CN106330273A - Pre-coding method and device - Google Patents

Pre-coding method and device Download PDF

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Publication number
CN106330273A
CN106330273A CN201510388477.6A CN201510388477A CN106330273A CN 106330273 A CN106330273 A CN 106330273A CN 201510388477 A CN201510388477 A CN 201510388477A CN 106330273 A CN106330273 A CN 106330273A
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China
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codebook
channel
feedback
terminal
vector
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CN201510388477.6A
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Chinese (zh)
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任余维
苏昕
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电信科学技术研究院
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Publication of CN106330273A publication Critical patent/CN106330273A/en

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413MIMO systems
    • H04B7/0452Multi-user MIMO systems
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413MIMO systems
    • H04B7/0456Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting

Abstract

The invention discloses a pre-coding method and device. The method comprises: an approximate channel h is outputted at a terminal; according to the approximate channel h, each codebook vector in a codebook is evaluated, wherein the codebook is one known by a base station and the terminal; and on the basis of the evaluation result, the codebook vectors are fed back to the base station. The base station side receives the codebook vectors fed back by the terminal, wherein the codebook vectors are obtained by evaluation on the codebook vectors in the codebook based on the approximate channel h; an analog pre-coding matrix is formed based on the codebook vectors; and an equivalent channel is obtained according to the analog pre-coding matrix. Therefore, the terminal can adjust the number of the fed-back codebook vectors dynamically to realize adaption to base stations with different digital channel numbers, so that all digital channel resources can be utilized fully. Moreover, analog and digital pre-coding precision during the analog-digital two-stage pre-coding process can be improved and the channel feedback costs are reduced.

Description

一种预编码方法及装置 An encoding method and apparatus for pre-

技术领域 FIELD

[0001] 本发明涉及无线通信技术领域,特别涉及一种预编码方法及装置。 [0001] The present invention relates to wireless communication technologies, and in particular, to a pre-coding method and apparatus.

背景技术 Background technique

[0002] 为了降低Massive MIMO技术的实现成本与设备复杂度,以及减少大量收发信机所带来的传输速率需求和大量的CSI-RS(channel state information reference signal,信道状态信息参考信号)所带来的资源开销,近年来有人提出采用数模混合预编码技术。 [0002] In order to reduce implementation cost and complexity of the apparatus Massive MIMO technology, and reduce the amount brought transceiver and a transmission rate needs a lot of CSI-RS (channel state information reference signal, channel state information reference signal) carried by to resource overhead, in recent years, it was suggested that the use of digital and analog mixed pre-coding technology.

[0003] 图1为数模混合预编码结构示意图,如图所示,所谓数模混合预编码,是指在传统的DBF (Digital Beam Forming,数字波束形成)的数字域预编码D基础上,在靠近天线系统的前端,在ABF(Analog Beam Forming,模拟波束形成)的射频信号上增加一级模拟预编码A。 [0003] FIG 1 hybrid digital-analog precoding structure diagram, as shown, a so-called mixed-precoded digital domain precoding means D base in the conventional DBF (Digital Beam Forming, digital beamforming) on, near the front end of the antenna system, an increase in the analog precoding ABF (analog beam forming, analog beamforming) RF signal A. 模拟预编码能够通过较为简单的方式,使发送信号与信道实现较为粗略的匹配。 Analog precoding through relatively simple manner, the transmission signal channel realizations coarser match. 模拟预编码后形成的等效信道的维度小于实际的天线数量,因此其后所需的AD/ DA(A :Analog,模拟;D :Digital,数字)转换器件、数字通道数以及相应的基带处理复杂度都可以大为降低。 Equivalent channel formed after the analog precoded dimension less than the actual number of antennas, thus the required subsequent AD / DA (A: Analog, simulation; D: Digital, digital) conversion device, the number of channels and the corresponding digital baseband complexity can be greatly reduced. 模拟预编码部分残余的干扰可以在数字域再进行一次处理,从而保证MU-MIMO (MultipleUsers-MIMO,多用户MIM0)传输的质量。 Analog pre-coding portion of the residual interference may once again be processed in the digital domain, so as to ensure the quality of MU-MIMO (MultipleUsers-MIMO, Multi-user MIM0) transmission.

[0004] 相对于全数字预编码而言,数模混合预编码是性能与复杂度的一种折中方案,在高频段大带宽或天线数量很大的系统中具有较高的实用前景。 [0004] with respect to the digital pre-coding purposes, mixed Precoding is a compromise in performance and complexity, high practical prospect of large bandwidth at high frequency or a large number of antenna systems.

[0005] 现有技术中,数模混合预编码的至少存在以下不足:在实践中采用的方案下模拟域预编码精度受限,而如需提高精度,则模拟域预编码反馈资源开销较大。 [0005] In the prior art, mixed precoded at least the following deficiencies: limited accuracy of the analog domain precoding scheme employed in the practice, and To improve the accuracy of the analog domain precoding feedback resource overhead larger .

发明内容 SUMMARY

[0006] 本发明提供了一种预编码方法及装置,用以在数模混合预编码处理过程中在保证模拟和数字预编码的精度时,减少信道反馈开销。 [0006] The present invention provides a pre-coding method and apparatus for the pre-mixed-encoding process to ensure accuracy when the analog and digital precoding, channel feedback overhead reduction.

[0007] 本发明实施例中提供了预编码方法,包括: [0007] Providing a pre-coding method in the embodiment of the present invention, comprising:

[0008] 在终端上输出近似信道h; [0008] The output terminal on the channel approximately H;

[0009] 根据近似信道h对码本中的码本向量进行评估,所述码本是基站与终端所共知的码本; [0009] The approximation of the channel h codebook assess codebook vector, the codebook is known to the base station and terminal codebook;

[0010] 根据评估结果向基站反馈码本向量。 [0010] feedback codebook vector to the base station based on the evaluation.

[0011] 较佳地,所述近似信道h是基于Los径角度确定的近似信道h,或,基于下行码本测量的方式确定的近似信道h。 [0011] Preferably, the channel h is approximated based on the determined angle is approximately Los diameter channel h, or determined based on a downlink measurement according to the present embodiment is approximately the code channel h.

[0012] 较佳地,对码本中的码本向量进行评估是基于SNR准则或SINR准则进行评估的。 [0012] Preferably, the codebook of codebook vectors is evaluated based on the SINR or SNR criteria for evaluation criterion.

[0013] 较佳地,终端向基站反馈拥有最大SNR值或者SINR值的码本向量。 [0013] Preferably, the terminal feeds back SINR or SNR value has the largest value of the codebook vectors to the base station.

[0014] 较佳地,进一步包括:在向基站反馈码本向量时,反馈这些向量对应的SNR值或SmR 值。 [0014] Preferably, further comprising: when the feedback codebook vector to the base station, the feedback SmR or SNR value corresponding to the value of these vectors.

[0015] 较佳地,向基站反馈码本向量时反馈M个码本向量,M为数字通道数。 Feedback codebook vectors when M [0015] Preferably, the feedback codebook vector to the base station, M is the number of digital channels.

[0016] 本发明实施例中提供了一种预编码方法,包括: [0016] The embodiment provides a pre-coding method of the present invention, comprising:

[0017] 接收终端反馈的码本向量,所述码本向量是终端根据近似信道h对码本中的码本向量进行评估后获得的; [0017] The receiving terminal feeds back codebook vector is the codebook vector according to the approximate end of the channel h codebook assess codebook vector obtained;

[0018] 根据所述码本向量构成模拟预编码矩阵; [0018] The precoding matrix codebook vector composed of the simulation;

[0019] 根据模拟预编码矩阵获得等效信道。 [0019] According to the simulation to obtain equivalent channel precoding matrix.

[0020] 较佳地,所述根据所述码本向量输出模拟预编码矩阵,包括: [0020] Preferably, the codebook vector according to the output of the analog pre-coding matrix, comprising:

[0021] 在接收到终端反馈的码本向量后,确定所述码本向量被终端反馈的次数; [0021] After receiving terminal feeds back codebook vector, determining the number of times the codebook vector is fed back to the terminal;

[0022] 选择次数最多的前M个码本向量构成模拟预编码矩阵,M为数字通道数。 [0022] M before selecting the highest number of codebook vectors constituting the precoding matrix analog, M being the number of digital channels.

[0023] 较佳地,进一步包括:在接收终端向基站反馈码本向量时,接收所述码本向量对应的SNR值或SINR值。 [0023] Preferably, further comprising: a feedback codebook vector to the base station at the receiving terminal, the received SNR value or a SINR value corresponding to the codebook vector.

[0024] 较佳地,在接收终端向基站反馈的码本向量及所述码本向量对应的SNR值或SINR 值后,根据码本向量对应的SNR值或SINR值数确定码本向量的容量,选择容量最大的前M 个码本向量为模拟预编码矩阵,M为数字通道数。 [0024] Preferably, after the value of the SNR or SINR values ​​fed back by the receiving terminal to the base station and the codebook vectors corresponding to the codebook vector is determined according to the capacity of the codebook vectors corresponding to the codebook vector or SNR value SINR values selecting the maximum capacity of the first M codebook vectors analog precoding matrix, M is the number of digital channels.

[0025] 较佳地,根据模拟预编码矩阵获得等效信道,包括: [0025] Preferably, obtaining an equivalent channel according to the analog pre-coding matrix, comprising:

[0026] 获取每个终端的近似信道h,并组成近似信道h ; [0026] Each terminal acquires approximate channel h, and the approximate composition H channel;

[0027] 根据模拟预编码矩阵与近似信道h获得等效信道。 [0027] According to the simulation to obtain the equivalent channel matrix and the precoding channel approximation h.

[0028] 本发明实施例中提供了一种预编码装置,包括: [0028] The embodiments of the present invention there is provided a pre-coding apparatus, comprising:

[0029] 信道模块,用于在终端上输出近似信道h ; [0029] The channel module configured to approximate the output terminal on the channel H;

[0030] 评估模块,用于根据近似信道h对码本中的码本向量进行评估,所述码本是基站与终端所共知的码本; [0030] Evaluation module for approximation of the channel h codebook assess codebook vector, the codebook is known to the base station and terminal codebook;

[0031 ] 反馈模块,用于根据评估结果向基站反馈码本向量。 [0031] The feedback module, for feeding back the codebook vector to the base station based on the evaluation.

[0032] 较佳地,信道模块进一步用于基于Los径角度确定近似信道h,或,基于下行码本测量的方式确定近似信道h。 [0032] Preferably, the channel module further configured to determine an approximate channel h, or to determine the approximate code based on the downlink channel h measured according to the present embodiment based Los path angle.

[0033] 较佳地,评估模块进一步用于基于SNR准则或SINR准则对码本中的码本向量进行评估。 [0033] Preferably, the evaluation module is further adapted to assess codebook vector based on codebook SINR or SNR criteria guidelines.

[0034] 较佳地,反馈模块进一步用于向基站反馈拥有最大SNR值或者SINR值的码本向量。 [0034] Preferably, the feedback module is further configured to have the largest SNR value or feedback SINR value of the codebook vectors to the base station.

