CN101087169B - Linear pre-coding method and device of TDD system - Google Patents

Linear pre-coding method and device of TDD system Download PDF

Info

Publication number
CN101087169B
CN101087169B CN 200610087109 CN200610087109A CN101087169B CN 101087169 B CN101087169 B CN 101087169B CN 200610087109 CN200610087109 CN 200610087109 CN 200610087109 A CN200610087109 A CN 200610087109A CN 101087169 B CN101087169 B CN 101087169B
Authority
CN
Grant status
Grant
Patent type
Prior art keywords
state information
channel state
linear
user terminal
precoding
Prior art date
Application number
CN 200610087109
Other languages
Chinese (zh)
Other versions
CN101087169A (en )
Inventor
孙韶辉
王映民
索士强
Original Assignee
上海原动力通信科技有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Grant date

Links

Abstract

The invention provides a linear pre-coding method of TDD system, which includes following step: receives the pilot frequency symbol corresponding with user terminal, and extracts the state information of channel according to the no pre-coding pilot frequency symbol and stores it; chooses the state information of channel which can satisfy the pre-condition from the stored state information of channel for user terminal which will execute linear pre code, and calculates the linear pre-coding matrix according to state information of channel, and then do linear pre-coding operation for data symboland pilot frequency symbol using the linear pre-coding matrix. Additionally, the invention also provides device to realize said method. The invention obtains the state information of channel according to the ascending and descending channel of TDD system, and judges the reliability, and gets the dependable state information of channel to do the calculation of linear pre-coding matrix and the operation of linear pre-coding to reach the aim of simplification operation.

Description

TDD系统的线性预编码方法及装置 Linear precoding method and apparatus for a TDD system

技术领域 FIELD

[0001] 本发明涉及移动通信技术,尤其涉及一种TDD系统的线性预编码方法及装置。 [0001] The present invention relates to mobile communication technologies, particularly to a TDD system, method and apparatus for linear precoding. 背景技术 Background technique

[0002] 所谓的线性预编码方法是指:当发射端存在多根发射天线时,可以通过一个线性的预编码(pre-coding)操作将多个数据流映射到多根天线上。 [0002] The so-called linear pre-coding method refers to: when there are multiple transmit antennas transmitting end, a plurality of data flow may be mapped to multiple antennas via a linear pre-coding (pre-coding) operation. 假设天线的个数为M,数据流的个数为L,当数据流的数目L等于1时,即将1个数据流映射到M个天线上时,这种空域的线性预编码又可以看作是传统的波束赋形方法。 When assuming the number of antennas is M, the number of data streams to L, when L 1 is equal to the number of data streams, i.e. a data stream is mapped to the M antennas, linear precoding can be seen as such and airspace is a conventional beam forming method. 传统的波束赋形方法能够有效降低终端间干扰,不仅包括来自本小区内的终端间干扰,也包括来自外小区的终端间干扰。 Conventional beam forming method can effectively reduce interference between the terminals, including not only the inter-terminal interference from intra-cell, but also interference between the terminals from outside the cell. 其工作原理是为某一终端分配一个特定的定向波束,在终端来波方向将获得较大的天线增益,而其他方向天线增益较小,从而有效的抑制了对其他终端的干扰。 Its working principle is assigned to a particular terminal of a directional beam in the direction of the terminal to obtain a large wave antenna gain, the antenna gain in other directions is small, thereby effectively suppressing interference to other terminals.

[0003] 预编码方法与传统的波束赋形方法的主要区别在于,传统的波束赋形方法是根据终端的方向进行赋形,一般只生成一个波束;而预编码方法是为一个终端生成多个波束,并且多个波束的预编码矩阵一般不是根据终端的方位生成,而是根据降低波束间干扰的需求生成。 [0003] The precoding method that the main difference with the conventional beam shaping method, a conventional beam forming method is shaped in accordance with the direction of the terminal, generally generating a beam; and a pre-coding method is to generate a plurality of terminals beam, and a plurality of beams is not generally precoding matrix generated according to the orientation of the terminal, but rather to reduce inter-beam interference generated according to demand.

[0004] 目前,在现有技术中时分双工(TDD =Time Division Duplex)系统只在下行方向上进行波束赋形(或预编码)。 [0004] At present, time division duplex (TDD = Time Division Duplex) system only beamforming (or precoding) in the downstream direction in the prior art. 这是因为在现有技术中上行方向是不进行波束赋形(或预编码)的,所以基本上上行导频符号和/或数据符号也不进行波束赋形(或预编码),故可以利用这些未预编码的导频符号和/或数据符号收集信道状态信息。 This is because it is not uplink beamforming (or precoding) in the prior art, so basically the uplink pilot symbols and / or data symbols does not perform beamforming (or precoding), it is possible to use these non-precoded pilot symbols and / or data symbols collected channel state information.

[0005] 如图1所示,简单说明现有技术中TDD系统在下行方向上进行波束赋形(或预编码)的过程,包括步骤: [0005] As shown in FIG. 1, the prior art processes briefly described TDD system beamforming (or precoding) in the downstream direction, comprising the steps of:

[0006] (101)终端发送上行导频符号和/或数据符号: [0006] (101) terminal transmits the uplink pilot symbols and / or data symbols:

[0007] 其中,任一个终端的上行导频符号和/或数据符号都未进行预编码。 [0007] wherein any one end of the uplink pilot symbols and / or data symbols precoded neither.

[0008] (102)基站通过上行信道探测(channel sounding)方法收集每个终端的上行信道状态信息(CSI =Channel State ^formation),并进行保存: Channel state information of the uplink channel [0008] (102) of each base station collects terminal through an uplink channel sounding (channel sounding) method (CSI = Channel State ^ formation), and save:

[0009] (103)计算线性预编码矩阵: [0009] (103) calculates a linear pre-coding matrix:

[0010] 在保存的信道状态信息中,根据某一终端对应的信道状态信息,计算该终端使用的线性预编码矩阵。 [0010] The channel state information is stored in accordance with the channel state information corresponding to a certain terminal, calculates a linear pre-coding matrix used by the terminal.

[0011] (104)进行线性预编码操作: [0011] (104) linear pre-coding operation performed:

[0012] 在获得相应的线性预编码矩阵之后,对多个并行传输的数据符号以及附带的导频符号进行线性预编码操作,并进行数据符号和导频符号的传输。 [0012] After obtaining the corresponding linear precoding matrix, a plurality of parallel data symbols and pilot symbols transmitted incidental linear precoding operation, and transmit the data symbols and pilot symbols.

[0013] 对于时分双工TDD系统而言,通常是利用信道的对称性,在一个方向上获得信道冲击响应H,并利用该信道冲击响应H计算在另外一个方向上使用的线性预编码矩阵V。 [0013] For a TDD system, typically using the symmetry of the channel, to obtain the channel impulse response H in one direction, and by using the channel impulse response H is calculated using the other direction of linear precoding matrix V . 在进行预编码操作时,同时对数据符号和用于信道估计的导频符号进行线性预编码。 During pre-coding operations, while the data symbols and pilot symbols for channel estimation for linear precoding. 由于导频符号也进行了预编码,这样就可以接收直接利用导频符号估计出的等效信道冲击响应矩阵HE直接进行数据的恢复操作。 Since the pilot symbols are also pre-coded, so that it can receive direct impingement of the equivalent channel using pilot symbol response matrix for the estimated direct HE data recovery operation. 这里TDD系统在利用信道的对称性时,要求一个方向上获得信道状态信息的时间与利用该信道状态信息进行预编码的时间不能相差太多,以保证该信道状态信息的可靠性(因为信道是时间选择性的,如果相差的时间太多,上下行的对称性将不再存在)。 Here TDD system utilizing the symmetry of the channel, requires a direction obtained Time and using the channel state information of the channel state information for precoding not differ too much on, to ensure the reliability of the channel state information (because the channel is selectively time, if too much time difference, the symmetry of the uplink and downlink will no longer exist). 然而,当上行方向上引入线性预编码且与下行方向的线性预编码同时存在时,如果一个方向上长时间发送预编码的导频符号,那么其保存的信道状态信息可能已经不能够代表当前的信道状态信息。 However, when the uplink direction is introduced linear pre-coding and the linear pre-coding in the downlink direction are present, if transmit precoded pilot symbols long in one direction, then the stored channel state information may no longer be representative of the current the channel state information. 因此,现有技术在收集信道状态信息时,无法保证根据未预编码的导频符号有效的获得信道状态信息。 Thus, the prior art when collecting channel state information, can not guarantee effective to obtain channel state information of non-precoded pilot symbols.

