channel from a unit of equipment UE j to antenna i of Node B can be denoted as hjiU. Due to the reciprocity of the TDD channel,hjiU=hijDfor all values of i and j.

It is possible to estimate the effective size mismatches with β1for βMfor M antennas of the Node B for calibration of the Node B. In this case, the calibration equipment UE may be unnecessary. However, the unit equipment UE should transmit a sounding reference signals for calibration and beam forming, as described below.

Characteristics of effective downward channelhijD,efffrom the first antenna Node B to the unit equipment UE j can be expressed as:

hijD,eff=tihijDσj. mtext> (8)

Unit equipment UE j can assess the characteristics of effective downward channel based on the reference signal of the cell transmitted from each antenna Node B in the descending line.

Characteristics of effective upward channelhjiU,efffrom unit equipment UE j to antenna i of Node B can be expressed as:

hijU,eff=πjhj/mi> iUρi./mtext> (9)

The node B may estimate the characteristics of effective upstream channel based on the sounding reference signal transmitted by the apparatus UE j upward.

The calibration factor cijfor the first antenna Node B and unit equipment UE j can be expressed:

cij=hijD,e ffhjiU,eff=tihijDσjπjhjiUρi=βiαj.the (10)

Equation (10) implies the reciprocity of the radio channel, so thathjiU=hijD.

The calibration vector Cjcan be obtained for a unit of equipment UE j, as follows:

Cj=mo stretchy="false"> [c1jc2j...cMj]=[β1/αjβ2/αj...βM/αj].mtext> (11)

The node B can be calibrated to obtain the scale factor, then the calibration vectorCjcan be defined as follows:

Cj=Cjαjβ1=[1β2/β1...βM/β1]. (12)

As shown in equation (12), the elements of the calibration vectorCjdo not depend on the index j, even though they are derived on the basis of measurement for unit apt the atmospheric temperature UE j. This means that the calibration vector applied to the Node B should not consider the error in units of equipment UE. The node B may receive the N calibration vectors withC1CNfor N units of equipment UE. The Node B can calculate the final calibration vector, as follows:

C=f(C1,C2,...,CN), mtext> (12)

where f( ) may be a function of simple averaging N calibration vectors or summation function of these N calibration vectors using a minimum mean square error (MMSE) or some other ways. If the gain channelhijDorhjiUtoo small, the calibration may be inaccurate due to increased noise. For the best summation of N calibration vectors with different noise characteristics, you can use the diagram of the MMSE calculation.

In one embodiment, calibration can be performed as follows:

1. The node B decides to calibrate and selects the N units of equipment UE with high values of the indicator of channel quality (CQI) and a relatively small Doppler shift for calibration.

2. The node B transmits these N units of equipment UE message to enter calibration mode.

3. Each piece of equipment UE measures the reference signal of the cell from each antenna Node B for the teachings assess the characteristics of effective downward channel for this dish. This unit equipment UE may select the reference signal of the cell nearest to the next transmission of a sounding reference signal of this unit of equipment UE with the time signal processing equipment UE.

4. Each piece of equipment UE transmits an assessment of the characteristics of effective downward channel for each antenna Node B back to this Site using a sufficient number of bits (for example, 6-bit quantization of the real/imaginary part), and transmits a sounding reference signal in the same time.

5. The node B measures the sounding reference signal on each antenna equipment UE to estimate the characteristics of an effective upward channel for the UE antenna and calculates the coefficient cijcalibration for each antenna Node B according to equation (10). The node B may also be a factor cijusing MMSE estimation.

6. The node B determines the calibration vectorCjfor each equipment UE according to equation (12).

7. The node B calculates the calibration vector C on the basis of the calibration vectorsCjfor all pieces of equipment UE, as shown in equation (13).

8. the green B exits the calibration mode after reaching a satisfactory calibration result.

Equipment UE may also perform calibration to obtain a calibration vector for itself. To this end, the apparatus UE may perform the calibration with one Node B at different points in time and/or with different Nodes B to improve the quality of the calibration vector.

Station (e.g., Node B or equipment UE) can receive calibration vector by performing calibration and can apply the appropriate version of the calibration vector for the transmitting side or the receiving side. When using the calibration vector can be estimated response of the channel in one line based on the reference signal received in the other line. For example, Node B can estimate the characteristic of the descending channel on the basis of a sounding reference signal received from the equipment UE in the ascending line. After that, the Node B can realize the formation of a pattern on the basis of predatious vector(s), calculated on the basis of evaluating the performance of the descending channel. Application of the calibration vector should simplify the evaluation of the characteristics of the channel and should not adversely affect the transmission characteristics of the data.