[0035] 较佳地,反馈模块进一步用于在向基站反馈码本向量时,反馈所述码本向量对应的SNR值或SINR值。 [0035] Preferably, the feedback module is further configured to, when the feedback codebook vector to the base station, the feedback SINR value or SNR value of the corresponding codebook vector.

[0036] 较佳地,反馈模块进一步用于在向基站反馈码本向量时反馈M个码本向量,M为数字通道数。 [0036] Preferably, the feedback module is further configured to feedback M codebook vectors when the feedback codebook vector to the base station, M is the number of digital channels.

[0037] 本发明实施例中提供了一种预编码装置,包括: [0037] The embodiments of the present invention there is provided a pre-coding apparatus, comprising:

[0038] 接收模块,用于接收终端反馈的码本向量,所述码本向量是终端根据近似信道h 对码本中的码本向量进行评估后获得的; [0038] a receiving module, configured to receive a terminal feeds back codebook vector is the codebook vector according to the approximate end of the channel h codebook assess codebook vector obtained;

[0039] 模拟预编码矩阵模块,用于根据所述码本向量构成模拟预编码矩阵; [0039] The analog module precoding matrix, the precoding matrix configured in accordance with the codebook vector analog;

[0040] 等效信道模块,用于根据模拟预编码矩阵获得等效信道。 [0040] The equivalent channel means for obtaining an equivalent channel according to the analog pre-coding matrix.

[0041] 较佳地,模拟预编码矩阵模块进一步用于在接收到终端反馈的码本向量后,确定码本向量被终端反馈的次数,选择次数最多的前M个码本向量构成模拟预编码矩阵,M为数字通道数。 [0041] Preferably, the analog is further precoding matrix module for the terminal after receiving the feedback codebook vector, determining the number of codebook vectors fed back by the terminal, the highest number of selected first M codebook vectors constituting the precoding analog matrix, M being the number of digital channels.

[0042] 较佳地,接收模块进一步用于在接收终端向基站反馈码本向量时,接收所述码本向量对应的SNR值或SINR值。 [0042] Preferably, the receiving module is further SINR value or values ​​for SNR at the receiving terminal feeds back the codebook vector to the base station, receives the corresponding codebook vector.

[0043] 较佳地,模拟预编码矩阵模块进一步用于在接收终端向基站反馈的码本向量及所述码本向量对应的SNR值或SINR值后,根据码本向量对应的SNR值或SINR值数确定码本向量的容量,选择容量最大的前M个码本向量为模拟预编码矩阵,M为数字通道数。 [0043] Preferably, the analog module the precoding matrix is ​​further configured to, after receiving SNR value or a SINR value of the feedback terminal to the base station and the codebook vectors corresponding to the codebook vectors, or according to the SNR value corresponding to the SINR codebook vector capacity values ​​determined codebook vectors, selecting the maximum capacity of the top M codebook vectors analog precoding matrix, M is the number of digital channels.

[0044] 较佳地,等效信道模块进一步用于在根据模拟预编码矩阵获得等效信道时,获取每个终端的近似信道h,并组成近似信道h ;根据模拟预编码矩阵与近似信道h获得等效信道。 [0044] Preferably, the equivalent channel module is further used in obtaining the equivalent channel from the analog pre-coding matrix, obtaining an approximate channel h each terminal, and the approximate composition channel h; The simulation precoding matrix approximate channel h to obtain equivalent channel.

[0045] 本发明有益效果如下: [0045] Advantageous effects of the present invention are as follows:

[0046] 现有的方案中,模拟域基于空间角度搜索的方法,对各个角度方向的码本向量进行评估,终端反馈评估的信息。 [0046] The conventional scheme, the analog domain method based on the search space angle, the angular direction of each of the code vectors of the present evaluation, the terminal feedback evaluation. 对于3D-MHTO系统而言,搜索的3D空间非常大,垂直维需0-90、水平维需0-180度。 For 3D-MHTO system, 3D search space is very large, the vertical dimension need to 0-90, 0-180 degrees horizontal dimension required. 如果为了实现精确的搜索,小步长引入的反馈资源开销和延迟是非常大的。 If in order to achieve accurate search, feedback resource overhead and delay the introduction of small steps is very large. 例如,在水平维范围内0-180度搜索,如果步长为1度,需要180次反馈,此时每个用户的码本向量可以精确到1度。 E.g., 0-180 degrees within a horizontal search range of dimensions, if the step length is 1 degree, it is necessary feedback 180, then each user codebook vector is accurate to 1 degree.

[0047] 本发明实施例提供的技术方案中,由终端确定码本向量作为最终模拟域预编码, 并直接提供给基站;基站据此来确定模拟预编码矩阵,并获取等效信道。 Embodiment [0047] The present invention provides the technical solutions, the terminal determines codebook vectors as the final analog domain precoding, and directly to the base station; the base station from which to determine a simulated pre-coding matrix, and to obtain equivalent channel. 由于终端和基站共享同一个码本,终端基于近似信道h对于所有码本向量进行评估。 Since the terminal and the base station share the same codebook, terminal based on the channel h is approximately evaluated for all the codebook vectors. 如果终端的码本包含180 个码本向量,此时就可以以1度的间隔覆盖水平维0-180度。 If the code of the terminal according to the present vectors comprising 180 yards, then you can dimensional 0-180 degrees at intervals of 1 degree horizontal coverage. 虽然近似信道h评估码本可能无法确保码本向量精确到1度,但是通过本方案提供的终端码本评估方式以及基站端确定模拟预编码方式,可以整体上减少码本间干扰,弥补精确度的不足。 Although the approximate channel h assess codebook may not ensure codebook vector accuracy to 1 degree, but the terminal code present evaluation mode and the base station terminal provided by the present scheme determination analog precoding method, a whole can reduce inter-code this interference, to make up for accuracy deficiencies. 而完成所有的评估之后,只需反馈1次评估结果,也即,在本方案因码本间干扰减少使得精确度与现有的方案大致相当的情况下,与现有的方案需要反馈多次相比,极大地减少了反馈开销和延迟。 After all of the evaluation, only a feedback assessment results, i.e., in the present embodiment of the present inter-code interference due to reduced accuracy and that the existing programs is substantially equivalent to the case with the conventional solution requires multiple feedback compared to greatly reduce the feedback overhead and delay. 同时, 采用本发明实施例提供的技术方案终端可以动态调整反馈模拟码本向量数目,这样可以适应不同基站端的数字通道数目,充分利用不同所有的数字通道资源。 Meanwhile, using the embodiment of the present invention, the technical solutions provided by the terminal may dynamically adjust the number of analog feedback vector of the present code, which can accommodate the number of digital channels of different base side, full use of all the different channels of the digital resources.

附图说明 BRIEF DESCRIPTION

[0048] 此处所说明的附图用来提供对本发明的进一步理解,构成本发明的一部分,本发明的示意性实施例及其说明用于解释本发明,并不构成对本发明的不当限定。 [0048] The drawings described herein are provided for further understanding of the present invention, constituting part of the invention, exemplary embodiments of the present invention are used to explain the present invention without unduly limiting the present invention. 在附图中: In the drawings:

[0049] 图1为现有技术中数模混合预编码结构示意图; [0049] FIG. 1 is a schematic view of a pre-mixed digital-analog prior art coding structure;

[0050] 图2为本发明实施例中有限反馈模数架构预编码算法实施流程示意图; [0050] FIG. 2 is a schematic diagram of the architecture of the limited feedback precoding modulus algorithm implementation process embodiment of the invention;

[0051] 图3为本发明实施例中终端侧的预编码方法实施流程示意图; The precoding method [0051] FIG. 3 is an embodiment of the terminal side schematic flow chart of embodiment;

[0052] 图4为本发明实施例中基站侧预编码方法实施流程示意图; [0052] FIG. 4 schematic flowchart of an embodiment base station side precoding method embodiment of the present invention;

[0053] 图5为本发明实施例中终端侧预编码装置结构示意图; [0053] Fig 5 a schematic view of a pre-coding apparatus structure of the terminal-side embodiments of the present invention;

[0054] 图6为本发明实施例中基站侧预编码装置结构示意图; [0054] Fig 6 a schematic view of a pre-coding apparatus side structure of the embodiment of the present invention, a base station;

[0055] 图7为本发明实施例中终端结构示意图; [0055] FIG. 7 is a schematic configuration example of the terminal embodiment of the present invention;

[0056] 图8为本发明实施例中基站结构示意图。 [0056] Figure 8 a schematic view of the structure of a base station in the embodiment of the present invention.

具体实施方式 Detailed ways

[0057] 下面结合附图对本发明的具体实施方式进行说明。 [0057] DETAILED DESCRIPTION OF THE DRAWINGS Embodiment of the present invention will be described.

[0058] 发明人在发明过程中注意到: [0058] The inventors have noted that in the process of the invention:

[0059] 鉴于MIMO (Multiple Input Multiple Output,多入多出)技术对于提高峰值速率与系统频谱利用率的重要作用,LTE (Long Term Evolution,长期演进)/ LTE-A (LTE-Advanced,长期演进升级)等无线接入技术标准都是以M頂0+0FDM (Orthogonal Frequency Division Multiplexing,正交频分复用)技术为基础构建起来的。 [0059] In view of MIMO (Multiple Input Multiple Output, MIMO) technology is an important role for improving the spectral efficiency and peak rate system, LTE (Long Term Evolution, Long Term Evolution) / LTE-A (LTE-Advanced, LTE upgrade) and other wireless access technologies are based on the standard top M 0 + 0FDM (orthogonal frequency division multiplexing, orthogonal frequency-division multiplexing) technology to build up. MIMO技术的性能增益来自于多天线系统所能获得的空间自由度,因此MMO技术在标准化发展过程中的一个最重要的演进方向便是维度的扩展。 MIMO technology performance gain from spatial degrees of freedom available to multi-antenna systems, and therefore one of the most important evolution in the direction of MMO technology standardization development process is extended dimension.

[0060] 为了进一步提升MIMO技术,移动通信系统中引入大规模天线技术(Massive MHTO)。 [0060] In order to further enhance the MIMO technology, a mobile communication system, the introduction of large-scale antenna technology (Massive MHTO). 学术研究与初步的信道实测结果表明,Massive MHTO技术将能够极大地提升系统频带利用效率,支持更大数量的接入用户。 Academic research and preliminary experimental results show that channel, Massive MHTO technology will greatly enhance the utilization efficiency of the system band, support a larger number of access users. 因此各大研究组织均将Massive MHTO技术视为下一代5G移动通信系统中最有潜力的物理层技术之一。 So the major research organizations are the Massive MHTO technology as one of the next generation 5G mobile communication system is the most promising physical layer technologies.

