CN1868147B - System and method for channel-adaptive antenna selection - Google Patents

System and method for channel-adaptive antenna selection Download PDF

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CN1868147B
CN1868147B CN 200480030570 CN200480030570A CN1868147B CN 1868147 B CN1868147 B CN 1868147B CN 200480030570 CN200480030570 CN 200480030570 CN 200480030570 A CN200480030570 A CN 200480030570A CN 1868147 B CN1868147 B CN 1868147B
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antenna
subset
output
receiver
error rate
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CN1868147A (en )
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塞韦林·卡特罗伊斯厄斯戈
文科·厄斯戈
杰克·温特斯
皮特·范鲁延
皮特·鲁
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美国博通公司
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Abstract

Systems and methods that provide channel-adaptive antenna selection in multi-antenna-element communication systems are provided. In one embodiment, a method that selects a subset of receive antennas of a receiver to receive a transmitted RF signal may include, for example, one or more of the following: establishing possible subsets of the receive antennas; determining sets of channel parameter statistics corresponding to the possible subsets of the receive antennas; computing output bit error rates of the receiver, each output bit error rate being computed based on at least one set of channelparameter statistics; selecting a particular possible subset of the receive antennas based upon a criterion predicated on the computed output bit error rates; and connecting one or more RF chains of the receiver to the receive antennas of the selected particular possible subset.

Description

信道自适应天线选择的方法及系统 The method of channel selection and adaptive antenna system

技术领域 FIELD

[0001] 本发明涉及通信系统,更具体地,涉及一种在多天线单元通信系统中进行天线选择的方法和系统。 [0001] The present invention relates to communication systems and, more particularly, relates to a method and system for selecting antennas in a multiple antenna communication system element.

背景技术 Background technique

[0002] 当前多数无线通信系统都由配有单个发射和接收天线的节点组成。 [0002] Most current wireless communication system by transmission and reception with a single antenna nodes. 据预测,通过使用多个发射和/或多个接收天线,很多通信系统的性能包括容量将得到充分的提升。 It is predicted that by the use of multiple transmit and / or multiple receive antennas, the performance of many of the communication system comprises a capacity will be fully improved. 这种天线配置形成了“智能”天线技术的基础。 This antenna configuration forms the basis of "smart" antenna technology. 结合时空信号处理的智能天线技术可用于降低输入信号多径衰落的有害影响和抑制干扰信号。 Smart antenna technology combined temporal signal processing may be used to reduce the deleterious effects of multipath fading input signal and suppress interfering signals. 这样,已有的或正在部署的数字无线系统(例如,基于CDMA的系统、基于TDMA的系统、WLAN系统和基于OFDM的系统如IEEE 802. Ila/ g)的性能和容量将得到提升。 Thus, conventional or digital radio system is being deployed (e.g., CDMA-based systems, TDMA-based systems, WLAN systems, and OFDM-based systems such as IEEE 802. Ila / g) capacity and performance will be enhanced.

[0003] 通过使用为在信号接收处理过程中引入分集增益和抑制干扰而设计的多单元天线系统,上述类型的无线系统的至少一些性能损害会得到部分地改善。 [0003] By using the multiple antenna system to introduce a diversity gain and to suppress interference in the received signal processing and design, at least some of the damage to the performance of wireless system type described above will be partially improved. 如JH Winters 等人在1994年2月《IEEE通信学报》第42卷2/3/4号1740-1751页中“The Impact of Antenna Diversity On the Capacity offfireless Communication Systems,,所介绍。ffl 过减轻多径以得到更均衡覆盖、增加接收信噪比以获得更大距离或降低所需的发射功率、 提供更好的稳健性以抗干扰、或者允许更多的频率重用以获得更大的容量,这种分集增益提升了系统性能。 As JH Winters et al., In February 1994, "IEEE Journal of Communications", Volume 42, No. 2/3/4 1740-1751 page "The Impact of Antenna Diversity On the Capacity offfireless Communication Systems ,, introduced .ffl had mitigate multipath diameter to give a more balanced coverage, increasing received SNR to achieve a greater distance or reducing the transmit power required to provide more robustness to jamming, or allows more frequency reuse to greater capacity, this species diversity gain boost system performance.