Figure 4 presents data transfer using beam forming and receiving data using calibration and without. For simplicity, figure 4 Ave is palagay, the transmitter (e.g., Node B or equipment UE) has no mismatch between transmitter and receiver paths and may be considered identical with/without calibration.

In the upper half of figure 4 shows the receiver (for example, equipment UE or Node B) without calibration. The data symbols from a transmitter predatious using matrix V of the beam forming and transmit the MIMO channel with channel matrix H. The received symbols at the receiver can be expressed as:

y=HVs+n, (14)

where s is the vector of data symbols transmitted by the transmitter,

y - vector of received symbols at the receiver, and

n is the noise vector.

The receiver may perform MIMO detection using the matrix W, the spatial filtering as follows:

wherethe vector of detected symbols, which are an estimate of s.

The matrix W, the spatial filtering can be defined using the MMSE as follows:

W=VHHH[HHH+Ψ] -1, (16)

where Ψ=E[nnH] the covariance matrix of noise in the receiver,

E[] means the wait and

“H”denotes conjugate transpose.

In the lower half of figure 4 shows the receiver calibration. The received symbols at the receiver can have the form shown in equation (14). The receiver may perform MIMO detection using the matrix Wcspatial filtering as follows:

where C is the calibration matrix in the receiver, and- evaluation s. The calibration matrix C is a diagonal matrix and the diagonal elements of the matrix C can be equal to the elements of the calibration vector of the receiver.

The matrix Wcspatial filtering can be obtained using the MMSE algorithm in the following way:

Wc=VHHH[HHH+Ψ]-1C-1. (18)

As shown by equations (17) and (18), p is obtained by applying algorithm MMSE matrix W cspatial filtering tries to decompose a complex channel Hc=CH, with the covariance matrix of the colored noise Σ=CΨCH. If the receiver used MMSE detector, the detected symbols from the receiver calibration is equal detectionin symbols from the receiver without calibration.

Phase receiving antennas do not affect the characteristics of the transmission, using the formation of the pattern. However, when forming the pattern, consider the relative power of different transmission antennas equipment UE, as well as the detuning of the gain in the receiving paths of the units of this equipment UE.

Figure 5 shows the block diagram of the equipment UE 110 with K antennas with 552a on 552k, where K can be any number greater than 1. With these K antennas with 552a on 552k connected K receive paths with 560a on 560k, respectively, and K transmitting circuits with 570a for 570k, respectively.

Equipment UE can perform automatic gain control (AGC) in each receiving path 560 and may adjust the gain in each receiving channel so that the variance of the noise in all K foster paths were approximately equal. Equipment UE can use AGC gain gain g1on gKfor K receive paths with 560a on 560k, respectively. These factors AGC gain could the t be different for different antennas and may change periodically. Equipment UE may be able to accurately measure the gain of the AGC system for each antenna based on the results of measurements of the power level of the received signal in the antenna.

In one design equipment UE may determine the relative gain of the receiver for each antenna k in the following way:

rk=gkg1,dlIk=1,...,K,the mtext> (19)

where rkthe relative antenna gain k in equipment UE.

In one embodiment, the apparatus UE may transmit data about the relative gains of the receiving Node B, which can take into account these relative factors in the formation of the pattern. For example, the Node B can determine the composite channel matrix HDthe downward MIMO channel as follows:

HD=RH (20)

where R is the diagonal matrix with on the diagonal which are K relative gain with r1for rKreceiver. The node B may perform the decomposition on special values for this composite channel matrix HDthe downward MIMO channel (instead of the matrix H downward MIMO channel) to obtain prekodira matrix V.

In another embodiment, the apparatus UE may apply the appropriate gain in the transmit paths when passing zones is arousih reference signals, to Node B can obtain an estimate of the composite channel matrix HDthe downward MIMO channel instead of the channel matrix H downward MIMO channel. Equipment UE may scale the gain of the transmitting path for each antenna k in accordance with a relative gain of rkreceive path for this dish. For example, if the relative gain of the receive path for the antenna equal to 1.5, equipment UE may scale the gain of the transmitting link for this antenna with a coefficient of 1.5.