[0061] 如果Massive MIMO基站系统采用传统PAS (Passive Antenna System,被动天线系统)天线结构,这种架构中,多个天线端口(每个端口对应着独立的射频-中频-基带通道)水平排列,而每个端口对应的垂直维的多个阵子之间由射频电缆连接。 [0061] If the base station Massive MIMO system employs conventional PAS (Passive Antenna System, passive antenna system) antenna structure, this architecture, a plurality of antenna ports (each port corresponding to an independent RF - IF - baseband channel) arranged horizontally, time around and between the plurality of ports each connected to the corresponding vertical dimension by the RF cable. 此时,只能在水平维通过对不同端口间的相对幅度/相位的调整实现对各个终端信号在水平维空间特性的优化,在垂直维则只能采用统一的扇区级预编码。 In this case, only the relative amplitude adjustment between the different ports / phase signals to each terminal to achieve optimization of the spatial characteristics in the horizontal dimension, the vertical dimension can only be unified sector level in the horizontal dimension by pre-coding. 这样,就会严重的限制了系统垂直维空间分辨率、进而约束了系统整体性能的增强。 Thus, the system will seriously limits the spatial resolution of the vertical dimension, thus enhancing the overall performance of the restraint system. 所以,PAS结构并不适合未来Massive M頂0系统。 Therefore, PAS structure is not suitable for future system Massive M 0 top.

[0062] 如果移动通信系统中引入AAS(Active Antenna System,主动天线系统)技术, 那么基站天线系统能够在垂直维获得更大的自由度,能够在三维空间实现对UE(User Equipment,用户设备)级的信号优化。 [0062] If the mobile communication system introduced AAS (Active Antenna System, the active antenna system) technology, it is possible to dimension the base station antenna system is obtained more freedom in the vertical can be achieved for UE (User Equipment, user equipment) in three-dimensional space the signal level optimization. 尽管采用AAS技术可以实现最大化的空间分辨率以及最优MU-M頂0性能,但是这种结构需要大量的AD/DA转换器以及大量完整的射频-基带处理通道,无论是对于设备成本还是基带处理复杂度都将是巨大的负担。 While using AAS technique may maximize spatial resolution and most MU-M 0 top performance, but this structure requires a large number of AD / DA converter and many complete RF - baseband channel, both for cost or equipment the baseband processor complexity will be a huge burden. 这一问题在高频段、大带宽时显得尤为突出。 The issue in the high frequency range, high-bandwidth is particularly prominent. 另外,如果与PAS结构相比,相同天线阵子数目前提下,AAS结构对应着更多的参考信号端口。 Further, if compared with the PAS structure, the same number of antenna elements provided, AAS more structures corresponding to the reference signal port. 考虑到信道状态信息的空间分辨率直接取决于此端口数目,若获得每个天线端口的信道信息,则AAS结构需要更多的CSI-RS,此时将消耗大量时频资源。 Taking into account the channel state information of the spatial resolution depends directly on the number of the port, if the channel information is obtained for each antenna port, the AAS structure requires more CSI-RS, this time will consume a lot of resources when frequency. 这些都是AAS技术应用的难题。 These are difficult questions of technology AAS.

[0063] 为了降低Massive MIMO技术的实现成本与设备复杂度,以及减少大量收发信机所带来的传输速率需求和大量的CSI-RS(channel state information reference signal,信道状态信息参考信号)所带来的资源开销,对于近年来开始采用的数模混合预编码技术。 [0063] In order to reduce implementation cost and complexity of the apparatus Massive MIMO technology, and reduce the amount brought transceiver and a transmission rate needs a lot of CSI-RS (channel state information reference signal, channel state information reference signal) carried by to resource overhead, mixed precoding technique recently started to be used. 相对于全数字预编码而言,数模混合预编码是性能与复杂度的一种折中方案,在高频段大带宽或天线数量很大的系统中具有较高的实用前景。 With respect to the digital pre-coding purposes, mixed Precoding is a compromise in performance and complexity, high practical prospect of large bandwidth at high frequency or a large number of antenna systems. MIMO技术中,尤其是对MU-MIMO技术而言,网络侧能够获得的信道状态信息精度将直接决定预编码/预编码的精度与调度算法的效能,从而影响到整体系统性能。 MIMO technology, especially for MU-MIMO technology, the accuracy of channel state information network can be obtained directly determine the effectiveness of the pre-coding / precoding accuracy and scheduling algorithm, thus affecting the overall system performance. 因此,信道状态信息的获取一直是MMO技术标准化中最核心的问题之一。 Therefore, the channel state of access to information has been one of the core issues MMO technology standardization.

[0064] 混合架构中信道状态信息和预编码的难点在于,根据目前的LTE信号结构,使用的参考信号都是安插在基带的,因此可以通过信道估计获取数字预编码所需的信道状态。 [0064] The hybrid architecture channel state difficulties and precoding is that, according to current LTE signal structure, the reference signal used is placed in the base band, and therefore can be estimated to obtain the required number precoded channel status channel. 在混合架构中,由于前端模拟预编码的处理,形成的等效数字通道数少于实际天线数,通过参考信号获得的信道矩阵的维度已经远远低于天线端所经历的完整信道矩阵的维度。 In the hybrid architecture, since the processing of the analog front end of a precoding, the number of digital channels formed by the equivalent less than the actual number of antennas, the dimensions of a channel matrix obtained by the reference signal has been far below the antenna end experienced complete channel matrix dimension . 因此,数字预编码所能获得的空间分辨率受限于数字通道数目维度,相比于完整的信道矩阵维度,干扰抑制能力受到了一定的损失。 Thus, the space available to the digital precoding resolution limited by the dimension of the number of digital channels, as compared to the full dimensions of the channel matrix, the interference suppression by a certain loss. 另外,对于模拟预编码部分而言,其处理过程更靠近物理天线一侧,相对于数字预编码而言,其MMO信道具有更高的自由度。 Further, for pre-coding the analog part, which is closer to the process side of physical antennas, with respect to a digital pre-coding, the MMO channel which has a higher degree of freedom. 然而,由于没有办法对基带插入匹配维度的参考信号进行估计,因而无论对FDD (Frequency Division Duplex,频分双工)还是TDD(Time Division Duplex,时分双工),其模拟预编码部分都无法直接获取完整的信道状态信息。 However, since there is no way to estimate the baseband signal is inserted into the matching dimension of the reference, and thus both the FDD (Frequency Division Duplex, frequency division duplex) or TDD (Time Division Duplex, Time Division Duplex), which is the analog pre-coding part of them can be directly For a complete channel state information.

[0065] 基于上述对于混合架构的分析以及相应的难点,现阶段已经有一些可行的解决办法。 [0065] Based on the above analysis for hybrid architecture and the corresponding difficulty at this stage there are already some possible solutions. 主要思想在于:第一步先实现数字域预编码,第二步实现模拟域预编码。 The main idea is that: the first step to achieve a pre-encoded digital domain, analog domain pre-coding the second step. 在第一步中, 模拟域初始化固定(如上一个周期的模拟权值沿用、或者固定的角度权值等),由于数字域维度较低,基带的参考信号可以实现对此时的信道进行准确的估计,基于准确估计的信道进行数字域预编码。 In a first step, fixing the analog domain initialization (analog weight value as follows a cycle, or a fixed angle weights, etc.), due to lower dimension of the digital domain, the reference signal of the baseband can be realized in this case accurate channel estimates, perform digital pre-coding based on accurate channel estimation. 在第二步,此时数字域预编码已经确定,模拟域的权值采用基于固定的步长在垂直维和水平维角度范围内进行搜索的方法,终端反馈每一次搜索的结果,最终选择最优的模拟域预编码向量。 In a second step, this time has been determined precoding the digital domain, the analog domain weights using the method of searching in vertical and horizontal dimension dimensional angle range based on fixed steps, each terminal feeds back the result of the search, the final choice of the best the analog domain precoding vector.

[0066] 但是,这种方法存在以下不足:第一,模拟域基于某一步长进行搜索,步长大则模拟域的精度受限,步长小则反馈资源消耗大。 [0066] However, this method has the following disadvantages: First, a search based on the analog domain by a step, the step size is limited by the accuracy of the analog domain, the step size is small feedback resource consumption. 第二,数字域测量用参考信号与解调用参考信号所采用的模拟赋形方式可能存在差异。 Second, the reference signal and a digital domain measurement solution may vary with the call reference in the analog signal shaping employed. 例如,数字域测量用参考信号是按照初始化固定的权值进行模拟赋形的(如采用某个固定的下倾角),而最终业务数据中的解调用参考信号采用的是经过第二步模拟赋形之后的权值。 For example, a digital domain measurement is made in accordance with a fixed reference signal to initialize the analog-forming weights (e.g., using a fixed downtilt), and the solution of the final service data demodulation reference signal used in the second step is the result of simulation weight after shaping. 这一差异会导致信道质量测量的不准确,从而对多用户调度、资源分配与链路自适应的性能带来影响。 This difference leads to the channel quality measurement is not accurate, and thus impact on multi-user scheduling, resource allocation and link adaptation performance. 此外,数字域需要信道估计也会造成一定的资源消耗。 In addition, the digital domain channel estimate will need a certain amount of resource consumption.

[0067] 基于此,本发明实施例中提供了一种终端侧以及基站侧的预编码方法,下面先按两阶段预编码的实施顺序先对终端侧的实施进行说明,然后再对基站测的实施进行说明, 然后对两阶段的实施进行整体说明。 [0067] Based on this, the present invention provides a embodiment of a precoding method of the base station side and the terminal side, press the following sequence of precoded embodiment two stage embodiment of the first terminal side will be described, and then measured for the base station implementation is described, then the implementation of phase two of the overall explanation. 在说明过程中,分别从终端与基站侧的实施说明并不意味着二者必须配合实施,实际上,当终端与基站分开实施时,其也各自解决终端侧、基站侧的问题,只是二者结合使用时,会获得更好的技术效果。 In the process described, respectively, from the side of the terminal and the base described embodiments does not imply that both embodiments must fit, in fact, when implemented separately terminal and base station, which is also the terminal side each to solve the problem, the base station side, but both when used in combination, it will get better technical effect.

[0068] 下面分别对终端、基站侧上的实施进行说明,说明中如无特殊说明,均假设用户数为K,数字通道数为M,天线阵子数为Ntx。 [0068] The following are embodiments of the terminal, the base station side will be described, such description unless otherwise specified, assume that the number of users is K, the number of digital channels is M, the number of antenna elements Ntx.

[0069] 图2为终端侧的预编码方法实施流程示意图,如图所示,可以包括: [0069] FIG. 2 is a terminal side precoding method a schematic flow chart of the embodiment, as shown, may include:

[0070] 步骤201、在终端上输出近似信道h ; [0070] Step 201, the terminal outputs approximately in the channel H;

[0071] 步骤202、根据近似信道h对码本中的码本向量进行评估,所述码本是基站与终端所共知的码本; [0071] Step 202, the approximate channel h codebook in codebook vector evaluating the codebook is known to the base station and terminal codebook;

[0072] 步骤203、根据评估结果向基站反馈码本向量。 [0072] Step 203, the feedback codebook vector to the base station based on the evaluation.