[0004] 在结合了多天线接收器的通信系统中,一组M个接收天线能消除MI个干扰。 [0004] In conjunction with multi-antenna receiver in a communication system, a set of M receive antennas can eliminate interfering MI. 因此,可以用N个发射天线在同一带宽上同时发射N个信号,接着,这N个发射信号被接收器的一组N个天线分成N个单独的信号。 Thus, with N transmit antennas simultaneously transmit N signals on the same bandwidth, then the N transmitted signals is divided into N separate signals a set of N receiver antennas. 这种系统通常称为多入多出(MIMO)系统,并已得到广泛研究。 Such systems are usually referred to as multiple input multiple output (MIMO) system, and has been widely studied. 例如,参见J. H Winters在《IEEE通信学报》1987年11月C0M-35卷11号的论文“Optimum combiningfor indoor radio systems with multiple users,,;C. Chuan 等人在1998年11月的《全球通信系统学会,98,澳大利亚,悉尼,IEEE 1998》1894-1899页的论文“Capacity of Multi-Antenna Array Systems In Indoor WirelessEnvironment";D. Shiu 等人在《IEEE通信学报》2000年3月48卷3号502-513页的论文''Fading Correlation and Its Effect on the Capacity ofMulti-Element Antenna Systems,,。 For example, see J. H Winters in "IEEE Journal of Communications" in November 1987 C0M-35 volume number 11 paper "Optimum combiningfor indoor radio systems with multiple users ,,;. C Chuan, who in November 1998" Global communication systems Society, 98, Sydney, Australia, IEEE 1998 "paper page 1894-1899" Capacity of Multi-Antenna Array systems in Indoor WirelessEnvironment ";. D Shiu et al.," the IEEE Journal on communications "Vol. 48, March 2000 3 No. paper '502-513 page' Fading Correlation and Its Effect on the Capacity ofMulti-Element Antenna Systems ,,.

[0005] 一些多元天线阵列(如ΜΙΜΟ)为系统增加了容量,这可通过使用上面提到的配置来实现。 [0005] Some multi-element antenna array (e.g. ΜΙΜΟ) increasing the capacity of the system, this can be achieved by using the above-mentioned configuration. MIMO系统中,在对接收器可适用信道的理想估算的假设之下,接收信号分解到M个“空间复用”的独立信道。 MIMO system, under the assumption applied over the receiver channel estimation, the received signal is decomposed into M "spatially multiplexed" independent channels. 这样使容量得以增加,相当于单天线系统的M倍。 This allows the capacity is increased, corresponding to M times the single antenna system. 在总发射功率固定的前提下,MIMO提供的容量与天线单元的数目成线性比例。 Under the premise of a fixed total transmit power, MIMO capacity offered linearly proportional to the number of antenna elements. 具体地,已证实:在总带宽和总发射功率不增加的情况下,具有N个发射和N个接收天线的数据速率可以是单天线系统的N倍。 In particular, it has been confirmed that: in case where the total bandwidth and the total transmit power does not increase, having N transmit data rate and N receive antennas may be N times that of a single antenna system. 例如,参见GJ Foschini 等人在Kluwer Academic Publishers 出版的1998 年3 月的《无线个人通信》第6卷第3号第311-335页上“On Limits offfireless Communications in a Fading Environment When Using MultipleAntennas在以N倍空间复用为基础的实验性ΜΙΜΟ系统中,通常在给定的发射器或接收器上使用超过N个的天线。因为每个额 See, eg, GJ Foschini et al., In "Wireless Personal Communications," March 1998, published by Kluwer Academic Publishers, page 311-335, Vol. 6 No. 3 "On Limits offfireless Communications in a Fading Environment When Using MultipleAntennas to the N fold spatial multiplexing based ΜΙΜΟ experimental systems, typically use more than the N antennas on a given transmitter or receiver. because the amount of each