As shown in figure 5, the equipment UE can have amplification coefficients with p1pKpower amplifiers (PA) for K transmitting circuits with 570a for 570k, respectively. Equipment UE may have known the gain imbalance in the transmission paths and/or antennas. For example, one of the transmitting circuits may have a lower power amplifier RA, other than the transmitting tract. In another example, may be different gains of the two antennas, for example due to differences in types of antennas. Equipment UE may determine the relative gain of the transmitting path for each antenna k in the following way:

tk=akpka1p1,dlIk=1,...,K,what is (21)

where ak- gain antenna k in equipment UE,

pk- gain amplifier RA in the transmitting tract of the antenna k in equipment UE, and

tkthe relative gain of the transmitting link for antenna k in equipment UE.

This relative gain of the transmitting tract tkusually equal to 1, it may be different from 1 because of the presence of detuning of the gain in the transmit paths and/or the antenna apparatus UE.

In one embodiment, the apparatus UE may report the known imbalance gain the Node B, for example, in the phase of identifying opportunities. The node B may take into account known unbalance amplification equipment UE during calibration and beam forming. For example, the Node B may obtain an estimate of the composite channel matrix HUrising MIMO channel based on the sounding reference signals received from the equipment UE. This matrix HUcan be expressed:

HU=HHT, mtext> (22)

where T is the diagonal matrix with on the diagonal which are K relative gain transmission with t1for tK. The node B may then exclude the matrix T to obtain the matrix H of the MIMO channel.

In another embodiment, the apparatus UE may apply the appropriate gain in the transmission path during the transmission of sounding reference signals, so that the Node B can obtain an estimate of the channel matrix H of the MIMO channel instead of the composite channel matrix HUrising MIMO channel. Equipment UE may scale the gain of the transmit path of each antenna k by multiplying by the reciprocal of the relative coefficient tkstrengthening of transmission for this dish. For example, if the relative gain of the transmission for this antenna is equal to 2.0, then the equipment UE may scale the gain of this transmitting tract with a factor of 0.5.

In the General case, the Node B and/or equipment UE can consider the difference of the coefficients of the AGC gain between different receiving paths, the difference of the gains of the amplifiers RA between different transmission paths and/or the difference of the gain between different antennas antennas equipment UE. Transmission of sounding reference signals at low power may affect the quality assessment of the characteristics of the channel. In the case of small amplifiers RA may not be able to transmit signals at higher power due to loss of power. In such cases, the equipment UE can transmit to Node B, the data about the relative gains of the reception and/or transmission instead of considering these data in the equipment UE.

In one embodiment, the formation of the pattern may occur as follows.

1. Node B calibrates itself as often as necessary (for example, in each calibration interval of 1 hour or more), using the calibration procedure described above, to obtain a calibration vector for the Node B.

2. For a given unit of equipment UE Node B weighs the gain of each antenna equipment UE by multiplying the relative gain of tkthe transfer for this antenna (if any) to account for the known offset of the amplification equipment UE.

3. Equipment UE applies the relative gain rkreception during transmission of sounding reference signals through its antenna as feedback in the formation of the pattern. In an alternative embodiment, the apparatus UE may report data on the relative gain of the receiving Node B, which may account for these who otnositelnye factors.

4. The node B uses the calibration vector and possibly the relative gain of the reception and/or transmission for beam forming in the direction of the equipment UE.

Predatious vectors for beam forming can be valid until the next change of the gain of the AGC equipment UE. Equipment UE may transmit information about the imbalance of the gain in the receiving paths, the transmission paths and/or the antennas of this equipment UE may together with indicators of the quality of the CQI channel when changes occur such offset.

Figure 6 shows a variant of a process 600 for performing a calibration Node B. the Node b may periodically to calibrate each calibration interval to obtain a calibration vector for this node (block 612). The calibration interval may be of any suitable duration, for example 1 hour or more. The node may form a pattern, at least for one unit of equipment UE in each calibration interval, and may apply the calibration vector obtained for this calibration interval (block 614).

7 shows a variant of a process 700 for performing a calibration Node In each calibration interval. Process 700 may be implemented in block 612 on figue can select a group of units of equipment UE to perform calibration, for example on the basis of indicators of channel quality (CQI)received from these pieces of equipment UE (block 712). The node may send messages to the equipment UE in the group to enter the calibration mode (block 714). The node may accept the assessment of the characteristics of the descending channel from each unit of equipment UE (block 716) and may also take at least one sounding reference signal, at least one antenna of this equipment UE (block 718). The node can calculate the estimate of the characteristics of the upward channel for each unit of equipment UE based on the at least one sounding reference signal received from this unit equipment UE (block 720). The node can calculate at least one initial calibration vector for each unit of equipment UE based on the estimated characteristics of top-down and bottom channels for this unit equipment UE (block 722). The node can then calculate the calibration vector for himself on the basis of the initial calibration vectors for all pieces of equipment UE in the group (block 724).