[0073] 实施中,所述近似信道h是基于Los径角度确定的近似信道h,或,基于下行码本测量的方式确定的近似信道h。 [0073] In embodiments, the approximation is based on the channel h Los diameter approximate angle determination channel h, or determined based on a downlink measurement according to the present embodiment is approximately the code channel h.

[0074] 步骤201中所述的近似信道h获取方式,具体实施可以如下: [0074] Step 201 is approximately in the acquisition mode channel h, particular embodiments may be as follows:

[0075] 1、直接利用LOS径(近LOS径)获得近似信道h。 [0075] 1, using the direct LOS path (path near LOS) channel is approximated by h.

[0076] 在系统预编码和信道估计之前,基站和终端之间事实上已经通过某些参考信号, 可以大致确定各个终端的方位信息,由此可得到近似Los径的垂直角度0 k和水平角度朽。 [0076] Before the pre-coding system and a channel estimation between the base station and the terminal in fact by some reference signal, position information of each terminal may be approximately determined, whereby the obtained angles Los diameter approximately perpendicular and horizontal angle 0 k rotten.

[0077] 利用已有Los径信道模型,可以得到一个近似信道h。 [0077] The use of existing Los path channel model, an approximation can be obtained channel h.

[0078] 例如,针对用户k,定义用户k的近似信道为hk,如果考虑Saleh-Valebzuela的信道模型,已知用户k的Los径传播角度(¾屬),基于下述L os径信道结构就可以得到用户k 的近似信道hk: [0078] For example, for an approximate channel of user k, defined user k is HK, considering channel models Saleh-Valebzuela of, Los propagation angle known user k (¾ genus), based on the L os path channel structure on user k can be approximated channel hk:

[0079] [0079]

Figure CN106330273AD00091

[0080] 这里0彡m彡W,0彡n彡H,W和H分别为水平方向和垂直方向的维度,Ntx为总天线数,且Ntx = WH。 [0080] where W is 0 San San m, n 0 San San H, W and H dimensions, respectively horizontal and vertical directions, the total number Ntx antennas, and Ntx = WH.

[0081] 2、基于下行测量的方式。 [0081] 2, based on the measured downlink mode.

[0082] 系统预设一个共有码本,对应于一组码本向量。 [0082] There are a codebook by default, set corresponding to a codebook vector. 码本的具体构成及波束的编号方式在通信之前由基站和终端所共知。 DETAILED codebook structure and numbering of the beam before the communication is known to the base station and the terminal.

[0083] 基站端模拟域向所有用户逐个(例如时分、频分或其他能够使终端区分的方式) 发送码本中的码本向量,用户k接收的ykil可以表示为: [0083] The base end to all users one by one the analog domain (e.g. time, frequency, or other terminal capable of distinguishing manner) transmitted codebook vector codebook, the received ykil user k may be expressed as:

[0084] Ykil=HkV^nk [0084] Ykil = HkV ^ nk

[0085] 这里Vi代表地i个码本向量,选择一个与h屬匹配的一个码本向量: [0085] where Vi is the i-th codebook vector, selecting a code matches a genus this vector h:

[0086] [0086]

Figure CN106330273AD00092

[0087] 此时可以近似认为 [0087] At this time can be approximated that

Figure CN106330273AD00093

从而得到近似信道hk。 To give an approximate channel hk.

[0088] 在步骤202的实施中,根据近似信道h对码本中的码本向量进行评估可以是基于SNR准则或SINR准则进行评估的。 [0088] In the embodiment of step 202, the channel h approximately codebook in codebook vector may be assessed based on the assessment criteria SINR or SNR criteria.

[0089] 具体实施中,终端根据信道h对码本中码本向量进行评估的方式可以采用以下任一方案: [0089] In particular embodiments, the terminal according to the embodiment of the channel h codebook vectors in the codebook may be evaluated using any of the following schemes:

[0090] 1、基于SNR准则(能量准则)的码本评估方式。 [0090] 1, codebook-based assessment methods SNR criterion (criterion energy) of.

[0091] 基站和所有终端共享同一个码本,码本的具体构成及波束的编号方式在通信之前由基站和终端所共知。 [0091] all the terminal and the base station share the same codebook, codebook structure and particularly the beam numbering manner known to the base station and a terminal before the communication.

[0092] 针对所有的码本,在功率相同的情况下,计算每个码本向量对应的SNRm = PI IikViI2,这里P代表噪声和功率的归一化因子。 [0092] For all codes present, in the same power calculated for each codebook vector corresponding to SNRm = PI IikViI2, where P is representative of the noise and power normalization factor.

[0093] 2、基于SINR准则的码本评估方式。 [0093] 2, assessment methods codebook based on the SINR criterion.

[0094] 基站和所有终端共享同一个码本,码本的具体构成及波束的编号方式在通信之前由基站和终端所共知。 [0094] all the terminal and the base station share the same codebook, codebook structure and particularly the beam numbering manner known to the base station and a terminal before the communication.

[0095] 针对所有的码本,在功率相同的情况下,计算每个码本向量对应的 [0095] For all codes present, in the same power calculated for each codebook vector corresponding to

Figure CN106330273AD00094

这里P代表噪声和功率的归一化因子。 Where P is representative of the noise and power normalization factor.

[0096] 实施中,还可以进一步包括:在向基站反馈码本向量时,反馈这些向量对应的SNR 值或SINR值。 [0096] In embodiments, it may further comprise: when the feedback codebook vector to the base station, the feedback SINR value or SNR value corresponding to these vectors.

[0097] 实施中,向基站反馈码本向量时反馈M个码本向量,M为数字通道数。 [0097] In embodiments, the feedback codebook vectors M feedback codebook vector to the base station, M is the number of digital channels.

[0098] 在步骤203的实施中,具体可按如下方式向基站反馈码本向量。 [0098] In step 203 of the embodiment, the specific manner can feedback codebook vector to the base station.

[0099] 终端反馈的方式可以采用以下方案中的任一种。 [0099] Terminal feedback manner in any of the following embodiment may be employed. 同样,这里假定,终端有Ntx天线,有M个数字通道,有K个用户。 Similarly, assuming the terminal has Ntx antennas with M digital channels, there are K users.

[0100] a、仅反馈M个码本向量编号的方式。 [0100] a, only the feedback codebook vector number M manner.

[0101] 每个终端,基于上一步SNR计算的方式或SINR计算的方式,选出M个最大SNR值或SINR值对应的码本向量。 [0101] each terminal, based on the manner SINR or SNR computation step of computing, selecting M largest SNR value corresponding to the SINR value or the codebook vectors.

[0102] 每个终端向基站反馈这M个码本向量编号。 [0102] Each terminal feeds back this number M codebook vectors to the base station. 相应的,基站处,如果码本中码本向量被用户反馈一次则权值+1,否则+〇。 Accordingly, the base station, if the codebook vector is the codebook feedback is the right time value of +1, + or square. 选择码本中,权值最大的M个码本向量作为模拟域预编码A。 Selected codebook, the maximum weight M codebook vectors as analog domain precoding A.

[0103] 例如,考虑K = 5用户,Ntx = 10天线,M = 7数字通道的架构。 [0103] For example, consider a user K = 5, Ntx = 10 antennas, M = 7 architecture digital channels. 则如表1所示。 As shown in the Table 1.

[0104] 表1.仅反馈码本向量编号的模拟预编码示例 Analog precoding Example [0104] Table 1. feedback codebook vector numbers only

[0105] [0105]

Figure CN106330273AD00101

[0106] 如表1所示,每个用户只反馈码本中M个拥有最大SNR(SINR)值的码本向量编号, 如果某个向量被反馈则在码本中标为1,未被反馈标志位0。 [0106] As shown in Table 1, each user only feedback codebook of M code has the largest SNR (SINR) value according to the vector number, if a vector codebook is fed back labeled at 1, the feedback flag is not bit 0. 然后将码本中每个向量对应的权值相加,选择M个拥有最大权值和(加粗斜体标注部分)的向量组成模拟域预编码A。 Then each of the codebook vectors corresponding to the weight adding select M weight and has the largest (part marked in bold italics) analog domain vector precoding composition A.

[0107] b、反馈M个码本向量编号,以及对应SINR(SNR)值的方式。 [0107] b, the feedback codebook vectors number M, and the way value SINR (SNR) corresponding to.

[0108] 每个终端,基于上一步SNR计算的方式或SINR计算的方式,选出M个最大SNR值(或SINR值)对应的码本向量。 [0108] each terminal, based on the manner SINR or SNR computation step of computing, selecting a maximum SNR value of M (or SINR value) corresponding to the codebook vectors.

[0109] 每个终端向基站反馈这M个向量编号,以及对应SNR(SINR)值。 [0109] Each terminal feeds the M vector number to the base station, and corresponding SNR (SINR) value. 基站处,利用反馈的SNR(SINR)值,计算相对应的容量,未被反馈容量为0。 Base station using feedback SNR (SINR) value, corresponding to the calculated volume, the feedback capacity is not 0. 每个码本计算每个用户能够提供的容量和,即: Each codebook is calculated for each user and can provide capacity, namely:

[0110] [0110]

Figure CN106330273AD00102

[0111] 选择码本中,容量最大的M个码本向量作为模拟域预编码A。 [0111] In the present selection code, the maximum capacity of the codebook vectors as M analog domain precoding A.

[0112] 例如,考虑K = 5用户,Ntx = 10天线,M = 7数字通道的架构。 [0112] For example, consider a user K = 5, Ntx = 10 antennas, M = 7 architecture digital channels. 基站处,对于每一个向量,针对K个用户反馈的SNR(SINR)值计算对应的容量,如下表所示: At the base station, for each vector for the K user feedback SNR (SINR) value calculation capacity corresponding to the following table:

[0113] 表2.反馈向量编号及SNR(SINR)值的模拟预编码示例 Analog precoding Example [0113] Table 2. Vector Number Feedback and SNR (SINR) value

[0114] [0114]

Figure CN106330273AD00111

[0115] [0115]

[0116] 如表2所示,每个用户只反馈M个拥有最大SNR(SINR)值的向量编号,及其SNR或SINR值。 [0116] As shown in Table 2, each user feeds back only the M has the largest SNR (SINR) value of the vector number, and SNR or SINR value. 如果某个向量被反馈则在码本中标注其对应的容量(通过SNR/SINR在上述公式中计算得到),未被反馈标记为〇。 If a vector is denoted by the corresponding feedback capacity in the codebook (/ SINR calculated by the above equation SNR), the feedback is not marked square. 然后将码本中每个向量对应的容量相加,选择M个拥有最大容量和的码本向量组成模拟域预编码A。 Then each codebook vector corresponding to the sum of the capacity, has a maximum capacity of the M selected codebook vectors and the analog domain precoding composition A.