[0014] 另外,如果一个TDD系统的上下行可以使用不同的子频带进行数据传输,比如正交频分多址(OFDMA =Orthogonal Frequency Division Multiple Access)系统或者单载波频分多址(SC-FDMA :Single Carrier-Frequency Division Multiple Access)系统,且两个方向上所使用的子频带相隔太远,那么从一个方向上获得信道状态信息也不能够完全代表另外一个方向的信道状态信息,即可靠性有所降低(因为信道频率选择性的,如果相差的频率太多,上下行的对称性将不再存在)。 [0014] Further, if an uplink and downlink TDD system may use different frequency subbands for data transmission, such as orthogonal frequency division multiple access (OFDMA = Orthogonal Frequency Division Multiple Access) system or a single carrier frequency division multiple access (SC-FDMA : Single Carrier-Frequency Division Multiple Access) system, in both directions and the sub-band used are too far apart, it is obtained from a channel state information is not fully representative of the direction of the other direction of channel state information, i.e. the reliability decreased (as channel frequency selectivity, the frequency difference if too much, the symmetry of the uplink and downlink will no longer exist).

[0015] 综上所述,现有技术方案在上下行同时进行线性预编码时,存在无法有效获得信道状态信息的问题,且线性预编码也比较复杂。 [0015] In summary, the prior art solutions in the upper and lower rows at the same time carrying out linear precoding, the presence of the problem can not be effectively obtained channel state information, and also more complex linear precoding.

发明内容 SUMMARY

[0016] 本发明要解决的技术问题在于提供一种TDD系统的线性预编码方法及装置,能够获得可靠的信道状态信息,从而进行线性预编码矩阵计算和线性预编码操作,同时达到简化操作的目的。 [0016] The present invention is to solve the technical problem to provide a TDD system, the linear pre-coding method and apparatus capable of reliable channel state information, thereby performing linear precoding matrix computation, and linear pre-coding operation, and to simplify operation purpose.

[0017] 实现本发明目的的技术方案如下: [0017] The purpose of the present invention of the following:

[0018] 一种TDD系统进行线性预编码的方法,包括步骤: Method [0018] A TDD system for linear precoding, comprising the steps of:

[0019] 接收用户终端所对应的导频符号并根据未进行线性预编码的导频符号提取其对应的信道状态信息并保存; [0019] The receiving user terminal corresponding to the extracted pilot symbols and the corresponding pilot symbols is not performed in accordance with linear precoding channel state information and store;

[0020] 为即将进行线性预编码的用户终端从保存的信道状态信息中选择满足预定条件的信道状态信息,根据该选择的信道状态信息计算线性预编码矩阵,然后利用该线性预编码矩阵对数据符号及其伴随的导频符号进行线性预编码操作; [0020] The terminal selects from the channel state information stored for the user forthcoming linear precoding satisfies a predetermined condition the channel state information, calculates a linear pre-coding matrix according to channel states of the selected information, and then use the linear pre-coding matrix data symbols and pilot symbols accompanying the linear pre-coding operation;

[0021] 所述预定条件为:t' e [tT,t],其中:t'为用户终端获得对应的信道状态信息的时刻,T为系统预先设定的时间门限,t为用户终端即将进行预编码的时刻。 [0021] The predetermined condition is: t 'e [tT, t], where: t' channel state for the user terminal to obtain a corresponding time information, T is the system preset time threshold, t is the user terminal forthcoming pre-time coding.

[0022] 其中,提取所述用户终端对应的信道状态信息、获得该信道状态信息的时刻t '、及该信道状态信息对应的用户终端序号。 [0022] wherein, extracting the channel state information corresponding to the user terminal, the channel state information to obtain a time t ', and the channel state information corresponding to the user terminal number.

[0023] 其中,在满足下述预定条件的多个信道状态信息中选择距离时刻t最近的信道状态信息:t' e [tT,t],其中:T为系统预先设定的时间门限,t为用户终端即将进行预编码的时刻。 [0023] wherein, selected from the time a plurality of channel state information satisfies a predetermined condition of t latest channel state information: t 'e [tT, t], where: T is the system preset time threshold, t the user terminal upcoming time precoding.

[0024] 其中,在满足下述预定条件的多个信道状态信息中选取可利用的所有信道状态信息的平均值:t' e [tT,t],其中:T为系统预先设定的时间门限,t为用户终端即将进行预编码的时刻。 [0024] wherein, in a plurality of selected available channel state information satisfies the predetermined condition in the average of all the channel state information: t 'e [tT, t], wherein: T is system time gate preset limit , t is the user terminal precoding upcoming time.

[0025] 提取所述用户终端对应的各个子频带上的信道状态信息、获得该信道状态信息的时刻t'、该信道状态信息对应的各个子频带的序号f'、及该信道状态信息对应的用户终端序号。 [0025] extracting the channel state information on each sub-band corresponding user terminal, obtaining time of the channel state information t ', the channel state information corresponding to each sub-band number f', and the channel state information corresponding to the user terminal number. [0026] 其中,在满足下述预定条件的多个信道状态信息中选择距离时刻t最近并且距离子频带f最近的信道状态信息: [0026] wherein selecting the time and distance information on the distance of the nearest subband channel state f t recently plurality of channel state information in a predetermined condition is satisfied in the following:

[0027] t' e [tT,t],其中:T为系统预先设定的时间门限,t为用户终端即将进行预编码的时刻; [0027] t 'e [tT, t], where: T is the system preset time threshold, t is the time the user terminal forthcoming precoding;

[0028] f' e [fF, f+F],其中:F为系统预先设定的子频带序号门限,f为用户终端即将进行预编码的子频带序号。 [0028] f 'e [fF, f + F], where: F is the sub-band system preset threshold number, f is the forthcoming user terminal precoded sub-band number.

[0029] 其中,在满足下述预定条件的多个信道状态信息中选取可利用的所有信道状态信息的平均值: [0029] wherein the selected available channel state information in a plurality of following predetermined condition is satisfied in all of the average channel state information:

[0030] t' e [tT, t],其中:T为系统预先设定的时间门限,t为用户终端即将进行预编码的时刻; [0030] t 'e [tT, t], where: T is the system preset time threshold, t is the time the user terminal forthcoming precoding;

[0031] f' e [fF, f+F],其中:F为系统预先设定的子频带序号门限,f为用户终端即将进行预编码的子频带序号。 [0031] f 'e [fF, f + F], where: F is the sub-band system preset threshold number, f is the forthcoming user terminal precoded sub-band number.

[0032] 其中,采用发射波束赋形的方法计算线性预编码矩阵。 [0032] wherein the transmit beamforming using the method of calculating the linear pre-coding matrix.

[0033] 其中,如果不存在满足预定条件的信道状态信息,则基站或者终端通过控制信令请求终端或者基站发送未预编码的导频符号。 [0033] wherein, if the channel state information satisfies a predetermined condition does not exist, the base station or the terminal via the control terminal or base station sends signaling requests non-precoded pilot symbols.

[0034] 其中,在同一个TDD系统的基站中进行下行方向的线性预编码;在终端中进行上行方向的线性预编码。 [0034] wherein, in the downlink direction the base station in a TDD system the same linear precoding; linear precoding for uplink in the terminal.

[0035] 此外,本发明也提供一种TDD系统的线性预编码装置,包含: [0035] Further, the present invention also provides a TDD system, the linear pre-coding apparatus, comprising:

[0036] 信道状态信息收集器,用于接收用户终端所对应的导频符号并根据未进行线性预编码的导频符号提取其对应的信道状态信息; [0036] The channel state information collector for receiving the user terminal corresponding to the extracted pilot symbols and the corresponding channel state information based on the pilot symbols linear precoding is not performed;

[0037] 信道状态信息寄存器,用于存储提取的信道状态信息; [0037] The channel state information register for storing the channel state information extracted;

[0038] 信道状态信息选择器,用于从信道状态信息寄存器中,选择满足预定条件的信道状态信息,所述预定条件为:t' e [tT, t],其中:t'为用户终端获得对应的信道状态信息的时刻,T为系统预先设定的时间门限,t为用户终端即将进行预编码的时刻; [0038] The channel state information selector for selecting from the channel state information register satisfies a predetermined condition the channel state information, the predetermined condition is: t 'e [tT, t], where: t' for the user terminal to obtain corresponding to the channel state information is time, T is the system preset time threshold, t is the time the user terminal forthcoming precoding;

[0039] 预编码矩阵计算器,用于根据选择的信道状态信息计算线性预编码矩阵;以及 [0039] The precoding matrix calculator for calculating a channel state information according to the selected linear precoding matrix; and

[0040] 预编码器,用于根据该线性预编码矩阵对数据符号及其伴随的导频符号进行线性预编码操作。 [0040] The precoder for linear precoding operation on the data symbols and pilot symbols accompanying the basis of the linear pre-coding matrix.

[0041] 其中,所述信道状态信息收集器,用于提取所述用户终端对应的信道状态信息、获得该信道状态信息的时刻t'、及该信道状态信息对应的用户终端序号。 [0041] wherein the channel state information collector for extracting the channel state information corresponding to the user terminal, the channel state information to obtain a time t ', and the channel state information corresponding to the user terminal number.