For each equipment UE evaluation of the characteristics of the descending channel may contain at least one vector of the descending channel, at least one antenna of this equipment UE. Evaluation of the characteristics of the upward channel may contain at least one century is the PR of the upward channel, at least one antenna of this equipment UE. Each vector of the descending channel can contain multiple first gain (for example,hijD,efffor multiple antennas at the Node C. Each vector of the upward channel can contain multiple second gain (for example,hijU,efffor multiple antennas at the Node C.

Initial calibration vectorCjcan be calculated for each antenna equipment UE on the basis vectors downward and upward channels for this antenna are as follows. Several elements (for example, cij) non-normalized calibration vectorCjfor the j antenna equipment UE may be determined based on the relationship of several of the first amplification coefficients in the vector downstream channel to multiple second amplification coefficients in the vector vos is tamago channel for the j antenna equipment UE, for example, as shown in equation (10). These few elements normalized calibration vectors can be scaled through the first element to obtain an initial calibration vectorCjfor the j antenna equipment UE, for example as shown in equation (12). The calibration vector for the Node B can be calculated in function of the initial calibration vectors for all pieces of equipment UE in the selected group. This may be a function of the averaging function MMSE etc.

On Fig shows the structure of a device 800 for calibration. The device 800 includes a module 812 for periodic calibration each calibration interval in order to obtain a calibration vector for the Node B and the module 814 for beam forming at least for one unit of equipment UE in each calibration interval and applying the calibration vector, obtained in the calibration interval.

Figure 9 presents the structure of the process 900 of forming a pattern in the Node B. the Node B may determine predatious matrix given offset gains for multiple antennas equipment UE (block 912). After that, the Node B may form diagra the mu orientation for this equipment UE using prekodira matrix (block 914).

According to one of the scenarios, the Node B can determine predatious matrix taking into account the offset of the gain due to the difference of the coefficients of the AGC gain for multiple receive paths of multiple antennas equipment UE. In the General case, the gain of AGC can include any adjustable gain in the receiving path. In one embodiment, the Node B may receive at least one relative gain of rkfrom equipment UE, so that each of these relative factors is determined by the gain gkAGC for the corresponding antenna gain g1AGC for the antenna of this equipment UE. The node B may determine the composite channel matrix HDon the basis of the channel matrix H for equipment UE and the matrix R gain, constructed using at least one of the relative gain. Then the Node B may determine predatious matrix based on the composite channel matrix. In another embodiment, the Node B may receive a sounding reference signals from multiple antennas equipment UE. Each sounding reference signal may be transmitted by the equipment UE through a single antenna with a power level determined based on the relative gain rkfor this dish.

According to the other the WMD scenario, the Node B can determine predatious matrix taking into account the offset of the gain due to (i) differences gain in the amplifiers RA in multiple transmission paths of multiple antennas equipment UE, and/or (ii) the difference of the gain of these antennas. In the General case, the gain of the amplifier RA may include any adjustable gain in the transmitting tract. In one embodiment, the Node B may receive at least one relative gain of tkfrom equipment UE, so that each of these relative factors is determined by the gain of the pkpower amplifier RA for the corresponding antenna and the gain of the p1power amplifier RA for the reference antenna equipment UE. Then the Node B may determine predatious matrix based on the specified at least one of the relative gain. In another embodiment, the Node B may receive a sounding reference signals from multiple antennas equipment UE. Each sounding reference signal may be transmitted by the equipment UE through a single antenna with a power level determined based on the relative gain tkfor this dish.

Figure 10 presents the design of a device 1000 for beam forming. The device includes a module 1012 to determine prekodira matrix Node In taking into account the offset of the gain between multiple antennas of the apparatus UE, and a module 1014 formation chart example is lennosti for this equipment UE using prekodira matrix.

Figure 11 presents a diagram of a process 1100 for receiving data equipment UE in accordance with the generated pattern. Equipment UE can determine the imbalance of the gain for several antennas (block 1112). Then the equipment UE may transmit signals or information about the terms of the imbalance gain between multiple antennas of the Node B (block 1114). After that, the equipment UE may receive signals in accordance with the generated pattern from the Node B, so that these signals are obtained on the basis of prekodira matrix, calculated with respect to the detuning of the gain between multiple antennas equipment UE (block 1116).