[0117] 图3为基站侧预编码方法实施流程不意图,如图所不,可以包括: [0117] FIG. 3 is a process embodiment of the base station side precoding method is not intended, not as shown, may include:

[0118] 步骤301、接收终端反馈的码本向量,所述码本向量是终端根据近似信道h对码本中的码本向量进行评估后获得的; [0118] Step 301, the receiving terminal feeds back the codebook vector is the codebook vector according to the approximate end of the channel h codebook assess codebook vector obtained;

[0119] 步骤302、根据所述码本向量构成模拟预编码矩阵; [0119] Step 302, in accordance with the codebook vector precoding matrix configured simulation;

[0120] 步骤303、根据模拟预编码矩阵获得等效信道。 [0120] Step 303, obtaining an equivalent channel according to the analog pre-coding matrix.

[0121] 实施中,具体实施中,根据所述码本向量输出模拟预编码矩阵的方式可以采用以下方案中的任一种。 [0121] In embodiments, particular embodiments, the embodiment according to the codebook vector output analog precoding matrix may be any of the following schemes employed. 同样,这里假定,基站端有Ntx天线,有M个数字通道,有K个用户。 Similarly, assuming base station antenna Ntx end there, there are M digital channels, there are K users.

[0122] a、仅反馈M个码本向量编号的方式。 [0122] a, only the feedback codebook vector number M manner.

[0123] 实施中,可以是在接收到终端反馈的码本向量后,确定所述码本向量被终端反馈的次数; After the [0123] embodiment, the receiving terminal may be fed back codebook vector, determining the number of times the codebook vector is fed back to the terminal;

[0124] 选择次数最多的前M个码本向量构成模拟预编码矩阵,M为数字通道数。 [0124] before the most frequently selected codebook vectors composed of M analog precoding matrix, M being the number of digital channels.

[0125] 具体的,每个终端,基于上一步SNR计算的方式或SINR计算的方式,选出M个最大SNR值或SINR值对应的码本向量。 [0125] Specifically, each of the terminals, based on the SNR calculation step manner or in a manner calculated SINR, selecting M largest SNR value corresponding to the SINR value or the codebook vectors.

[0126] 每个终端向基站反馈这M个码本向量编号。 [0126] Each terminal feeds back this number M codebook vectors to the base station. 相应的,基站处,如果码本中码本向量被用户反馈一次则权值+1,否则+〇。 Accordingly, the base station, if the codebook vector is the codebook feedback is the right time value of +1, + or square. 选择码本中,权值最大的M个码本向量作为模拟域预编码A。 Selected codebook, the maximum weight M codebook vectors as analog domain precoding A.

[0127] 例如,考虑K = 5用户,Ntx = 10天线,M = 7数字通道的架构。 [0127] For example, consider a user K = 5, Ntx = 10 antennas, M = 7 architecture digital channels. 则如表3所示。 As shown in the Table 3.

[0128] 表3.仅反馈码本向量编号的模拟预编码示例 Analog precoding Example [0128] Table 3. Only feedback codebook vector number

[0129] [0129]

Figure CN106330273AD00112

Figure CN106330273AD00121

[0130] 如表3所示,每个用户只反馈码本中M个拥有最大SNR(SINR)值的码本向量编号, 如果某个向量被反馈则在码本中标为1,未被反馈标志位0。 [0130] As shown in the table, each user only feedback codebook of M has the largest SNR (SINR) value of the number of codebook vectors 3, if a vector codebook is fed back labeled at 1, the feedback flag is not bit 0. 然后将码本中每个向量对应的权值相加,选择M个拥有最大权值和(加粗斜体标注部分)的向量组成模拟域预编码A。 Then each of the codebook vectors corresponding to the weight adding select M weight and has the largest (part marked in bold italics) analog domain vector precoding composition A.

[0131] b、反馈M个码本向量编号,以及对应SINR(SNR)值的方式。 [0131] b, the feedback codebook vectors number M, and the way value SINR (SNR) corresponding to.

[0132] 实施中,在接收终端向基站反馈的码本向量及这些向量对应的SNR值或SINR值后,根据码本向量对应的SNR值或SINR值数确定码本向量对应的容量,选择容量最大的前M个码本向量为模拟预编码矩阵,M为数字通道数。 [0132] embodiment, after the SNR value or a SINR value of the receiving terminal to the base station the feedback codebook vectors and the vectors corresponding to the determined codebook vectors corresponding to the capacity in accordance with the codebook vector corresponding to the SNR values ​​or SINR values, select the capacity M before maximum codebook vectors analog precoding matrix, M being the number of digital channels.

[0133] 由于基站侧所接收的即为终端侧所反馈的,因此具体实施可以参考如上述终端侧向基站反馈码本向量及这些向量对应的SNR值或SINR值的实施。 [0133] Since the base station side is the side of the terminal by the received feedback, so the specific embodiments may be implemented with reference SINR value or SNR value of the terminal side base station as the feedback codebook vectors and the vectors corresponding to these.

[0134] 具体的,每个终端,基于上一步SNR计算的方式或SINR计算的方式,选出M个最大SNR值(或SINR值)对应的码本向量。 [0134] Specifically, each of the terminals, based on the SNR calculation step manner or in a manner calculated SINR, selecting M largest SNR value (or SINR value) corresponding to the codebook vectors.

[0135] 每个终端向基站反馈这M个向量编号,以及对应SNR(SINR)值。 [0135] Each terminal feeds the M vector number to the base station, and corresponding SNR (SINR) value. 基站处,利用反馈的SNR(SINR)值,计算相对应的容量,未被反馈容量为0。 Base station using feedback SNR (SINR) value, corresponding to the calculated volume, the feedback capacity is not 0. 每个码本计算每个用户能够提供的容量和,即: Each codebook is calculated for each user and can provide capacity, namely:

[0136] [0136]

Figure CN106330273AD00122

[0137] 选择码本中,容量最大的M个码本向量作为模拟域预编码A。 [0137] In the present selection code, the maximum capacity of the codebook vectors as M analog domain precoding A.

[0138] 例如,考虑K = 5用户,Ntx = 10天线,M = 7数字通道的架构。 [0138] For example, consider a user K = 5, Ntx = 10 antennas, M = 7 architecture digital channels. 基站处,对于每一个向量,针对K个用户反馈的SNR(SINR)值计算对应的容量,如下表所示: At the base station, for each vector for the K user feedback SNR (SINR) value calculation capacity corresponding to the following table:

[0139] 表4.反馈向量编号及SNR(SINR)值的模拟预编码示例 Analog precoding Example [0139] Table 4. Vector Number Feedback and SNR (SINR) value

[0140] [0140]

Figure CN106330273AD00123

Figure CN106330273AD00131

[0141] 如表4所示,每个用户只反馈M个拥有最大SNR(SINR)值的向量编号,及其SNR或SINR值。 [0141] As shown in Table 4, each user feeds back only the M has the largest SNR (SINR) value of the vector number, and SNR or SINR value. 如果某个向量被反馈则在码本中标注其对应的容量(通过SNR/SINR在上述公式中计算得到),未被反馈标记为〇。 If a vector is denoted by the corresponding feedback capacity in the codebook (/ SINR calculated by the above equation SNR), the feedback is not marked square. 然后将码本中每个向量对应的容量相加,选择M个拥有最大容量和的码本向量组成模拟域预编码A。 Then each codebook vector corresponding to the sum of the capacity, has a maximum capacity of the M selected codebook vectors and the analog domain precoding composition A.

[0142] 在步骤303的实施中,根据模拟预编码矩阵获得等效信道,可以包括: [0142] In the embodiment of step 303, an equivalent channel according to the simulation to obtain the precoding matrix may comprise:

[0143] 获取每个终端的近似信道h,并组成近似信道h ; [0143] Each terminal acquires approximate channel h, and the approximate composition H channel;

[0144] 根据模拟预编码矩阵与近似信道h获得等效信道。 [0144] According to the simulation to obtain the equivalent channel matrix and the precoding channel approximation h.

[0145] 具体实施中,在数字域预编码处理过程中,考虑到已经确定了模拟域预编码A,取Heq= HA,为数字域看到的等效信道模型。 [0145] In particular embodiments, in the digital domain pre-encoding process, it has been determined taking into account the pre-coding the analog domain A, taken Heq = HA, an equivalent channel model as seen in the digital domain. 此时数字域的处理模型可以表示为:Y = HeqDs+N, 这里D表示数字域预编码矩阵。 At this time, the digital processing domain model can be expressed as: Y = HeqDs + N, where D represents the digital domain precoding matrix.

[0146] 由于模拟域A的处理,高炜度的H转变为低炜度的等效信道Heq。 [0146] Since the processing, high degree Wei A H is converted into the analog domain equivalent channel Wei Heq low degree. 所以,数字域的预编码方法这里可以直接利用传统中相对复杂的预编码方法。 Therefore, the pre-coding method for a digital domain herein can be used directly in relatively complex conventional precoding method.

[0147] 则数字域对于等价信道的获取方式,实施中可以采用以下两种方式任意一种: [0147] Obtaining the digital domain to an equivalent channel, embodiments may be any one of the following two ways:

[0148] a、传统方式获取准确信道。 [0148] a, in a conventional manner to obtain an accurate channel.

[0149] 可以直接参照以前MIMO的方式,如,在TDD系统中,基于信道互易性,利用上行参考信号得到下行信道H eq。 [0149] MIMO direct reference to the previous manner, e.g., in a TDD system, based on channel reciprocity, the uplink reference signal using the obtained downlink channel H eq. 在FDD系统中,基站端发送导频(或者码本)的形式,用户检测并反馈给基站。 In an FDD system, the base station sends a pilot (or codebook) form, and the user is detected to the base station.

[0150] b、利用近似信道hk。 [0150] b, using an approximate channel hk.

[0151] 如前述终端侧实施中给出的两种基于Los径角度或基于下行码本测量确定的近似信道匕获取方式。 Two kinds of [0151] the terminal side of the preceding embodiment is given based on the angle or radial dagger Los Obtaining downlink channel based on the approximate codebook determined from measurements. 基站获取每个用户的近似信道hk,可组成近似信道H。 Each base station acquires the approximate user channel hk, the composition may be approximated channel H. 此时基站处也已知模拟A,进而便可以获得Heq= HA。 At this time, the base station is also known that analog A, and thus it is possible to obtain Heq = HA.

[0152] 对于数字域预编码的方式,此时数字域的预编码,也可以直接利用传统的方式,由于运算的维度低,所以可以利用一些复杂度稍高的算法,如ZF算法、MMSE算法等。 [0152] For the pre-coded digital domain mode, then the digital domain precoding, may be directly used in a conventional manner, since the low-dimensional calculation, it is possible to use some of the higher complexity of the algorithm, such as ZF algorithm, the MMSE algorithm Wait.

[0153] 考虑到MU-MIMO中用户间干扰的容量约束,以及模拟域预编码在消除用户间干扰的不足,在数字域推荐采用ZF预编码算法,BP : [0153] Taking into account the capacity constraints between MU-MIMO user interference, and the analog domain precoding insufficient to eliminate inter-user interference in the digital domain recommended ZF precoding algorithm, BP:

[0154] [0154]

Figure CN106330273AD00132

[0155] 下面对终端与基站的结合实施方式进行说明。 [0155] Next, the terminal and the base binding embodiment will be described.