[0042] 其中,所述信道状态信息选择器,进一步用于在满足下述预定条件的多个信道状态信息中选择距离时刻t最近的信道状态信息:t' e [tT, t],其中:T为系统预先设定的时间门限,t为用户终端即将进行预编码的时刻。 [0042] wherein the channel state information selector is further for selecting a plurality of time from the channel state information satisfies a predetermined condition of t latest channel state information: t 'e [tT, t], wherein: T is a preset system time threshold, t is the time the user terminal is about to perform precoding.

[0043] 其中,所述信道状态信息选择器,进一步用于在满足下述预定条件的多个信道状态信息中选取可利用的所有信道状态信息的平均值:t' e [tT, t],其中:T为系统预先设定的时间门限,t为用户终端即将进行预编码的时刻。 The average of all the channel state information [0043] wherein the channel state information selector is further for selecting a plurality of available channel state information satisfies the following predetermined condition: t 'e [tT, t], where: T is the system preset time threshold, t is the time the user terminal forthcoming precoding.

[0044] 其中,所述信道状态信息收集器,用于提取所述用户终端对应的各个子频带上的信道状态信息、获得该信道状态信息的时刻t'、该信道状态信息对应的各个子频带的序号f '、及该信道状态信息对应的用户终端序号。 [0044] wherein the channel state information collector for extracting the channel state information on each sub-band corresponding user terminal to obtain the channel state information of the time t ', each of the sub-channel state information corresponding to the frequency band the number f ', and the channel state information corresponding to the user terminal number.

[0045] 其中,所述信道状态信息选择器,进一步用于在满足下述预定条件的多个信道状态信息中选择距离时刻t最近并且距离子频带f最近的信道状态信息: [0045] wherein the channel state information selector is further for selecting a time t from the nearest sub-bands and information on the distance f latest channel state information of the plurality of channel state satisfies the following predetermined condition:

[0046] t' e [t_T,t],其中:T为系统预先设定的时间门限,t为用户终端即将进行预编码的时刻; [0046] t 'e [t_T, t], where: T is the system preset time threshold, t is the time the user terminal forthcoming precoding;

[0047] f' e [fF, f+F],其中:F为系统预先设定的子频带序号门限,f为用户终端即将进行预编码的子频带序号。 [0047] f 'e [fF, f + F], where: F is the sub-band system preset threshold number, f is the forthcoming user terminal precoded sub-band number.

[0048] 其中,所述信道状态信息选择器,进一步在满足下述预定条件的多个信道状态信息中选取可利用的所有信道状态信息的平均值: [0048] wherein the channel state information selector, further select a plurality of available channel state information following a predetermined condition is satisfied in all of the average channel state information:

[0049] t' e [tT,t],其中:T为系统预先设定的时间门限,t为用户终端即将进行预编码的时刻; [0049] t 'e [tT, t], where: T is the system preset time threshold, t is the time the user terminal forthcoming precoding;

[0050] f' e [fF, f+F],其中:F为系统预先设定的子频带序号门限,f为用户终端即将进行预编码的子频带序号。 [0050] f 'e [fF, f + F], where: F is the sub-band system preset threshold number, f is the forthcoming user terminal precoded sub-band number.

[0051] 其中,所述预编码矩阵计算器,采用发射波束赋形的方法计算线性预编码矩阵。 [0051] wherein, the precoding matrix calculator for calculating the linear pre-coding matrix using transmit beamforming method.

[0052] 其中,进一步包括控制信令发送器,用于发送控制信令请求基站或者终端发送未预编码的导频符号。 [0052], further comprising a control signaling transmitter for transmitting the control signaling sent by the terminal does not request the base station or precoded pilot symbols.

[0053] 其中,在同一个TDD系统的基站侧线性预编码装置,用于进行下行方向的线性预编码;终端侧线性预编码装置,用于进行上行方向的线性预编码。 [0053] wherein the base station side with a linear pre-coding apparatus of a TDD system, a linear pre-coding in the downlink direction; terminal side linear pre-coding means for linear precoding for the upstream direction.

[0054] 本发明是针对发射端和接收端都具有多根天线的时分双工通讯系统,当下行方向和上行方向都允许进行线性预编码操作时,通过判断所接收到的导频符号是否进行了线性预编码来确定是否根据该导频符号提取其对应的信道状态信息,并将获得的信道状态信息进行保存;通过判断获得所述信道状态信息是否满足预定的条件,来决定是否需要根据该信道状态信息计算线性预编码矩阵,进而进行线性预编码操作。 When the [0054] time division duplex communication system according to the present invention is directed to transmitting and receiving ends having a plurality of antennas, the downlink and the uplink allow linear precoding operation, the received pilot symbols by determining whether a linear pre-coding to determine whether to extract based on the pilot symbol channel state information corresponding to the channel state information and the acquired saved; by determining obtain the channel state information whether or not a predetermined condition is satisfied, determine whether to according to the the channel state information calculating linear pre-coding matrix, and further linear pre-coding operation. 此外,当存在多个满足条件的信道状态信息时,可以从多个信道状态信息中选择一个最优的信道状态信息,或者将所有信道状态信息进行平均得到一个新的信道状态信息,用来计算线性预编码矩阵。 Further, when the channel state information of a plurality meet the conditions may be selected from a plurality of channel state information in a optimal channel state information, or all the channel state information is averaged to get a new channel state information, used to calculate linear precoding matrix.

[0055] 下面结合附图和具体实施方式对本发明作进一步描述。 [0055] The present invention will be further described in conjunction with the accompanying drawings and specific embodiments.

附图说明 BRIEF DESCRIPTION

[0056] 图1是现有技术线性预编码方法的流程图; [0056] FIG. 1 is a flowchart illustrating the prior art linear pre-coding method;

[0057] 图2是线性预编码方法的原理示意图; [0057] FIG. 2 is a simplified schematic of linear pre-coding method;

[0058] 图3是本发明在基站侧进行下行方向的线性预编码的实现方法流程图; [0058] FIG. 3 is a linear pre-coding of the present invention in the downlink direction the base station side flowchart of a method implemented;

[0059] 图4是本发明在基站侧进行下行方向的线性预编码的实现装置框架图; [0059] FIG. 4 is a linear pre-coding of the present invention in the downlink direction the base station apparatus side frame in FIG implemented;

[0060] 图5是本发明在终端侧进行上行方向的线性预编码的实现方法流程图; [0060] FIG. 5 is a linear pre-coding of the present invention the upstream direction flowchart of a method implemented in the terminal side;

[0061] 图6是本发明在终端侧进行上行方向的线性预编码的实现装置框架图。 [0061] FIG. 6 is a linear precoded uplink present invention implemented in the terminal device frame side in FIG.

具体实施方式 Detailed ways

[0062] 如图2所示,简单说明线性预编码的实现原理。 [0062] As shown in FIG 2, to show how it simple linear precoding. L个数据流X通过一个预编码器形成M根天线上对应的发送信号Y。 A transmission signal corresponding to the M antennas X L data streams formed by a precoder Y. 线性预编码操作可以用一个线性预编码矩阵V来等效,即Y = VX,其中X的维数为Lxl,Y的维数为Mxl,V的维数为MxL。 Linear pre-coding operation may be a linear precoding matrix V is equivalent to, i.e., Y = VX, where X is the number of dimensions LXL, dimension Y is MXL, V is the dimension MxL.

[0063] 通常,线性预编码矩阵V可以使用信道冲击响应矩阵H来计算,假设发射天线数目为M,接收端天线数目为K,如果考虑单径信道,即H的维数为KxM,那么可以将H进行特征值分角军(SVD singular value decomposition),得至Ij : [0063] Generally, the linear precoding matrix V can be calculated using the channel impulse response matrix H, is assumed that the number of transmit antennas is M, the number of the receiving end of the antenna is K, if considering a single-path channel, i.e., the dimension H is KXM, it can be the eigenvalue bisector H Army (SVD singular value decomposition), to give Ij:

[0064] H = UA Vh [0064] H = UA Vh

[0065] 其中,U是维数为KXL的酉矩阵,即UhU = I,V是维数为MXL的酉矩阵,即VhV = 1,1表示维数为LXL的单位阵,上标“H”表示矩阵的共轭转置操作,A是维数为LXL的对角矩阵,其对角线元素是非负的实数,并且非对角线元素为0,L < min(M, K)。 [0065] wherein, U is of dimension KXL unitary matrix, i.e. UhU = I, V is the dimension of a unitary matrix MXL, i.e. VhV = 1,1 dimension is represented LXL identity matrix, the superscript "H" denotes the conjugate transpose matrix operation, a is the dimension of a diagonal matrix LXL, which is the real non-negative diagonal elements and off-diagonal elements are 0, L <min (M, K).

[0066] 那么这里的矩阵V即为预编码矩阵,即 [0066], this matrix is ​​the precoding matrix V, i.e.,

[0067] Z = HY+N = HVX+N [0067] Z = HY + N = HVX + N

[0068] 其中Z表示接收信号,维数为KX 1,N表示噪声向量,维数为KX 1。 [0068] wherein Z represents the received signal with the dimension KX 1, N represents noise vector of dimension KX 1.