According to one of the scripts equipment UE may determine at least one relative gain of rkfor several antennas, so that each of these relative factors is determined by the gain of the AGC for the corresponding antenna and the gain of the AGC for the antenna of this equipment UE. According to another scenario equipment UE may determine at least one relative gain of tkfor several antennas, so that each of these relative factors is determined by the gain of the amplifier RA for the corresponding ante the us and the gain of the amplifier RA for the reference antenna equipment UE. In both scenarios, in one embodiment, the apparatus UE can transmit at least one relative gain to the Node B. In another embodiment, the apparatus UE may transmit a sounding reference signals from several antennas, so that each sounding reference signal may be transmitted by one antenna with a power level determined based on the relative gain of this antenna.

On Fig presents the structure of the device 1200 for receiving data in accordance with the generated pattern. The device 1200 includes a module 1212 to determine the offset of the gain between multiple antennas equipment UE, a module 1214 to transmit signals or information gain imbalance between multiple antennas of the Node B and the module 1216 to receive signals in accordance with the generated pattern from the Node B, so that these signals are obtained on the basis of prekodira matrix, calculated with respect to the detuning of the gain between multiple antennas equipment UE.

Modules on Fig, 10 and 12 may include processors, electronic devices, hardware, electronic components, logic circuits, memory devices, etc. or any combination of the listed components and devices.

On Fig shows the block diagram of the structure of the URS Node B 110 and equipment UE 120, which can be a one of the Nodes B and one of the instruments UE shown in figure 1. Node B 110 is equipped with multiple (T) antennas with a on 1334t. Equipment UE 120 is equipped with one or multiple (R) antennas with a on 1352r.

At Node B 110, the processor 1320 may receive data for one or more units of equipment UE from the source 1312 data processing (e.g., encode and modulate) the data for each unit of equipment UE based on one or more modulation and coding for this equipment UE, and to generate data symbols for all pieces of equipment UE. The processor 1320 may generate the symbols of the control information transmission/alarm. This processor 1320 may further generate reference symbols for one or more reference signals, such as reference signals to the cell. The processor 1330 MIMO can perform predatirovaniya of data characters, control characters and/or the reference symbols, and can generate tons of output streams of symbols to T modulators (MOD) with 1332a on 1332t. Each modulator 1332 may process its output symbol (e.g., for OFDM) to obtain output samples. Each modulator 1332 may further condition (e.g., convert to analog form, to filter, amplify and convert up in frequency) its echodnou stream of samples and to generate a downlink signal. These T downlink signals from modulators 1332a on 1332t can be transmitted via antennas with 1334a on 1334t, respectively.

Equipment UE 120, R antennas a on 1352r can take these T downlink signals from Node B 110, so that each antenna 1352 may transmit the received signal to the respective demodulator (DEMOD) 1354. Each demodulator 1354 may condition (e.g., filter, amplify, convert down the frequency and discretize) its received signal to obtain samples and may further process these samples (e.g., for OFDM) to obtain received symbols. Each demodulator 1354 may transfer the received data symbols and the received symbols in the detector 1360 MIMO and can transmit the received reference symbols to a channel processor 1394. This channel 1394 processor can evaluate the characteristic of the descending channel from the Node B 110 to the equipment UE 120 based on the received reference symbols and transmit this characteristic of the descending channel detector 1360 MIMO. This detector 1360 MIMO may perform MIMO detection for the received data symbols and received symbols based management evaluation of the characteristics of the descending channel and to generate a detected symbols. The processor 1370 reception can handle (e.g., demodulate and decode) the detected symbols to transmit the decoded data needs is the tel 1372 data and transmit the decoded control information to a controller/processor 1390.

Equipment UE 120 may estimate the quality of the descending channel and to generate a quality indicator CQI channel and/or other information feedback. This information feedback data from the source 1378 data and one or more reference signals (e.g., sounding reference signals) may be processed (e.g., encoded and modulated) by the processor 1380 transmission, predictionary processor 1382 MIMO and further processed in modulators with 1354a on 1354r to generate R bottom-up signals that may be transmitted via antennas with 1352a on 1352r. At Node B 110 these R the ascending signals from equipment UE 120 may be received by antennas with 1334a on 1334t and processed by demodulators with 1332a on 1332t. Channel processor 1344 can evaluate the characteristic of the upward channel from the apparatus 120 UE to the Node B 110, and may transmit the evaluation of the upward channel detector 1336 MIMO. This detector 1336 MIMO may perform MIMO detection on the basis of an assessment of the characteristics of the rising channel and to generate a detected symbols. The processor 1338 reception can process the detected symbols to transmit the decoded data to the consumer 1339 data and transmit the decoded information feedback to the controller/processor 1340. The controller/processor 1340 may control the data transmission apparatus UE 120 based on the feedback information.