[0156] 图4为有限反馈模数架构预编码算法实施流程示意图,整个过程中,前四个框图(步骤401-404)代表模拟域预编码,最后一个框图(步骤405)代表数字域预编码。 [0156] FIG. 4 is a schematic flow diagram of embodiments modulus architecture limited feedback precoding method, the whole process, a block diagram of the first four (steps 401-404) represent the analog domain precoding, a block last (step 405) representative of the digital domain precoder . 说明中假设用户数为K,数字通道数为M,天线阵子数为Ntx。 DESCRIPTION assumed number of users is K, the number of digital channels is M, the number of antenna elements Ntx. 如图所示,本发明实施例提供的技术方案主要为: As shown, the technical solution provided by the embodiment of the present invention is mainly as follows:

[0157] 终端侧: [0157] the terminal side:

[0158] 步骤401、终端输出近似信道h ; [0158] Step 401, the channel H approximate the output terminal;

[0159] 其中,获取近似信道h可以有两种方式,基于Los径角度获得近似信道h,或基于下行码本测量的方式获得近似信道h,上述实施例中已经进行说明,此处不再赘述。 [0159] wherein obtaining approximate channel h There are two ways to obtain an approximate channel h based Los path angle, or obtain an approximate channel h based on the downlink codebook measurement embodiment, the above-described embodiments have been described, is not repeated here .

[0160] 步骤402、终端对码本中的码本向量进行评估,输出码本向量,以及SNR(Signal-t〇-Noise Ratio,信噪比)或者SINR(Signal to Interference plus Noise Ratio,信号与干扰和噪声比)值; [0160] Step 402, the terminal code present in the codebook vectors to assess codebook vector output, and SNR (Signal-t〇-Noise Ratio, SNR) or SINR (Signal to Interference plus Noise Ratio, signal interference and noise ratio) value;

[0161] 其中,终端评估的方式可以有两种,基于SNR准则或SINR准则进行评估,上述实施例中已经进行说明,此处不再赘述。 [0161] wherein, the terminal can have two ways evaluation, an evaluation criteria based on the SNR or SINR criterion, the above embodiment has been described, it is not repeated here.

[0162] 步骤403、终端从码本中选择M个码本向量码本向基站反馈; [0162] Step 403, the terminal selects the M code vectors from the codebooks in the codebook of the present feedback to the base station;

[0163] 其中,选择方式可以有两种:选择M个最大SNR值对应的码本或者选择M个最大SINR值对应的码本;反馈方式可以有两种:反馈M个码本向量编号或者反馈M个码本向量编号及其SNR(SINR)值。 [0163] wherein, there are two mode selection: Select the M largest SNR value corresponding to the selected codebook or a codebook of M corresponding to the maximum SINR values; embodiment there are two feedback: feedback codebook vectors M number or feedback No. M codebook vectors and SNR (SINR) value. 上述实施例中已经进行说明,此处不再赘述。 The above-described embodiments have been described, it will not be repeated here.

[0164] 在终端侧,基站和终端共享相同的码本,利用信道估计获取近似全炜度信道状态信息,各个终端对码本中所有码本向量进行评估,然后反馈给基站码本评估信息。 [0164] In the terminal side, the base station and the terminal share the same codebook, channel estimate acquired approximately full Wei of channel state information, each terminal code present in all the codebook vectors evaluated, and then to the base station codebook evaluation information.

[0165] 基站侧: [0165] the base station side:

[0166] 步骤404、基站确定模拟域预编码,输出模拟预编码矩阵A ; [0166] Step 404, the base station determines the precoding analog domain, the analog output of the precoding matrix A;

[0167] 其中,确定模拟域预编码可以有两种方式:算权值和取最大的M个码本向量或者算容量和取最大的M个码本向量。 [0167] wherein the analog domain precoding may be determined in two ways: taking the maximum value and the calculated weight of M codebook vectors or operator and taking the maximum capacity of M codebook vectors. 此处的确定与前述终端侧步骤403的码本向量选择相关, 上述实施例中已经进行说明,此处不再赘述。 The step of determining the side where the terminal 403 associated codebook vector selection, the above-described embodiments have been described, will not be repeated here.

[0168] 步骤405、数字域预编码; [0168] Step 405, the digital domain precoding;

[0169] 其中:获得等效信道的方式可以有两种:按传统方式获取准确信道Heq,或者利用步骤401中给出的两种近似信道h,再根据A得到:Heq = HA。 [0169] wherein: obtaining an equivalent manner can have two channels: acquiring accurate channel by a conventional manner Heq, or in step 401 using the given channel two approximation h, then obtained according to A: Heq = HA. 上述实施例中已经进行说明, 此处不再赘述。 The above-described embodiments have been described, it will not be repeated here.

[0170] 最后便可以利用等效信道Heq做数字域波束赋形,如迫零等。 [0170] Finally, it can be done using the equivalent channel Heq digital domain beamforming, such as zero forcing the like. 这里的数字域预编码方法可直接利用现有方法,这里不再赘述。 Here the digital domain precoding method can be used directly by a conventional method, it is not repeated here.

[0171] 在基站侧,在终端反馈给基站码本评估信息后,基站选定码本向量作为最终模拟域预编码A,模拟域预编码已固定,基于经过模拟预编码的等效信道,数字域做数字域预编码。 [0171] In the base station side, the terminal feeds back the information to assess codebook base station, the selected codebook vector as the final analog domain precoding A, have a fixed pre-coding the analog domain, based on the elapsed simulation precoded equivalent channel, digital domain do the digital domain pre-coding. 等效信道可以利用基带参考信号对真实的等效信道进行估计得到,或者将步骤401给出的近似信道h信息与模拟预编码联合处理得到。 Equivalent channels may be true equivalent channel estimation obtained using the baseband reference signal, or an approximation step 401 will be given of the channel information h and the joint processing obtained analog precoding.

[0172] 基于同一发明构思,本发明实施例中还提供了一种预编码装置,由于这些装置解决问题的原理与预编码方法相似,因此这些装置的实施可以参见方法的实施,重复之处不再赘述。 [0172] Based on the same inventive concept, an embodiment of the present invention further provides a pre-coding apparatus, since these devices with similar principles to solve the problem of pre-coding method, and therefore the implementation of these devices can be found in a method, no duplications then repeat.

[0173] 图5为终端侧预编码装置结构示意图,如图所示,可以包括: [0173] FIG. 5 is a schematic view of a pre-coding apparatus configuration of the terminal side, as shown, may include:

[0174] 信道模块501,用于在终端上输出近似信道h ; [0174] channel module 501 is configured to approximate the output terminal channel H;

[0175] 评估模块502,用于根据近似信道h对码本中的码本向量进行评估,所述码本是基站与终端所共知的码本; [0175] The evaluation module 502, according to the approximate channel h codebook in codebook vector evaluating the codebook is known to the base station and terminal codebook;

[0176] 反馈模块503,用于根据评估结果向基站反馈码本向量。 [0176] The feedback module 503, a feedback codebook vector to the base station based on the evaluation.

[0177] 实施中,信道模块还可以进一步用于基于Los径角度确定近似信道h,或,基于下行码本测量的方式确定近似信道h。 [0177] embodiment, the channel modules may further be used to determine the approximate channel h, or to determine the approximate code based on the downlink channel h measured according to the present embodiment based Los path angle.

[0178] 实施中,评估模块还可以进一步用于基于SNR准则或SINR准则对码本中的码本向量进行评估。 [0178] embodiment, the evaluation module may further criterion based on SNR or SINR criterion codebook codebook vectors evaluated.

[0179] 实施中,反馈模块还可以进一步用于向基站反馈拥有最大SNR值或者SINR值的码本向量。 [0179] In embodiments, the feedback module may be further used for feedback with the largest SINR value or SNR value of the codebook vectors to the base station.

[0180] 实施中,反馈模块还可以进一步用于在向基站反馈码本向量时,反馈所述码本向量对应的SNR值或SINR值。 [0180] In embodiments, the feedback module may be further configured to, when the feedback codebook vector to the base station, the feedback SINR value or SNR value of the corresponding codebook vector.

[0181] 实施中,反馈模块还可以进一步用于在向基站反馈码本向量时反馈M个码本向量,M为数字通道数。 [0181] In embodiments, the feedback module may be further used for the feedback codebook vectors M in the feedback codebook vector to the base station, M is the number of digital channels.

[0182] 图6为基站侧预编码装置结构示意图,如图所示,可以包括: [0182] FIG. 6 is a schematic view of a pre-coding apparatus of a base station-side configuration, as shown, may include:

[0183] 接收模块601,用于接收终端反馈的码本向量,所述码本向量是终端根据近似信道h对码本中的码本向量进行评估后获得的; [0183] a receiving module 601, a terminal for receiving a feedback codebook vector is the codebook vector according to the approximate end of the channel h codebook assess codebook vector obtained;

[0184] 模拟预编码矩阵模块602,用于根据所述码本向量构成模拟预编码矩阵; [0184] Analog precoding matrix module 602, a precoding matrix for forming simulation according to the codebook vector;

[0185] 等效信道模块603,用于根据模拟预编码矩阵获得等效信道。 [0185] equivalent channel module 603 for obtaining an equivalent channel according to the analog pre-coding matrix.

[0186] 实施中,模拟预编码矩阵模块进一步用于在接收到终端反馈的码本向量后,确定码本向量被终端反馈的次数,选择次数最多的前M个码本向量构成模拟预编码矩阵,M为数字通道数。 [0186] In embodiments, the analog is further precoding matrix module for the terminal after receiving the feedback codebook vector, determining the number of codebook vectors fed back by the terminal, the highest number of selected first M codebook vectors constituting the precoding matrix analog , M being the number of digital channels.

[0187] 实施中,接收模块还可以进一步用于在接收终端向基站反馈码本向量时,接收所述码本向量对应的SNR值或SINR值。 [0187] In embodiments, the receiving module may be further SINR value or values ​​for SNR at the receiving terminal feeds back the codebook vector to the base station, receives the corresponding codebook vector.

[0188] 实施中,模拟预编码矩阵模块进一步用于在接收终端向基站反馈的码本向量及所述码本向量对应的SNR值或SINR值后,根据码本向量对应的SNR值或SINR值数确定码本向量的容量,选择容量最大的前M个码本向量为模拟预编码矩阵,M为数字通道数。 [0188] In embodiments, the analog module the precoding matrix is ​​further configured to, after receiving SNR value or a SINR value of the feedback terminal to the base station and the codebook vectors corresponding to the codebook vectors, or the SNR value corresponding to the SINR value according to the codebook vector the number of codebook vectors to determine the capacity, the maximum capacity of the selected first M codebook vectors analog precoding matrix, M is the number of digital channels.