[0069] 此时,可以将HV看作一个等效的信道冲击响应矩阵He, [0069] In this case, HV may be considered as an equivalent channel impulse response matrix He,

[0070]即 He = HV,所以 [0070] i.e., He = HV, so

[0071] Z = HeX+N [0071] Z = HeX + N

[0072] 那么,等效的信道冲击响应矩阵&的相关矩阵&为: [0072] Then, the equivalent channel impulse response matrix & & correlation matrix is:

[0073] Re = HehHe = (HV)H (HV) [0073] Re = HehHe = (HV) H (HV)

[0074]因为 HV = UAJjfW [0074] Since HV = UAJjfW

[0075] Re = (UA)h(UA) = AhA [0075] Re = (UA) h (UA) = AhA

[0076] 可以看出,等效的相关矩阵&是一个对角矩阵,即通过线性预编码操作,在等效的信道空间上,发送信号X之间是彼此完全不相关的,从而有利于多个并行数据的传输。 [0076] As can be seen, the equivalent correlation matrix is ​​a diagonal matrix &, i.e. linear precoding operation on the equivalent channel space is completely uncorrelated with each other between the transmission signal X, to facilitate multiple a parallel data transfer. 其中,当接收天线数目K = 1时,预编码矩阵V = HH,此时预编码操作即为传统的波束赋形。 Wherein, when the number of receiving antennas K = 1, a precoding matrix V = HH, the precoding operation is the case of the conventional beamforming.

[0077] 下面,结合图3-6说明本发明利用TDD系统上下行信道对称性进行线性预编码的方法和装置。 [0077] Next, a bonding method and apparatus of the present invention is described using a TDD uplink and downlink channel for linear precoding symmetry 3-6 of FIG.

[0078] 首先,对于发射端和接收端都具有多根天线的时分双工通信系统来说,当下行方向和上行方向都允许进行线性预编码操作时,在基站侧可以采用如下方法进行下行方向的线性预编码,如图3所示: Time division duplex communication system [0078] First, the transmitting and receiving ends having a plurality of antennas, the uplink and downlink directions allows linear precoding operation, the base station side may be adopted a method of performing downlink direction linear precoding, shown in Figure 3:

[0079] (301)基站接收终端发送的上行导频符号和/或上行数据符号: [0079] Uplink guide (301) receiving terminal station transmits pilot symbols and / or uplink data symbols:

[0080] 其中,任一个终端的上行导频符号可以是进行了预编码的,也可以是未进行预编码的。 [0080] wherein any terminal uplink pilot symbols may be pre-coded, and may be not precoded.

[0081] (302)基站通过上行信道探测(channel sounding)方法探测每个终端的上行信道状态信息(CSI :Channel State Information): [0081] (302) the base station (channel sounding) method for detecting a channel state information of the uplink channel for each terminal (CSI: Channel State Information) through an uplink channel sounding:

[0082] 如果该终端的上行导频符号(也可以称为参考符号或训练序列)已经进行了线性预编码,那么不进行收集利用该导频符号获得的该终端的信道状态信息;如果该终端的上行导频符号未进行线性预编码,再对该终端的该信道状态信息进行收集,并将该信道状态信息保存到信道状态信息寄存器中; [0082] If the uplink pilot the terminal pilot symbols (also referred to as reference symbols or training sequence) has a linear pre-coding, then no channel state information of the terminal of the pilot symbols obtained was collected using; if the terminal uplink pilot symbols linear precoding is not performed, then the channel state information of the terminal is gathered, and the channel status information to an information register in the channel state;

[0083] (303)基站从保存起来的上行信道状态信息中,根据系统事先设定的条件选择满足可靠性的信道状态信息。 [0083] (303) saved from the base station uplink channel state information, the system according to the condition set in advance that satisfies the reliability of channel state information.

[0084] 对于某一个终端,如果存在满足预定条件的上行信道状态信息,则可以进行下行方向的线性预编码操作,则进入步骤(304),否则进入步骤(306): [0084] For a particular terminal, if the uplink channel status information satisfies a predetermined condition exists, then the downlink direction may be a linear pre-coding operation proceeds to step (304), otherwise go to step (306):

[0085] (304)计算线性预编码矩阵: [0085] (304) calculates a linear pre-coding matrix:

[0086] 利用满足预定条件的信道状态信息计算该终端使用的线性预编码矩阵。 Channel status [0086] information satisfies a predetermined condition using the calculated linear precoding matrix used by the terminal.

[0087] (305)进行线性预编码操作:[0088] 在获得相应的线性预编码矩阵之后,对多个并行传输的数据符号以及附带的导频符号进行线性预编码操作,并进行数据符号和导频符号的传输;然后,结束; [0087] (305) linear pre-coding operation performed: [0088] After obtaining the corresponding linear precoding matrix, a plurality of parallel data symbols and pilot symbols transmitted incidental linear precoding operation, and data symbols and pilot transmitted pilot symbols; then ends;

[0089] (306)不进行线性预编码操作: [0089] (306) without linear precoding operation:

[0090] 对多个并行传输的数据符号以及附带的导频符号直接进行传输,而不对数据符号以及附带的导频符号进行下行预编码操作;然后,结束。 [0090] The plurality of parallel transmission of data symbols and pilot symbols transmitted shipped directly, without the data symbols and pilot symbols accompanying the downlink precoding operation; then ends.

[0091] 在上述步骤(301)中,如果导频符号是与数据符号伴随在一起的,那么当数据符号进行预编码时,导频符号也同时进行预编码操作;当数据符号不进行预编码时,导频符号也不进行预编码操作;如果导频符号是独立于数据进行发送的,那么该导频符号可以是未预编码的。 [0091] In the step (301), if the pilot symbols and data symbols are associated together, then when the precoded data symbols, pilot symbols are also pre-coding operation; when the data is not precoded symbols when pilot symbols precoding operation is not performed; if the pilot symbols that are independent of the data transmitted, then the pilot symbols may not be precoded. 与数据符号独立的导频符号信息需要通过某种方式告知给接收端,比如通过信令的方式,或者采用双方约定的方式,或者两者结合的方式。 Separate data symbols pilot symbols need to notify the information to the receiver in some way, such as by way of signaling, or using a mutually agreed upon manner, or a combination of both.

[0092] 比如,当时分双工系统不在频域上进行终端区分时(比如单载波的TD-SCDMA系统),即任何一个终端的上下行传输均占用整个系统带宽时,并且数据符号和导频符号的传输使用相同的系统带宽。 When (such as single-carrier TD-SCDMA system) [0092] For example, when the terminal-division duplex system is not distinguished on the frequency domain, i.e. uplink and downlink transmission are any terminal occupy the entire system bandwidth, and the data symbols and pilot transmission symbols use the same system bandwidth. 此时可以在特定的上行时隙中发送与数据独立的未预编码导频符号,这样基站可以利用该导频符号来收集上行终端的信道状态信息。 At this time, it may be transmitted in a particular time slot and an uplink data-independent non-precoded pilot symbols, the base station may be utilized so that the channel state information of the uplink pilot symbols collection terminal.

[0093] 再比如,当时分双工系统需要在频域上进行终端区分时(比如OFDMA系统、或者SC-FDMA系统),即终端只占用系统带宽的一部分(子频带)进行数据符号传输,并且同一个终端在上行传输和下行传输时可以占用不同宽度和位置的子频带。 When (such as OFDMA system or SC-FDMA system) [0093] As another example, the time division duplex system requires the terminal to distinguish in the frequency domain, i.e., the terminal consumes only a portion of the system bandwidth (subband) for data symbol transmission, and when a terminal with uplink and downlink transmission may occupy different sub-band widths and positions. 此时,数据符号和导频符号传输可以使用相同的子频带范围,也可以让导频符号传输所使用的子频带范围大于数据符号传输所使用的子频带范围,其中频带外部的导频符号不进行预编码,那么基站可以利用该频带外部的导频符号来收集上行终端的信道状态信息。 At this time, the data symbols and pilot symbols may be transmitted using the same sub-band range, but also allows the pilot subbands used for symbol transmission range greater than the range of sub-band data used for symbol transmission, wherein the frequency band is not the external pilot symbols pre-coding, the base station can use the external band uplink pilot symbols collecting channel state information of the terminal. 同样,对于可以频域上进行终端区分的时分双工系统来说,也可以在特定的上行时隙中发送与数据独立的未预编码导频符号,这样基站可以利用该导频符号来收集上行终端的信道状态信息。 Similarly, the terminal can be distinguished for time division duplex systems the frequency domain, the data may be transmitted in a particular independent uplink slot is not precoded pilot symbols, so that the base station can use the uplink pilot symbols collection the channel state information of the terminal.