To trollery/processor 1340 and 1390 can control the operation of the Node B 110 and equipment UE 120, respectively. The controller/processor 1340 Node B 110 may perform or control execution of process 600 according to Fig.6, the process 700 according to Fig.7, the process 900 according to figures 9 and/or other processes that implement the described methods. The controller/processor 1390 equipment UE 120 may perform or control execution of the process 1100 according to 11 and/or other processes that implement the described methods. Storage device 1342 and 1392 can save the data and code for Node B 110 and equipment UE, respectively. The scheduler 1346 may choose station apparatus UE 120 and/or other station UE for data transmission in a downward and/or upward direction on the basis of feedback information received from the equipment UE. The scheduler 1346 may also allocate resources to the planned stations equipment UE.

Specialists in this field should understand that information and signals may be represented using any of a variety of different technologies and methods. For example, data, instructions, commands, information, signals, bits, symbols and packages that can be referenced throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination of these factor is.

Specialists in this field should also recognize that the various illustrative logical blocks, modules, circuits, and steps of the algorithms considered in connection with the above description may be implemented as electronic hardware, computer software, or a combination of hardware and software. For greater clarity illustrate this interchangeability of hardware and software, various illustrative components, blocks, modules, circuits, and steps have been described above in General terms of their functionality. Will this functionality is implemented in either hardware or software depends on the particular application and design constraints imposed on the entire system. Qualified developers can implement the described functions in different ways for each particular application, but such design decisions should not be interpreted as causing deviations from the scope of the present invention.

The various illustrative logical blocks, modules, and circuits discussed here in connection with the present invention may be implemented or performed using General-purpose processor, a digital signal processor (DSP), a specialized integrated circuit (ASIC), about Ramaswamy user gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete components, equipment, or any combinations thereof, designed to perform the described functions. General-purpose processor may be a microprocessor, but in alternative embodiments, such a processor may be a conventional processor, controller, microcontroller, or state machine. The processor may also be implemented as a combination of computing devices, such as a combination of a digital processor (DSP) and microprocessor, multiple microprocessors, one or more microprocessors in conjunction with core digital processor (DSP) or any other such configuration.

The stages of a method or algorithm described in connection with the present invention, can be implemented directly in hardware, in a software module executed by a processor, or combinations thereof. A software module may reside in memory with random access (NVR (RAM), flash memory, read-only memory (ROM), erasable PROM (EPROM (EPROM)), electrically programmable erasable EPROM (EEPROM (EEPROM), registers, hard disk drive, floppy, CD-ROM or any other suitable storage device known in the art. An example of such a recording medium connected to the processor so that the processor can is t to read information from and write information to the media. The processor and the storage medium may be implemented in one of the specialized integrated circuit (ASIC). Such ASIC may reside in a user terminal. In an alternative embodiment, the processor and the storage medium may be located in discrete components in a user terminal.

In one or more examples of the described functions may be implemented in hardware, in the form of alternate programs, in the form of firmware or a combination of hardware and software. In a variant of the affected programs, these functions may be recorded or transmitted in the form of one or more instructions or programs on a machine-readable carrier. Machine-readable media includes computer storage medium and the communication environment, including any environment, allowing you to transfer a computer program from one place to another. As the recording media can be any available media that can apply for and get access to a computer or special purpose. As an example, but not limitation, such computer-readable media can include RAM, ROM, EEPROM, CD-ROM or other optical drive, the drive on magnetic disks or other magnetic storage device, or any other medium that can be used to transfer or Mor is anene the desired program in the form of instructions or data structures and which can address and access the computer of a General or special purpose, or the processor of a General or special purpose. In addition, any connection may also be called a machine-readable carrier. For example, if the software is delivered from a website, server, or other remote source using a coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared radiation, radio waves or microwave radiation, then the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technology, such as infrared radiation, radio waves or microwave radiation is included in the definition of the media. Apply here the concept of disks include compact discs (CDS), laser disks, optical disks, digital versatile disks (DVD), a magnetic floppy disks and drives, Blu-ray, and in English writing disks usually reproduce data magnetically, a discs reproduce data optically with lasers. Combinations of the above types of memory and of the recording media should also be included in the concept of machine-readable media.