[0189] 实施中,等效信道模块还可以进一步用于在根据模拟预编码矩阵获得等效信道时,获取每个终端的近似信道h,并组成近似信道h ;根据模拟预编码矩阵与近似信道h获得等效信道。 [0189] embodiment, the equivalent channel module may further be used in obtaining the equivalent channel from the analog pre-coding matrix, obtaining an approximate channel h each terminal, and the approximate composition channel h; The analog pre-coding matrix and approximate channel h to obtain equivalent channel.

[0190] 为了描述的方便,以上所述装置的各部分以功能分为各种模块或单元分别描述。 [0190] For convenience of description, the parts of the above device is divided into various functional modules or units are described separately. 当然,在实施本发明时可以把各模块或单元的功能在同一个或多个软件或硬件中实现。 Of course, the functions of the respective modules or units implemented in one or more software or hardware in the practice of the present invention.

[0191] 在实施本发明实施例提供的技术方案时,可以按如下方式实施。 [0191] In the practice of the technical solution provided in embodiments of the present invention may be embodied as follows.

[0192] 图7为终端结构示意图,如图所示,用户设备包括: [0192] FIG. 7 is a schematic view of the terminal structure, as shown, the user equipment comprising:

[0193] 处理器700,用于读取存储器720中的程序,执行下列过程: [0193] processor 700, a memory 720 for reading a program, performing the following procedure:

[0194] 在终端上输出近似信道h; [0194] On the channel H approximate the output terminal;

[0195] 根据近似信道h对码本中的码本向量进行评估,所述码本是基站与终端所共知的码本; [0195] The approximation of the channel h codebook assess codebook vector, the codebook is known to the base station and terminal codebook;

[0196] 收发机710,用于在处理器700的控制下发送数据,执行下列过程: [0196] The transceiver 710 for transmitting data under control of the processor 700, perform the following procedure:

[0197] 根据评估结果向基站反馈码本向量。 [0197] feedback codebook vector to the base station based on the evaluation.

[0198] 实施中,所述近似信道h是基于Los径角度确定的近似信道h,或,基于下行码本测量的方式确定的近似信道h。 [0198] In embodiments, the approximation is based on the channel h Los diameter approximate angle determination channel h, or determined based on a downlink measurement according to the present embodiment is approximately the code channel h.

[0199] 实施中,对码本中的码本向量进行评估是基于SNR准则或SINR准则进行评估的。 [0199] implementation, the codebook vector codebook is assessed based on the assessment criteria SNR or SINR criterion.

[0200] 实施中,终端向基站反馈拥有最大SNR值或者SINR值的码本向量。 [0200] In embodiments, the terminal has the largest SNR value or feedback SINR value of the codebook vectors to the base station.

[0201] 实施中,进一步包括:在向基站反馈码本向量时,反馈所述码本向量对应的SNR值或SINR值。 [0201] In embodiment, further comprising: when the feedback codebook vector to the base station, the feedback SINR value or SNR value of the corresponding codebook vector.

[0202] 实施中,向基站反馈码本向量时反馈M个码本向量,M为数字通道数。 [0202] In embodiments, the feedback codebook vectors M feedback codebook vector to the base station, M is the number of digital channels.

[0203] 其中,在图7中,总线架构可以包括任意数量的互联的总线和桥,具体由处理器700代表的一个或多个处理器和存储器720代表的存储器的各种电路链接在一起。 [0203] where, in FIG. 7, a bus architecture may include any number of interconnecting buses and bridges, particularly various circuits linked by the memory 700 on behalf of one or more processors and processor memory 720 represented together. 总线架构还可以将诸如外围设备、稳压器和功率管理电路等之类的各种其他电路链接在一起,这些都是本领域所公知的,因此,本文不再对其进行进一步描述。 Bus architecture may also link various other circuits such as peripherals, voltage regulators, power management circuits, and the like together, these are well known in the art, therefore, it will not be further described herein. 总线接口提供接口。 Bus interface provides interface. 收发机710可以是多个元件,即包括发送机和接收机,提供用于在传输介质上与各种其他装置通信的单元。 The transceiver 710 may be a plurality of elements, i.e. comprising a transmitter and a receiver, and provide the various units in a transmission medium for communicating with other devices. 针对不同的用户设备,用户接口730还可以是能够外接内接需要设备的接口,连接的设备包括但不限于小键盘、显示器、扬声器、麦克风、操纵杆等。 For different user devices, user interface 730 may also need to be able to access the external device interface to connect devices include but are not limited to a keypad, display, speaker, microphone, joystick and the like.

[0204] 处理器700负责管理总线架构和通常的处理,存储器720可以存储处理器700在执行操作时所使用的数据。 [0204] processor 700 is responsible for managing the bus architecture and normal processing, a data memory 720 may store processor 700 while performing an operation used.

[0205] 图8为基站结构不意图,如图所不,基站中包括: [0205] FIG. 8 is a base station structure is not intended, not as shown, the base station comprising:

[0206] 处理器800,用于读取存储器820中的程序,执行下列过程: [0206] processor 800, to read the program memory 820, perform the following procedure:

[0207] 根据所述码本向量构成模拟预编码矩阵; [0207] The precoding matrix constituting the codebook vector analog;

[0208] 根据模拟预编码矩阵获得等效信道; [0208] According to the simulation to obtain equivalent channel precoding matrix;

[0209] 收发机810,用于在处理器800的控制下发送数据,执行下列过程: [0209] The transceiver 810 for transmitting data under control of the processor 800, perform the following procedure:

[0210] 接收终端反馈的码本向量,所述码本向量是终端根据近似信道h对码本中的码本向量进行评估后获得的。 [0210] the receiving terminal feeds back the codebook vector is the codebook vector according to the approximate end of the channel h codebook assess codebook vector obtained.

[0211] 实施中,所述根据所述码本向量输出模拟预编码矩阵,包括: [0211] In embodiments, the codebook vector according to the output of the analog pre-coding matrix, comprising:

[0212] 在接收到终端反馈的码本向量后,确定所述码本向量被终端反馈的次数; [0212] After receiving terminal feeds back codebook vector, determining the number of times the codebook vector is fed back to the terminal;

[0213] 选择次数最多的前M个码本向量构成模拟预编码矩阵,M为数字通道数。 [0213] before the most frequently selected codebook vectors composed of M analog precoding matrix, M being the number of digital channels.

[0214] 实施中,在接收终端向基站反馈码本向量时,接收所述码本向量对应的SNR值或SmR 值。 When the [0214] embodiment, the feedback codebook vectors to the base station at the receiving terminal, the received SNR value or SmR value corresponding to the codebook vector.

[0215] 实施中,在接收终端向基站反馈的码本向量及这些向量对应的SNR值或SINR值后,根据码本向量对应的SNR值或SINR值数确定码本向量对应的容量,选择容量最大的前M个码本向量为模拟预编码矩阵,M为数字通道数。 [0215] embodiment, after the SNR value or a SINR value of the receiving terminal to the base station the feedback codebook vectors and the vectors corresponding to the determined codebook vectors corresponding to the capacity in accordance with the codebook vector corresponding to the SNR values ​​or SINR values, select the capacity M before maximum codebook vectors analog precoding matrix, M being the number of digital channels.

[0216] 实施中,根据模拟预编码矩阵获得等效信道,包括: [0216] In embodiments, an equivalent channel according to the simulation to obtain the precoding matrix, comprising:

[0217] 获取每个终端的近似信道h,并组成近似信道h ; [0217] Each terminal acquires approximate channel h, and the approximate composition H channel;

[0218] 根据模拟预编码矩阵与近似信道h获得等效信道。 [0218] According to the simulation to obtain the equivalent channel matrix and the precoding channel approximation h.

[0219] 其中,在图8中,总线架构可以包括任意数量的互联的总线和桥,具体由处理器800代表的一个或多个处理器和存储器820代表的存储器的各种电路链接在一起。 [0219] where, in FIG. 8, a bus architecture may include any number of interconnecting buses and bridges, particularly the one or more links to various circuits of a memory processor and a memory 820 represented by a representative processor 800 together. 总线架构还可以将诸如外围设备、稳压器和功率管理电路等之类的各种其他电路链接在一起,这些都是本领域所公知的,因此,本文不再对其进行进一步描述。 Bus architecture may also link various other circuits such as peripherals, voltage regulators, power management circuits, and the like together, these are well known in the art, therefore, it will not be further described herein. 总线接口提供接口。 Bus interface provides interface. 收发机810可以是多个元件,即包括发送机和收发机,提供用于在传输介质上与各种其他装置通信的单元。 The transceiver 810 may be a plurality of elements, i.e. comprising a transmitter and a transceiver and various units provided in a transmission medium for communicating with other devices. 处理器800负责管理总线架构和通常的处理,存储器820可以存储处理器800在执行操作时所使用的数据。 The processor 800 is responsible for managing the bus architecture and normal processing, the processor 800 memory 820 may store data used when executing the operation.

[0220] 综上所述,在本发明实施例里提供了模拟域信道估计、终端码本评估、模拟预编码,与数字域基于等效信道预编码的实施方案。 [0220] As described above, in the present invention, a terminal code present evaluation, simulation precoding equivalent channel and the digital domain based precoding in Example embodiments provide an analog domain channel estimate. 本方案能够提高模拟和数字预编码的精度, 减少信道反馈开销。 The present embodiment can improve the accuracy of analog and digital precoding, channel feedback overhead reduction. 同时,终端还可以动态调整反馈的模拟码本向量的数目,这样可以适应不同基站端的数字通道数目,充分利用不同所有的数字通道资源。 Meanwhile, the terminal can dynamically adjust the number of analog feedback codebook vectors, which can accommodate the number of digital channels of different base side, full use of all the different channels of the digital resources.

[0221 ] 本领域内的技术人员应明白,本发明的实施例可提供为方法、系统、或计算机程序产品。 [0221] skilled in the art should understand that the embodiments of the present invention may provide a method, system, or computer program product. 因此,本发明可采用完全硬件实施例、完全软件实施例、或结合软件和硬件方面的实施例的形式。 Thus, embodiments of the present invention may be employed entirely hardware embodiment, an entirely software embodiment, or an embodiment in conjunction with the form of software and hardware aspects. 而且,本发明可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质(包括但不限于磁盘存储器和光学存储器等)上实施的计算机程序产品的形式。 Further, in the present invention may comprise one or more of which computer usable storage medium having computer-usable program code (including but not limited to disk storage, and optical storage) in the form of a computer program product implemented on.

[0222] 本发明是参照根据本发明实施例的方法、设备(系统)、和计算机程序产品的流程图和/或方框图来描述的。 [0222] The present invention has been described in accordance with the method of Example of the present invention, apparatus (systems) and computer program products flowchart and / or block diagrams described. 应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。 It should be understood and implemented by computer program instructions and block, and the flowchart / or block diagrams each process and / or flowchart illustrations and / or block diagrams of processes and / or blocks. 可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器,使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。 These computer program instructions may be provided to a processor a general purpose computer, special purpose computer, embedded processor or other programmable data processing apparatus to produce a machine, such that the instructions executed by the processor of the computer or other programmable data processing apparatus generating in a device for implementing the flow chart or more flows and / or block diagram block or blocks in a specified functions.