[0094] 信道状态信息一般指信道冲击响应矩阵。 [0094] The channel state information generally refers to the channel impulse response matrix. 在步骤(302)中所述的信道探测方法, 即所谓的信道估计方法,只是信道探测和信道估计的目的不同,其中:信道估计方法的目的是接收端接收已知的导频符号、获得信道的冲击响应矩阵,并利用该信道冲击响应矩阵进行数据符号的恢复;而信道探测方法的目的只是获得信道的冲击响应矩阵,该信道冲击响应矩阵可能不被用于数据符号的恢复。 In step (302) a channel sounding method described, i.e., a so-called channel estimation method, but different purposes channel sounding and channel estimation, wherein: the purpose of estimating method of a channel receiving terminal for receiving known pilot symbols to obtain channel the impulse response matrix using the channel impulse response matrix to recover the data symbols; the object of a channel sounding method to just access the impact of the channel response matrix, the channel impulse response matrix may not be used to recover data symbols.

[0095] 在步骤(302)中,信道状态信息寄存器中保存的某一用户终端的信道状态信息的长度一般由系统事先指定。 [0095] In step (302), the channel length of channel state information stored in the channel state information of a user terminal registers generally designated by the system in advance.

[0096] 在步骤(303)中,选择可靠性高的信道状态信息的预定条件一般由系统事先指定。 [0096] In step (303), the predetermined condition selected channel state information having high reliability by a system generally designated beforehand.

[0097] 对于不在频域上进行用户终端区分的TDD系统来说,由于其上下行传输使用的频带相同,因此其信道状态信息的可靠性只与空间信道的相关时间有关,此时可以设定一个时间门限T,用于为即将在时刻t进行数据传输的用户终端,从保存的信道状态信息中选择满足下述预定条件的信道状态信息: [0097] For a TDD system on the user terminal does not distinguish the frequency domain, the frequency band which is the same as used for uplink and downlink transmission, so that the reliability of the channel state information only related to time and space of the relevant channel, this time can be set a time threshold T, for the user terminal for the upcoming data transmission at time t, selecting a channel state of a predetermined condition is satisfied the following information from the channel state information held in:

[0098] t' e [tT,t],其中t'为用户终端对应的信道状态信息的获得时刻,T为系统预先设定的时间门限; [0098] t 'e [tT, t], where t' channel state is obtained for the user terminal corresponding to the time information, T is the system preset time threshold;

[0099] 此时,要求在上述步骤(301)中在保存信道状态信息时,也要将对应的用户终端序号、获得该信道状态信息的时刻进行保存。 [0099] In this case, requiring the user terminal ID in the above step (301) when the channel state information saved, but also the corresponding time to obtain the channel state information is saved. [0100] 对于要在频域上进行用户终端区分的TDD系统来说,由于其上下行传输使用的频带可能不同,因此其信道状态信息的可靠性不仅与空间信道的相关时间有关,也与空间信道相关带宽有关,此时不仅需要设定一个时间门限T,同时还需要设定一个子频带序号门限F,用于为即将在时刻t、子频带f进行数据传输的用户终端,从保存的信道状态信息中选择满足下述预定条件的信道状态信息: [0100] For a TDD system to a user terminal distinguished in the frequency domain, because the bands may be different from its downlink transmission used, so the channel state reliability information is not only the spatial channel correlation time, but also with the space channel correlation bandwidth. for this case only needs to set a time threshold T, but also necessary to set a sub-band number threshold f., is used for the upcoming time t, the sub-bands f user terminal for data transmission, the channel stored state information are selected in a predetermined condition is satisfied channel state information:

[0101] t' e [tT,t],其中t'为用户终端对应的信道状态信息的获得时刻,T为系统预先设定的时间门限; [0101] t 'e [tT, t], where t' channel state is obtained for the user terminal corresponding to the time information, T is the system preset time threshold;

[0102] f' e [fF, f+F],其中f'为用户终端对应的信道状态信息所对应的子频带序号, F为系统预先设定的子频带序号门限; [0102] f 'e [fF, f + F], where f' is the channel state information corresponding to the user terminal corresponding to the subband number, F is the sub-band system preset threshold number;

[0103] 此时,要求在上述步骤(301)中在保存信道状态信息时、也要将对应的用户终端序号、获得该信道状态信息的时刻、以及信道状态所对应的子频带序号进行保存。 [0103] In this case, requiring the user terminal ID in the above step (301) when saving the channel state information, also corresponding to the obtained time of the channel state information, and a sub-band serial channel state corresponding to the saved.

[0104] 一般情况下,上述门限值设定得越小,信道状态信息可靠性越高。 The [0104] Generally, the above threshold is set to be smaller, the higher the reliability of the channel state information. 在实际系统中, 该门限值可以通过针对典型信道进行仿真,并结合系统实验来决定。 In a practical system, the threshold value can be determined by simulating a typical channel, and the experimental binding system.

[0105] 在步骤(304)中,如果存在满足预定条件的多个该终端可利用的信道状态信息时,可以任意选择一个信道状态信息、或者选择一个最优的信道状态信息(比如距离发送时刻t最近和/或子频带f最近的信道状态信息)或者对所有信道状态信息进行平均,来计算该终端使用的线性预编码矩阵。 [0105] In step (304), if the channel state information of the plurality of the terminal satisfies a predetermined condition may be utilized exist, can choose a channel state information, or select an optimal channel state information (such as from the transmission time recently t and / or sub-band f latest channel state information) or by averaging all the channel state information, calculates the linear pre-coding matrix used by the terminal.

[0106] 更具体而言,计算线性预编码矩阵时,需要考虑如下两种情况,即 [0106] More specifically, the calculation of the linear pre-coding matrix, consider the following two cases, i.e.,

[0107] (A)信道状态信息是充分时: [0107] (A) the channel state information is sufficient:

[0108] 如果该信道状态信息是通过在上行方向上、一个终端的多根天线上发送出来的、 彼此正交的未预编码导频符号获得的,那么该信道状态信息是充分的。 [0108] If the channel state information is sent out through the plurality of antennas in the uplink direction, a terminal, another non-precoded pilot symbols is obtained, then the channel state information is sufficiently orthogonal. 比如,假设基站发送天线数目为M,终端接收天线数目为K,如果导频符号是在上行方向上的K根天线上发送出来的,并且彼此正交,并使用M根接收天线进行接收,那么获得的信道冲击响应矩阵H的维数为KXM,即为充分的信道状态信息。 For example, the number of transmitting antennas is assumed that the base station is M, the number of terminals receiving antennas is K, if pilot symbols are transmitted on the K antennas out in the upstream direction, and orthogonal to each other, using the M receive antennas for receiving, then the dimension of the channel impulse response matrix H obtained is KXM, shall be sufficient channel state information.

[0109] 在获得的信道状态信息是充分的情况下,可以利用该信道冲击响应矩阵H进行预编码矩阵的计算,比如采用特征值分解的方法。 [0109] In the channel state information obtained is sufficient, you can use the channel impulse response matrix H is calculated precoding matrix, such as eigenvalue decomposition method.

[0110] (B)信道状态信息是不充分时: [0110] (B) channel state information is not sufficient:

[0111] 如果该信道状态信息是通过在上行方向上的、一个终端的一根天线上发送出来的导频符号、或者多根天线上发送出来的彼此相同的导频符号获得的,那么该信道状态信息是不充分的。 [0111] If the channel state information is sent out through the upper in the upstream direction, a one antenna terminal of the pilot symbols, or sent out of the plurality of antennas are the same pilot symbols obtained, then the channel state information is not sufficient. 比如,假设基站发送天线数目为M,终端接收天线数目为K,如果导频符号是在上行方向上的1根天线上、或者在K根天线上通过重复发送出来的,并使用M根接收天线进行接收,那么获得的信道冲击响应矩阵H的维数为IXM的,即为不充分的信道状态信息。 For example, the number of transmitting antennas is assumed that the base station is M, the number of reception antennas of the terminal is K, if pilot symbols are on an antenna in the upstream direction, or the K antennas by repeatedly sending out, using M receive antennas receiving, then the channel impulse response obtained for the dimensions of the matrix H IXM, namely insufficient channel state information.