The preceding description of the invention is designed so that any person skilled in the art can implement or use the invention. Various modifications of the invention under examination can be easy to understand what are the obvious expert, while the General principles set forth herein may be applied to other options, not deviating from the spirit or scope of the invention. Thus, the invention should not be limited to these examples and structures, but must conform to the widest extent consistent with the principles and novel traits described here.

1. Way radio communications, comprising:
periodic calibration each calibration interval, in order to obtain a calibration vector for a Node V, with periodic calibration contains a select group of user equipment UE to perform the calibration, and the group of user equipment UE is chosen on the basis of indicators of channel quality (CQI)received from these instruments UE; and
forming a pattern of at least one user equipment (UE) in each calibration interval, and applying the calibration vector obtained for this calibration interval, which is executed periodically calibrate contains, in each calibration interval,
calculating at least one initial calibration vector for each equipment UE in the group, and
the calculation of the calibration vector for the Node based on the initial calibration vectors for all instruments of UE the selected group.

2. The method according to claim 1, wherein calculating at least one initial calibration vector for each equipment UE includes receiving evaluating the performance of the descending channel from this equipment UE,
receiving at least one sounding reference signal from at least one antenna of this equipment UE,
the calculation of the evaluation characteristics of the upward channel for this equipment UE based on the at least one sounding reference signal received from this equipment UE, and
calculating at least one initial calibration vector for the specified equipment UE based on the evaluation of the characteristics of the descending channel and evaluate the characteristics of the upward channel.

3. The method according to claim 2, characterized in that the evaluation of the characteristics of the descending channel contains at least one vector of the descending channel, at least one antenna equipment UE, the fact that the evaluation of the characteristics of the upward channel contains at least one vector of the upward channel, at least one antenna apparatus UE, and the fact that the calculation of at least one initial calibration vector for equipment UE contains the calculation of the initial calibration vector for each antenna specified equipment UE based on the vector of the descending channel and the vector of rising to the Nala for this dish.

4. The method according to claim 3, wherein each vector of the descending channel contains the first few gains for multiple antennas at the Node B, so that each vector of the upward channel has several second amplification coefficients for the multiple antennas at the Node B, and the fact that the calculation of the initial calibration vector for each antenna equipment UE contains
determination of several elements of the non-normalized calibration vector based on the first few gains to more than the second gain, and
scaling multiple items of non-normalized calibration vector by multiplying the first component, with the aim of obtaining the initial calibration vector for the specified antenna equipment UE.

5. The method according to claim 1, characterized in that the calculation of the calibration vector for the Node b includes the calculation of the calibration vector for the Node based on the initial calibration vectors for all instruments UE in the selected group, so that this function can be a function of averaging or function of the minimum mean square error (MMSE).

6. The method according to claim 1, characterized in that the periodic calibration contains next, for each calibration interval, message passing instruments UE in the selected group for p is the transfer in the calibration mode.

7. Device for radio communication, comprising:
at least one processor configured to periodically perform calibration each calibration interval, in order to obtain a calibration vector for a Node V, with periodic calibration contains a select group of user equipment UE to perform the calibration, and the group of user equipment UE is chosen on the basis of indicators of channel quality (CQI)received from these instruments UE, and for beam forming at least one user equipment (UE) in each calibration interval and applying the calibration vector obtained for this calibration interval, in which for each calibration interval specified at least one processor configured to calculate at least one initial calibration vector for each equipment UE in the group, and to calculate the calibration vector for the Node based on the initial calibration vectors for all instruments UE in the selected group.

8. The device according to claim 7, characterized in that for each equipment UE in the group specified at least one processor configured for receiving, evaluating the performance of the descending channel from this equipment UE, receiving at least odnoglazovogo reference signal, at least one antenna of this equipment UE, calculating, evaluating the performance of the upward channel for this equipment UE based on the at least one sounding reference signal received from this equipment UE, and calculating at least one initial calibration vector for the specified equipment UE based on the evaluation of the characteristics of the descending channel and evaluate the characteristics of the upward channel.