[0223] 这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中,使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品,该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。 [0223] These computer program instructions may also be stored in a computer can direct a computer or other programmable data processing apparatus to function in a particular manner readable memory produce an article of manufacture such that the storage instruction means comprises a memory in the computer-readable instructions the instruction means implemented in a flowchart or more flows and / or block diagram block or blocks in a specified function.

[0224] 这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上,使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理,从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。 [0224] These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps on the computer or other programmable apparatus to produce a computer implemented so that the computer or other programmable apparatus execute instructions to provide processes for implementing a process or flows and / or block diagram block or blocks a function specified step.

[0225] 显然,本领域的技术人员可以对本发明进行各种改动和变型而不脱离本发明的精神和范围。 [0225] Obviously, those skilled in the art can make various modifications and variations to the invention without departing from the spirit and scope of the invention. 这样,倘若本发明的这些修改和变型属于本发明权利要求及其等同技术的范围之内,则本发明也意图包含这些改动和变型在内。 Thus, if these modifications and variations of the present invention fall within the claims of the invention and the scope of equivalents thereof, the present invention intends to include these modifications and variations.

Claims (22)

1. 一种预编码方法,其特征在于,包括: 在终端上输出近似信道h; 根据近似信道h对码本中的码本向量进行评估,所述码本是基站与终端所共知的码本; 根据评估结果向基站反馈码本向量。 A pre-coding method, characterized by comprising: an output terminal approximation channel h; evaluated according to the approximate code channel h in this codebook vector, the codebook is known to the base station and the terminal code present; feedback codebook vector to the base station based on the evaluation.
2. 根据权利要求1所述的方法,其特征在于,所述近似信道h是基于Los径角度确定的近似信道h,或,基于下行码本测量的方式确定的近似信道h。 2. The method according to claim 1, wherein the approximation is based on the channel h Los diameter approximate angle determination channel h, or determined based on a downlink measurement according to the present embodiment is approximately the code channel h.
3. 根据权利要求1所述的方法,其特征在于,对码本中的码本向量进行评估是基于SNR 准则或SINR准则进行评估的。 3. The method according to claim 1, wherein the codebook vector in the codebook is assessed based on the assessment criteria SNR or SINR criterion.
4. 根据权利要求3所述的方法,其特征在于,终端向基站反馈拥有最大SNR值或者SINR值的码本向量。 4. The method according to claim 3, wherein the feedback terminal to the base station code has the largest SINR value or SNR value of the present vector.
5. 根据权利要求3或4所述的方法,其特征在于,进一步包括:在向基站反馈码本向量时,反馈所述码本向量对应的SNR值或SINR值。 The method according to claim 3 or claim 4, characterized in that, further comprising: when the feedback codebook vector to the base station, the feedback SINR value or SNR value of the corresponding codebook vector.
6. 根据权利要求1至5任一所述的方法,其特征在于,向基站反馈码本向量时反馈Μ个码本向量,Μ为数字通道数。 The method according to any one of claim 1 to claim 5, characterized in that the feedback codebook vectors [mu] feedback codebook vector to the base station, [mu] is the number of digital channels.
7. -种预编码方法,其特征在于,包括: 接收终端反馈的码本向量,所述码本向量是终端根据近似信道h对码本中的码本向量进行评估后获得的; 根据所述码本向量构成模拟预编码矩阵; 根据模拟预编码矩阵获得等效信道。 7. - kind of pre-coding method, characterized by comprising: receiving terminal feeds back the codebook vector is the codebook vector obtained from the terminal according to the approximation of the channel h codebook codebook vector for evaluation; according to the analog codebook vectors constituting the precoding matrix; obtained according to the equivalent channel analog precoding matrix.
8. 根据权利要求7所述的方法,其特征在于,所述根据所述码本向量输出模拟预编码矩阵,包括: 在接收到终端反馈的码本向量后,确定所述码本向量被终端反馈的次数; 选择次数最多的前Μ个码本向量构成模拟预编码矩阵,Μ为数字通道数。 8. The method according to claim 7, wherein said vector codebook according to the output of the analog pre-coding matrix, comprising: the terminal after receiving the feedback codebook vector, the codebook vector is determined by the terminal the number of feedback; [mu] selecting the number of most codebook vectors constituting the precoding matrix analog, [mu] is the number of digital channels.
9. 根据权利要求7所述的方法,其特征在于,进一步包括:在接收终端向基站反馈码本向量时,接收所述码本向量对应的SNR值或SINR值。 9. The method according to claim 7, characterized in that, further comprising: a feedback codebook vector to the base station at the receiving terminal, or SNR value received SINR value corresponding to the codebook vector.
10. 根据权利要求9所述的方法,其特征在于,在接收终端向基站反馈的码本向量及所述码本向量对应的SNR值或SINR值后,根据码本向量对应的SNR值或SINR值数确定码本向量的容量,选择容量最大的前Μ个码本向量为模拟预编码矩阵,Μ为数字通道数。 10. The method according to claim 9, wherein, after the receiving terminal to the base station in the feedback codebook vector and the vector corresponding to the present value of the SNR or SINR value of the code, according to a codebook vector corresponding to the SINR or SNR value capacity values ​​determined codebook vectors, selecting the maximum capacity of the codebook vectors before [mu] analog precoding matrix, [mu] is the number of digital channels.
11. 根据权利要求7至10任一所述的方法,其特征在于,根据模拟预编码矩阵获得等效信道,包括: 获取每个终端的近似信道h,并组成近似信道h ; 根据模拟预编码矩阵与近似信道h获得等效信道。 11. The method of claim 7-1 according to any of claim 10, wherein the obtaining an equivalent channel according to the analog pre-coding matrix, comprising: obtaining channel h approximately for each terminal, and channel h approximate composition; pre-encoded according to an analog matrix channel h to obtain approximately equivalent channel.
12. -种预编码装置,其特征在于,包括: 信道模块,用于在终端上输出近似信道h ; 评估模块,用于根据近似信道h对码本中的码本向量进行评估,所述码本是基站与终端所共知的码本; 反馈模块,用于根据评估结果向基站反馈码本向量。 12. - kind of pre-coding apparatus comprising: a channel module configured to approximate the output terminal channel h; evaluation module configured to evaluate the approximate channel code h on this codebook vectors, the code this is known to the base station and terminal codebook; feedback module, for feeding back the codebook vector to the base station based on the evaluation.
13. 根据权利要求12所述的装置,其特征在于,信道模块进一步用于基于Los径角度确定近似信道h,或,基于下行码本测量的方式确定近似信道h。 13. The apparatus as claimed in claim 12, characterized in that the channel module is further configured to determine an approximate channel h, or to determine the approximate code based on the downlink channel h measured according to the present embodiment based Los path angle.
14. 根据权利要求12所述的装置,其特征在于,评估模块进一步用于基于SNR准则或SINR准则对码本中的码本向量进行评估。 14. The apparatus as claimed in claim 12, wherein the evaluation module is further criterion based on SNR or SINR criterion codebook codebook vectors evaluated.
15. 根据权利要求14所述的装置,其特征在于,反馈模块进一步用于向基站反馈拥有最大SNR值或者SINR值的码本向量。 15. The apparatus according to claim 14, wherein the feedback module is further configured to code the base station has a maximum SNR feedback SINR value of the present value or a vector.
16. 根据权利要求14或15所述的装置,其特征在于,反馈模块进一步用于在向基站反馈码本向量时,反馈所述码本向量对应的SNR值或SINR值。 16. The apparatus of claim 14 or claim 15, wherein the feedback module is further configured to, when the feedback codebook vector to the base station, the feedback SINR value or SNR value of the corresponding codebook vector.
17. 根据权利要求12至15任一所述的装置,其特征在于,反馈模块进一步用于在向基站反馈码本向量时反馈Μ个码本向量,Μ为数字通道数。 17. The apparatus according to any one of claims 12 to 15, wherein the feedback module is further used for feedback [mu] codebook vectors when the feedback codebook vector to the base station, [mu] is the number of digital channels.
18. -种预编码装置,其特征在于,包括: 接收模块,用于接收终端反馈的码本向量,所述码本向量是终端根据近似信道h对码本中的码本向量进行评估后获得的; 模拟预编码矩阵模块,用于根据所述码本向量构成模拟预编码矩阵; 等效信道模块,用于根据模拟预编码矩阵获得等效信道。 18. - kind of pre-coding apparatus comprising: receiving means for receiving terminal feeds back the codebook vector of the codebook vector is obtained according to the terminal after the approximation of the channel h codebook assess codebook vector ; the simulation module precoding matrix, according to the codebook vector precoding matrix configured simulation; equivalent channel means for obtaining an equivalent channel according to the analog pre-coding matrix.
19. 根据权利要求18所述的装置,其特征在于,模拟预编码矩阵模块进一步用于在接收到终端反馈的码本向量后,确定码本向量被终端反馈的次数,选择次数最多的前Μ个码本向量构成模拟预编码矩阵,Μ为数字通道数。 19. The apparatus according to claim 18, characterized in that the simulation module is further precoding matrix for the terminal after receiving the feedback codebook vector, determining the number of codebook vectors being fed back terminal, the highest number of selected pre Μ analog codebook vectors constituting the precoding matrix, [mu] is the number of digital channels.
20. 根据权利要求18所述的装置,其特征在于,接收模块进一步用于在接收终端向基站反馈码本向量时,接收所述码本向量对应的SNR值或SINR值。 20. The apparatus according to claim 18, wherein the receiving module is further SINR value or values ​​for SNR at the receiving terminal feeds back the codebook vector to the base station, receives the corresponding codebook vector.
21. 根据权利要求20所述的装置,其特征在于,模拟预编码矩阵模块进一步用于在接收终端向基站反馈的码本向量及所述码本向量对应的SNR值或SINR值后,根据码本向量对应的SNR值或SINR值数确定码本向量的容量,选择容量最大的前Μ个码本向量为模拟预编码矩阵,Μ为数字通道数。 21. After the apparatus according to claim 20, wherein the precoding matrix module is further simulated SNR value for the feedback SINR value or the receiving terminal to the base station and the codebook vectors corresponding to the codebook vector, according to the code SINR or SNR value corresponding to the number of values ​​to determine the capacity of this vector codebook vectors, selecting the maximum capacity of the codebook vectors before [mu] analog precoding matrix, [mu] is the number of digital channels.
22. 根据权利要求18至21任一所述的装置,其特征在于,等效信道模块进一步用于在根据模拟预编码矩阵获得等效信道时,获取每个终端的近似信道h,并组成近似信道h ;根据模拟预编码矩阵与近似信道h获得等效信道。 22. An apparatus according to any one of claim 21 18, characterized in that the equivalent channel module is further used in obtaining the equivalent analog channel according to the precoding matrix, obtaining an approximate channel h each terminal, and an approximate composition H channel; obtained according to the equivalent channel matrix and the precoding approximation analog channel h.
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