[0112] 在获得的信道状态信息不充分的情况下,可以采用发射波束赋形的方法获得所需要的预编码矩阵。 [0112] In the channel state information obtained is insufficient, transmit beamforming methods may be employed to obtain the desired pre-coding matrix. 比如,当发送的数据流数目为L时,预编码矩阵可以表示为:V= [V1 V2 · VL] For example, when the number of transmitted data streams is L, the precoding matrix can be expressed as: V = [V1 V2 · VL]

[0113] 其中,Vi表示第i个数据流对应的预编码列向量。 [0113] wherein, Vi represents a data stream corresponding to the i-th precoding column vector. 当获得的信道冲击响应矩阵H 的维数为IxM时,每一个数据流对应的预编码列向量相同,即V = [ν ν · ν] Obtained when the dimension of the channel impulse response matrix H IXM, each data stream corresponding to the same precoding column vectors, i.e., V = [ν ν · ν]

[0114] 其中,ν可以采用传统的波束赋形方法得到,比如:采用最大比波束赋形方法,ν = HH,或者采用基于方向的波束赋形方法。 [0114] where, v may be employed a conventional beam forming method to give, for example: use of maximum ratio beam forming method, ν = HH, or direction based beam forming method. [0115] 其次,对于发射端和接收端都具有多根天线的时分双工通信系统来说,当下行方向和上行方向都允许进行线性预编码操作时,在基站侧进行下行方向的线性预编码的装置如图4所示,具体包括: [0115] Next, for transmitting and receiving ends are a linear pre-coding division duplex communication system when a plurality of antennas, the uplink and downlink directions allows linear pre-coding operation performed in the downlink direction the base station side the apparatus shown in Figure 4, comprises:

[0116] 基站侧信道状态信息收集器401,用于接收用户终端所对应的导频符号并进行判断该导频符号是否进行了线性预编码:如果该导频符号未进行线性预编码,那么根据该导频符号提取其对应的信道状态信息,并将获得的信道状态信息保存到信道状态信息寄存器中; [0116] base station side channel state information collector 401, for receiving the user terminal corresponding to the pilot symbols and determines the guiding whether pilot symbols are linear precoding: If the pilot symbol linear pre-coding is not performed, then in accordance with the extracted pilot symbols corresponding to the channel state information thereof, and channel state information to save the obtained channel state information register;

[0117] 基站侧信道状态信息寄存器402,用于存储获得的信道状态信息; [0117] base station side channel state information register 402, for storing the channel state information acquired;

[0118] 基站侧信道状态信息选择器403,用于从信道状态信息寄存器中,选择满足预定条件的信道状态信息; [0118] Status information of a base station side channel selector 403, a channel state information from a register, selects the channel status information satisfies a predetermined condition;

[0119] 基站侧预编码矩阵计算器404,用于根据选择的信道状态信息计算线性预编码矩阵; [0119] The base station 404 side of the precoding matrix calculator for calculating a channel state information according to the selected linear precoding matrix;

[0120] 基站侧预编码器405,用于根据该线性预编码矩阵对数据符号和/或导频符号进行线性预编码操作。 [0120] The base station-side precoder 405 for linear precoding operation on the data symbols and / or pilot symbols based on the linear pre-coding matrix.

[0121] 此外,在基站侧进行下行方向的线性预编码的装置中,还可以包括终端侧控制信令发送器406,用于当基站侧信道状态信息选择器没有选择出满足预定条件的信道状态信息时,向终端发送控制信令请求发送导频符号。 [0121] Furthermore, means of linear precoding downlink direction the base station side, also includes a terminal-side control signaling 406, for, when the base station side channel state information selection does not select a channel state satisfying a predetermined condition when the information transmission control signaling to request the terminal to transmit the pilot symbols.

[0122] 前面所述的方法和装置中,是以基站侧在下行方向上进行预编码操作为例进行说明的,该方法同样适用于终端侧在上行方向进行预编码操作的情况。 [0122] The method and apparatus described in the foregoing, the base station side based on pre-coding operation in the downstream direction will be described as an example, the method is equally applicable for the case of pre-coding operation in the terminal side in the upstream direction. 下面分别对终端侧在上行方向进行预编码的方法和装置简单进行说明: Next, a method and apparatus for precoding terminal side, respectively in the uplink direction will be briefly described:

[0123] 在终端侧进行上行方向的线性预编码的步骤,如图5所示: Step [0123] linear pre-coding is performed in the uplink direction on the terminal side shown in Figure 5:

[0124] (501)终端接收基站发送的下行导频符号和/或数据符号: [0124] downlink pilot symbols (501) the terminal receives a base station and / or data symbols:

[0125] 其中,任一个基站的下行导频符号可以是进行了预编码的,也可以是未进行预编码的。 [0125] wherein any of a base station of the downlink pilot symbols may be pre-coded, and may be not precoded.

[0126] (502)终端通过下行信道探测方法探测每个基站的下行信道状态信息: [0126] (502) terminal detects a downlink channel state information of each base station through a downlink channel detection method:

[0127] 如果该基站的下行导频符号已经进行了线性预编码,那么不进行收集利用该导频符号获得的该基站的信道状态信息;如果该基站的下行导频符号未进行线性预编码,再对该基站的该信道状态信息进行收集,并将该信道状态信息保存到信道状态信息寄存器中; [0127] If the downlink pilot of the base station pilot symbol has been linear precoding, it is not collected by using the pilot of the base station symbols obtained channel state information; if the downlink pilot of the base station pilot symbol is not linear precoding, then the collected channel state information to the base station, and the channel status information to an information register in the channel state;

[0128] (503)终端从保存起来的下行信道状态信息中,根据系统事先设定的条件选择满足可靠性的信道状态信息。 [0128] (503) terminal from the downlink channel saved state information, the system according to the condition set in advance that satisfies the reliability of channel state information.

[0129] 对于某一个终端,如果存在满足预定条件的下行信道状态信息,则可以进行上行方向的线性预编码操作,则进入步骤(504),否则进入步骤(506): [0129] For a particular terminal, if the downlink channel state information satisfies a predetermined condition exists, the upstream direction may be a linear pre-coding operation proceeds to step (504), otherwise go to step (506):

[0130] (504)计算线性预编码矩阵: [0130] (504) calculates a linear pre-coding matrix:

[0131] 利用满足预定条件的信道状态信息计算该终端使用的线性预编码矩阵。 Channel status [0131] information satisfies a predetermined condition using the calculated linear precoding matrix used by the terminal.

[0132] (505)进行线性预编码操作: [0132] (505) linear pre-coding operation performed:

[0133] 在获得相应的线性预编码矩阵之后,对多个并行传输的数据符号以及附带的导频符号进行线性预编码操作,并进行数据符号和导频符号的传输; [0133] After obtaining the corresponding linear precoding matrix, a plurality of parallel data symbols and pilot symbols transmitted incidental linear precoding operation, and the data symbols and pilot symbols transmitted;

[0134] 然后,结束; [0134] Then, ends;

[0135] (506)不进行线性预编码操作:[0136] 对多个并行传输的数据符号以及附带的导频符号直接进行传输,而不对数据符号以及附带的导频符号进行下行预编码操作;然后,结束。 [0135] (506) without linear precoding operation: [0136] a plurality of parallel transmission of data symbols and pilot symbols transmitted shipped directly, without the data symbols and pilot symbols accompanying the downlink precoding operation; then, the end.

[0137] 如图6所示,在终端侧进行上行方向的线性预编码的装置,具体包括: [0137] As shown in FIG. 6, the means of linear precoding in the uplink direction on the terminal side comprises:

[0138] 终端侧信道状态信息收集器601,用于接收用户终端所对应的导频符号并进行判断该导频符号是否进行了线性预编码:如果该导频符号未进行线性预编码,那么根据该导频符号提取其对应的信道状态信息,并将获得的信道状态信息保存到信道状态信息寄存器中; [0138] the terminal side channel state information collector 601, for receiving the user terminal corresponding to the pilot symbols and determines the guiding whether pilot symbols are linear precoding: If the pilot symbol linear pre-coding is not performed, then in accordance with the extracted pilot symbols corresponding to the channel state information thereof, and channel state information to save the obtained channel state information register;

[0139] 终端侧信道状态信息寄存器602,用于存储获得的信道状态信息; [0139] the terminal side channel state information register 602, a channel state information obtained is stored;

[0140] 终端侧信道状态信息选择器603,用于从信道状态信息寄存器中,选择满足预定条件的信道状态信息; [0140] the terminal side channel state information selector 603, a channel state information from a register, selects the channel status information satisfies a predetermined condition;

[0141] 终端侧预编码矩阵计算器604,用于根据选择的信道状态信息计算线性预编码矩阵; [0141] the terminal-side precoding matrix calculator 604 for calculating a channel state information according to the selected linear precoding matrix;

[0142] 终端侧预编码器605,用于根据该线性预编码矩阵对数据符号和/或导频符号进行线性预编码操作。 [0142] the terminal-side precoder 605 for linear precoding operation on the data symbols and / or pilot symbols based on the linear pre-coding matrix.

[0143] 此外,在终端侧进行上行方向的线性预编码的装置中,还可以包括终端侧控制信令发送器606,用于当终端侧信道状态信息选择器没有选择出满足预定条件的信道状态信息时,向基站发送控制信令请求发送导频符号。 [0143] Further, means linear pre-encoded uplink in the terminal side, also includes a terminal-side control signaling transmitter 606 for, when the terminal side channel state information selector is not selected satisfies a predetermined condition the channel state when the information transmission control signaling to request the base station transmits a pilot symbol.

[0144] 在前面所述的方法和装置中,发射端和接收端都具有多根天线,这并不排除一端具有多根天线、而另外一端只有单根天线的情况。 [0144] In the method and apparatus previously described, the transmitting end and the receiving end having a plurality of antennas, this does not preclude having a plurality of antennas at one end, while the other end where only a single antenna. 当基站端存在多根天线、而终端只存在一根天线时,线性预编码操作退化为发送波束赋形操作,并且只能在下行方向上进行;同样, 当基站端只存在一根天线、而终端存在多根天线时,线性预编码操作退化为发送波束赋形操作,并且只能在上行方向上进行。 When multiple antennas at the base station, but there is only one antenna terminal, the linear pre-coding operation can only be degraded in the downlink direction to transmit a beamforming operation, and; likewise, if there is only one end of the base station antennas and the terminal when there are a plurality of antennas, the linear pre-coding operation is degraded transmission beamforming operation, and only in the upstream direction.