9. Device for radio communication, comprising:
means for periodic calibration each calibration interval, in order to obtain a calibration vector for the Node In which the means for periodic calibration contain a means for selecting a group of user equipment UE to perform calibration, in this case a group of user equipment UE is chosen on the basis of indicators of channel quality (CQI)received from these instruments UE; and
means for beam forming at least one user equipment (UE) in each calibration interval and applying the calibration vector obtained for this calibration interval in which the means for periodic calibration contain in each calibration interval,
means for calculating at least one initial kalibrovochnoj the vector for each equipment UE in the group, and
means for calculating a calibration vector for the Node based on the initial calibration vectors for all instruments UE in the selected group.

10. The device according to claim 9, characterized in that the means for calculating at least one initial calibration vector for each equipment UE contain
means for receiving, evaluating the performance of the descending channel from this equipment UE,
means for receiving at least one of the probing signal, at least one antenna of this equipment UE,
means to calculate estimates of the characteristics of the upward channel for this equipment UE based on the at least one sounding reference signal received from this equipment UE, and
means for calculating at least one initial calibration vector for the specified equipment UE based on the evaluation of the characteristics of the descending channel and evaluate the characteristics of the upward channel.

11. Machine-readable media containing:
the program under which the at least one computer periodically performs a calibration each calibration interval, in order to obtain a calibration vector for the Node In which the program under which the at least one computer periodically performs a calibration, contains a program group selection Gabon is niskich instruments UE to perform calibration, in this case a group of user equipment UE is chosen on the basis of indicators of channel quality (CQI)received from these instruments UE, while periodically perform calibration contains, in each calibration interval,
calculating at least one initial calibration vector for each equipment UE in the group, and
the calculation of the calibration vector for the Node based on the initial calibration vectors for all instruments UE in the selected group; and
the program under which the at least one computer generates a pattern of at least one user equipment (UE) in each calibration interval and applies the calibration vector obtained for this calibration interval.



 

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2 cl, 2 dwg

FIELD: physics, communications.

SUBSTANCE: invention concerns data transfer, particularly frequency-time-space block coding in a transmitter with three transmitting Tx antennae. Input symbol sequence is transferred by three Tx antennae according to permutation method via selected transmission matrix.

EFFECT: increased data transfer speed.

28 cl, 10 dwg

FIELD: physics; communications.

SUBSTANCE: present invention pertains to communication techniques. The transmitting object carries out spatial processing using control matrices, so that data transmission is held in a set of "effective" channels, formed on the real channel used for transmitting data, and control matrices, used for PRTS. Control matrices can be formed by sampling a base matrix, which can be a Walsh or Fourier matrix. Different combinations of scalars are then chosen, each combination of which consists of at least one scalar, of at least row of the base matrix. Each scalar can be a real or complex value. Different control matrices are formed by multiplying the base matrix by each of the different combinations of scalars. Control matrices are different transpositions of the base matrix.

EFFECT: generation and use of control matrices for pseudorandom transmission control (PRTS).

55 cl, 3 dwg, 1 tbl

FIELD: physics.

SUBSTANCE: invention is related to device and method for beams shaping in telecommunication system of mobile communication CDMA with application of intellectual antennas technology, using specified device and method, multiple fixed beams are shaped in sector, and multiple fixed beams are used to shape traffic channel with narrow beams and common channel with sector beams in one and the same intellectual antenna system, and problem of phases discrepancy is solved in appropriate channels due to differences in time and temperature oscillations without application of complicated correcting technology. Since fixed beams in some area correlate and interact with each other, or considerably weaken due to correlative summation of space vectors of every fixed beam in process of common channels transfer in CDMA system with multiple antennas, then appropriate ratio is established between power of pilot channel and traffic channel in coverage area, and signal-noise ratio is increased for signals received by mobile communication station. As a result of addition of optical transceivers system between system of the main frequency band and system of radio frequency transceivers (TRX), the main frequency band system services more sectors. Radio frequency unit is located in close proximity to antennas, and consumed power is reduced accordingly.

EFFECT: increased throughput capacity and efficiency of CDMA system with multiple antennas.

15 cl, 6 dwg

FIELD: information technologies.

SUBSTANCE: separation of transmitting antennas with feedback is applied to special channel of downstream communications line, and separation of transmitting antennas without feedback is applied to control channel of downstream communications line in accordance with high-efficiency method of transmission over upstream communications line. The objective of present invention is to determine how the station with separation during transmission which implements advanced upstream communications line (EUL) should apply separation of transmitting antennas to level 1 confirmation information transmission channels (E-HICH), relative transmission rate channels (E-RGCH) and absolute transmission rate channels (E-AGCH).

EFFECT: providing communications system stability and reliability.

9 cl, 15 dwg

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