[0145] 以上所述的本发明实施方式,并不构成对本发明保护范围的限定。 [0145] The above-described embodiments of the present invention, not to limit the scope of the present invention. 任何在本发明的精神和原则之内所作的任何修改、等同替换和改进等,均应包含在本发明的权利要求保护范围之内。 Any Any modifications within the spirit and principle of the present invention, equivalent substitutions and improvements should be included within the protection scope claimed in the claims of the present invention.

Claims (20)

  1. 1. 一种TDD系统进行线性预编码的方法,其特征在于,包括步骤:接收用户终端所对应的导频符号并根据未进行线性预编码的导频符号提取其对应的信道状态信息并保存;为即将进行线性预编码的用户终端从保存的信道状态信息中选择满足预定条件的信道状态信息,根据该选择的信道状态信息计算线性预编码矩阵,然后利用该线性预编码矩阵对数据符号及其伴随的导频符号进行线性预编码操作;所述预定条件为:t' e [tT,t],其中:t'为用户终端获得对应的信道状态信息的时刻,T为系统预先设定的时间门限,t为用户终端即将进行预编码的时刻。 A method for linear precoding TDD system, the method comprising the steps of: receiving a user terminal corresponding to the extracted pilot symbols and the corresponding channel state information according to the non-pilot symbols for linear precoding and stored; selecting from the channel state information stored in the user terminal forthcoming linear precoding satisfies a predetermined condition the channel state information, calculates a linear pre-coding matrix according to channel states of the selected information, and then use the linear pre-coding matrix data symbols and accompanying pilot symbols linear precoding operation; the predetermined condition is: t 'e [tT, t], where: t' letter corresponding to the user terminal obtains channel state information is time, T is a preset time the system threshold, t is the time the user terminal forthcoming precoding.
  2. 2.如权利要求1所述的线性预编码方法,其中,提取所述用户终端对应的信道状态信息、获得该信道状态信息的时刻t'、及该信道状态信息对应的用户终端序号。 2. The linear precoding method according to claim 1, wherein said extracting channel state information corresponding to the user terminal, the channel state information to obtain a time t ', and the user terminal ID information corresponding to the channel state.
  3. 3.如权利要求2所述的线性预编码方法,其中,在满足下述预定条件的多个信道状态信息中选择距离时刻t最近的信道状态信息:t' e [tT, t],其中:T为系统预先设定的时间门限,t为用户终端即将进行预编码的时刻。 Wherein t 'e [tT, t],: 3. A method as claimed in linear precoding according to claim 2, wherein the selected time t from the latest channel state information in a plurality of channel state information satisfies the following predetermined condition: T is a preset system time threshold, t is the time the user terminal is about to perform precoding.
  4. 4.如权利要求2所述的线性预编码方法,其中,在满足下述预定条件的多个信道状态信息中选取可利用的所有信道状态信息的平均值:t' e [tT, t],其中:T为系统预先设定的时间门限,t为用户终端即将进行预编码的时刻。 4. The linear pre-coding method according to claim 2, wherein the average of all the selected channel state information may be utilized in a plurality of channel state information satisfies the following predetermined condition: t 'e [tT, t], where: T is the system preset time threshold, t is the time the user terminal forthcoming precoding.
  5. 5.如权利要求1所述的线性预编码方法,其中,提取所述用户终端对应的各个子频带上的信道状态信息、获得该信道状态信息的时刻t'、该信道状态信息对应的各个子频带的序号f'、及该信道状态信息对应的用户终端序号。 5. The linear pre-coding method according to claim 1, wherein extracting the channel state information on the frequency band of each sub-user corresponding to the terminal, obtains the channel state information of the time t ', each of the sub-channel state information corresponding to band number f ', and the channel state information corresponding to the user terminal number.
  6. 6.如权利要求5所述的线性预编码方法,其中,在满足下述预定条件的多个信道状态信息中选择距离时刻t最近并且距离子频带f最近的信道状态信息:t' e [tT, t],其中:T为系统预先设定的时间门限,t为用户终端即将进行预编码的时刻;f' e [fF, f+F],其中:F为系统预先设定的子频带序号门限,f为用户终端即将进行预编码的子频带序号。 t 'e [tT: 6. The method of claim 5, wherein the linear precoding in a time t from the nearest and nearest distance f subband channel state information, wherein selecting the plurality of channel state information satisfies the predetermined condition in , t], where: T is the system preset time threshold, t is the time the user terminal forthcoming precoding; f 'e [fF, f + F], where: F is the sub-band pre-set number system threshold, f is forthcoming user terminal precoded sub-band number.
  7. 7.如权利要求5所述的线性预编码方法,其中,在满足下述预定条件的多个信道状态信息中选取可利用的所有信道状态信息的平均值:t' e [tT, t],其中:T为系统预先设定的时间门限,t为用户终端即将进行预编码的时刻;f' e [fF, f+F],其中:F为系统预先设定的子频带序号门限,f为用户终端即将进行预编码的子频带序号。 7. The linear pre-coding method according to claim 5, wherein the average of all the selected channel state information may be utilized in a plurality of channel state information satisfies the following predetermined condition: t 'e [tT, t], where: T is the system preset time threshold, t is the time the user terminal is about to perform precoding; f 'e [fF, f + F], where: F is the system a predetermined sub-band number threshold, f is the user terminal is about precoded sub-band number.
  8. 8.如权利要求1所述的线性预编码方法,其中,采用发射波束赋形的方法计算线性预编码矩阵。 8. The linear pre-coding method according to claim 1, wherein the transmit beamforming using the method of calculating the linear pre-coding matrix.
  9. 9.如权利要求1所述的线性预编码方法,其中,如果不存在满足预定条件的信道状态信息,则基站或者终端通过控制信令请求终端或者基站发送未预编码的导频符号。 9. The linear pre-coding method according to claim 1, wherein, if the channel state information satisfies a predetermined condition does not exist, the base station or the terminal requesting the terminal by the base station transmits the control signaling or non-precoded pilot symbols.
  10. 10.如权利要求1所述的线性预编码方法,其中,在同一个TDD系统的基站中进行下行方向的线性预编码;在终端中进行上行方向的线性预编码。 Linear pre-coding for the upstream direction in the terminal; 10. The linear pre-coding method according to claim 1, wherein the linear pre-coding in the downlink direction the base station with a TDD system.
  11. 11. 一种TDD系统的线性预编码装置,其特征在于,包含:信道状态信息收集器,用于接收用户终端所对应的导频符号并根据未进行线性预编码的导频符号提取其对应的信道状态信息;信道状态信息寄存器,用于存储提取的信道状态信息;信道状态信息选择器,用于从信道状态信息寄存器中,选择满足预定条件的信道状态信息,所述预定条件为:t' e [tT,t],其中:t'为用户终端获得对应的信道状态信息的时刻,T为系统预先设定的时间门限,t为用户终端即将进行预编码的时刻;预编码矩阵计算器,用于根据选择的信道状态信息计算线性预编码矩阵;以及预编码器,用于根据该线性预编码矩阵对数据符号及其伴随的导频符号进行线性预编码操作。 A linear pre-coding apparatus of the TDD system, characterized by comprising: channel state information collector for receiving the user terminal corresponding to the extracted pilot symbols and the corresponding pilot symbols is not performed in accordance with linear precoding channel state information; and the channel state information register, channel state for storing extracted information; channel state information selector for selecting from the channel state information register satisfies a predetermined condition the channel state information, the predetermined condition is: t ' e [tT, t], wherein: the channel state t 'for the user terminal to obtain a corresponding time information, T is the system preset time threshold, t is the user terminal upcoming time precoding; precoding matrix calculator, for calculating linear precoding matrix selected according to a channel state information; and a pre-encoder for linear precoding operation on the data symbols and pilot symbols accompanying the basis of the linear pre-coding matrix.
  12. 12.如权利要求11所述的线性预编码装置,其中,所述信道状态信息收集器,用于提取所述用户终端对应的信道状态信息、获得该信道状态信息的时刻t'、及该信道状态信息对应的用户终端序号。 12. The linear pre-coding apparatus 11 according to the channel, wherein the channel state information collector for extracting the channel state information corresponding to the user terminal, the channel state information to obtain a time t ', and status information corresponding to the user terminal number.
  13. 13.如权利要求12所述的线性预编码装置,其中,所述信道状态信息选择器,进一步用于在满足下述预定条件的多个信道状态信息中选择距离时刻t最近的信道状态信息: t' e [tT,t],其中:T为系统预先设定的时间门限,t为用户终端即将进行预编码的时刻。 13. The linear pre-coding apparatus according to claim 12, wherein the channel state information selector, the time information is further for selecting t from the nearest channel state information of the plurality of channel state satisfies the following predetermined condition: t 'e [tT, t], where: T is the system preset time threshold, t is the time the user terminal forthcoming precoding.
  14. 14.如权利要求12所述的线性预编码装置,其中,所述信道状态信息选择器,进一步用于在满足下述预定条件的多个信道状态信息中选取可利用的所有信道状态信息的平均值: t' e [tT,t],其中:T为系统预先设定的时间门限,t为用户终端即将进行预编码的时刻。 14. The linear pre-coding apparatus according to claim 12, wherein the channel state information selector is further for selecting an average in a plurality of available channel state information satisfies the predetermined condition in the channel state information of all channels value: t 'e [tT, t], where: T is the system preset time threshold, t is the time the user terminal forthcoming precoding.
  15. 15.如权利要求11所述的线性预编码装置,其中,所述信道状态信息收集器,用于提取所述用户终端对应的各个子频带上的信道状态信息、获得该信道状态信息的时刻t'、该信道状态信息对应的各个子频带的序号f'、及该信道状态信息对应的用户终端序号。 Time t 15. The linear pre-coding apparatus according to claim 11, wherein the channel state information collector for channel state information on each sub-band corresponding to the terminal extracts the user, obtains the channel state information ', the channel state information corresponding to each sub-band number F', and the channel state information corresponding to the user terminal number.
  16. 16.如权利要求15所述的线性预编码装置,其中,所述信道状态信息选择器,进一步用于在满足下述预定条件的多个信道状态信息中选择距离时刻t最近并且距离子频带f最近的信道状态信息:t' e [tT, t],其中:T为系统预先设定的时间门限,t为用户终端即将进行预编码的时刻;f' e [fF, f+F],其中:F为系统预先设定的子频带序号门限,f为用户终端即将进行预编码的子频带序号。 16. The linear pre-coding apparatus according to claim 15, wherein the channel state information selector is further for selecting a plurality of time from the channel state information satisfies the predetermined condition and the distance of the nearest sub-band t f latest channel state information: t 'e [tT, t], where: T is the system preset time threshold, t is the user terminal upcoming time precoding; f' e [fF, f + F], where : F is the sub-band system preset threshold number, f is the forthcoming user terminal precoded sub-band number.
  17. 17.如权利要求15所述的线性预编码装置,其中,所述信道状态信息选择器,进一步在满足下述预定条件的多个信道状态信息中选取可利用的所有信道状态信息的平均值:t' e [tT, t],其中:T为系统预先设定的时间门限,t为用户终端即将进行预编码的时刻;f' e [fF, f+F],其中:F为系统预先设定的子频带序号门限,f为用户终端即将进行预编码的子频带序号。 17. The linear pre-coding apparatus according to claim 15, wherein the channel state information selector, further satisfying all of the average channel state information of the plurality of channel state information following the predetermined condition selected available: t 'e [tT, t], where: T is the system preset time threshold, t is the user terminal forthcoming precoding time; f' e [fF, f + F], where: F is the system preset subband set threshold number, f is the forthcoming user terminal precoded sub-band number.
  18. 18.如权利要求11所述的线性预编码装置,其中,所述预编码矩阵计算器,采用发射波束赋形的方法计算线性预编码矩阵。 18. The linear pre-coding apparatus according to claim 11, wherein the precoding matrix calculator for calculating the linear pre-coding matrix using transmit beamforming method.
  19. 19.如权利要求11所述的线性预编码装置,其中,进一步包括控制信令发送器,用于发送控制信令请求基站或者终端发送未预编码的导频符号。 19. The linear pre-coding apparatus according to claim 11, wherein the control signaling comprises a further transmitter for transmitting the control signaling sent by the terminal does not request the base station or precoded pilot symbols.
  20. 20.如权利要求11所述的线性预编码装置,其中,在同一个TDD系统的基站侧线性预编码装置,用于进行下行方向的线性预编码;终端侧线性预编码装置,用于进行上行方向的线性预编码。 20. The linear pre-coding apparatus according to claim 11, wherein the base station side device with a linear pre-coding a TDD system, the linear pre-coding for the downlink direction; terminal side linear pre-coding means for performing uplink linear precoding direction.
CN 200610087109 2006-06-09 2006-06-09 Linear pre-coding method and device of TDD system CN101087169B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 200610087109 CN101087169B (en) 2006-06-09 2006-06-09 Linear pre-coding method and device of TDD system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 200610087109 CN101087169B (en) 2006-06-09 2006-06-09 Linear pre-coding method and device of TDD system

Publications (2)

Publication Number Publication Date
CN101087169A true CN101087169A (en) 2007-12-12
CN101087169B true CN101087169B (en) 2012-06-06

Family

ID=38937964

Family Applications (1)

Application Number Title Priority Date Filing Date
CN 200610087109 CN101087169B (en) 2006-06-09 2006-06-09 Linear pre-coding method and device of TDD system

Country Status (1)

Country Link
CN (1) CN101087169B (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8503375B2 (en) 2007-08-13 2013-08-06 Qualcomm Incorporated Coding and multiplexing of control information in a wireless communication system
CN101459634B (en) * 2007-12-14 2011-06-01 华为技术有限公司 Method and base station for sending downlink signal
CN101242381B (en) 2008-03-13 2011-01-05 上海交通大学 Linear pre-coding method for multi-input and multi-output system
CN101800571B (en) 2009-02-06 2013-05-15 电信科学技术研究院 Method, system and device for treating data in high-speed packet access evolution system
CN101969364B (en) 2009-07-28 2013-06-05 华为技术有限公司 Multi-antenna sending method and device
US9172513B2 (en) 2010-10-11 2015-10-27 Qualcomm Incorporated Resource assignments for uplink control channel

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1474608A (en) 2002-08-05 2004-02-11 深圳市中兴通讯股份有限公司 Signal transmitting and receiving method based on time-division duplexing in radio communication system
CN1539230A (en) 2001-06-22 2004-10-20 高通股份有限公司 Method and apparatus for transmitting data in time division duplex system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1539230A (en) 2001-06-22 2004-10-20 高通股份有限公司 Method and apparatus for transmitting data in time division duplex system
CN1474608A (en) 2002-08-05 2004-02-11 深圳市中兴通讯股份有限公司 Signal transmitting and receiving method based on time-division duplexing in radio communication system

Also Published As

Publication number Publication date Type
CN101087169A (en) 2007-12-12 application

Similar Documents

Publication Publication Date Title
Love et al. What is the value of limited feedback for MIMO channels?
Jafar et al. Multiple-antenna capacity in correlated Rayleigh fading with channel covariance information
US7139328B2 (en) Method and apparatus for closed loop data transmission
US7110378B2 (en) Channel aware optimal space-time signaling for wireless communication over wideband multipath channels
Wong et al. A joint-channel diagonalization for multiuser MIMO antenna systems
US7079867B2 (en) Semi-blind transmit antenna array device using feedback information and method thereof in a mobile communication system
Herath et al. Energy detection of unknown signals in fading and diversity reception
US20080225960A1 (en) Generalized reference signaling scheme for MU-MIMO using arbitrarily precoded reference signals
US7149254B2 (en) Transmit signal preprocessing based on transmit antennae correlations for multiple antennae systems
US7610036B2 (en) Space-time-frequency sensing of RF spectrum in cognitive radios
US6987819B2 (en) Method and device for multiple input/multiple output transmit and receive weights for equal-rate data streams
US20050105632A1 (en) System and method for channel bonding in multiple antenna communication systems
Yang et al. Performance of conjugate and zero-forcing beamforming in large-scale antenna systems
US20070211813A1 (en) MIMO precoding in the presence of co-channel interference
Zhou et al. How accurate channel prediction needs to be for transmit-beamforming with adaptive modulation over Rayleigh MIMO channels?
US6473393B1 (en) Channel estimation for OFDM systems with transmitter diversity
US20060165191A1 (en) MIMO channel feedback protocols
US20070155336A1 (en) Apparatus and method for eliminating multi-user interference
US6963619B1 (en) Spatial separation and multi-polarization of antennae in a wireless network
US20080043865A1 (en) Method and apparatus for transmitting/receiving feedback information and system supporting the same in a multi-user multi-antenna system
EP1505741A2 (en) Method and apparatus for scheduling multiple users in a mobile communication system using multiple transmit/receive antennas
EP1895680A2 (en) Apparatus and method for transmitting/receiving data in a multi-antenna system, and system using the same
US20090203335A1 (en) Apparatus and method for partial adaptive transmission in multiple-input multiple-output system
US20070183362A1 (en) Method and apparatus for performing spatial-division multiple access
CN101686110A (en) Multi-input multi-output system, data transmission method and data transmission device thereof

Legal Events

Date Code Title Description
C06 Publication
C10 Request of examination as to substance
C14 Granted
C56 Change in the name or address of the patentee
C56 Change in the name or address of the patentee