6外的天线都增加分集增益和天线增益,而干扰抑制适用于所有的N个空间复用信号。 6 are outside the antenna diversity gain and to increase antenna gain, and the interference suppression for all N spatial multiplexed signals. 参见G· J· Foschini 等人在IEEE Journal on Selected Areas in Communications 1999 年11 月11 期17 卷1841-1852 页的"Simplified processing for highspectral efficiency wireless communication employing multi_elementarrays,,。 See G · J · Foschini et al, IEEE Journal on Selected Areas in Communications 11 November 1999, Volume 17 "Simplified processing for 1841-1852 page highspectral efficiency wireless communication employing multi_elementarrays ,,.

[0006] 虽然增加发射和/或接收天线的数目增强了MIMO系统的多方面性能,但是为每个发射和接收天线提供独立的RF链路使成本增加。 [0006] Although increasing the number of transmit and / or receive antennas enhances the performance of a MIMO system aspects, but separate RF chain for each transmit and receive antenna increases costs. 通常每个RF链路包括低噪声放大器、滤波器、下变频器和模-数转换器(A/D),其中,后三者占据了RF链路成本的主要部分。 Each RF chain generally comprises a low noise amplifier, filter, downconverter, and analog - digital converter (A / D), wherein the latter three occupying the major part of the cost of the RF link. 在一些现有的单天线无线接收器中,所需的单个RF链路的成本超过接收器总成本的30%。 In certain existing single-antenna wireless receivers, the cost required for a single RF link received over 30% of this assembly. 很显然,随着发射和接收天线增加,总的系统成本和功率消耗将显著地增加。 Clearly, with the transmitting and receiving antennas increases, overall system cost and power consumption will be significantly increased.

[0007] 目前已经找到一些处理上述缺陷的方法,如美国专利公开号为20020102950、名称% "Method and apparatus for selection and use ofoptimal antennas in wireless systems”;A. Molisch等人在2001年6月IEEE ICC学会,芬兰,赫尔辛基,2卷第570-574 M ^Capacity of MIMOSystems with antenna selection" ; L^i, ^ RS Blum ^ Λ ί 《IEEECommunications Letters)) 2002 年8 月第6 卷第8 期第322-324 页的"Onoptimum MIMO with antenna selection”,其中,从众多天线中选择发射/接收天线的子集。因为具有N倍的空间复用,所以至少要使用N个RF链路,典型地,从接收器上总共M个天线中选择N个天线和/或从发射器总共ητ个天线中选择N个天线,其中M > N并且ητ > N。 [0007] It has to find some method of treating the aforementioned drawbacks, as described in US Patent Publication No. 20020102950, ​​entitled% "Method and apparatus for selection and use ofoptimal antennas in wireless systems";. A Molisch et al., IEEE ICC in June 2001 Society of Finland, Helsinki, 2 vol. 570-574 M ^ Capacity of MIMOSystems with antenna selection "; L ^ i, ^ RS Blum ^ Λ ί" IEEECommunications Letters)) in August 2002, Vol. 6, No. 8 first 322- 324 of "Onoptimum MIMO with antenna selection", wherein the number of selected transmit antenna subset / receive antennas because N times with spatial multiplexing, so at least the use of N RF links, typically received from total of M antennas selects N antennas and / or selecting the N antennas from the transmitter antenna in the total ητ, wherein M> N and ητ> N.

[0008] 具有天线选择的系统的性能取决于选择过程中使用的标准。 [0008] The performance of the system depends on having an antenna selection criterion used in the selection process. 使用的标准不同,即使在相同的信道条件下也可能导致选择的天线子集不同,从而造成性能不同。 Different standards used, even under the same channel conditions can also lead to different selected subset of antennas, resulting in different performance. 部分上面提到的文献主张使用最大化容量的标准选择天线子集。 Parts of the above-mentioned document advocates the use of standard maximize capacity antenna subset selection. 但是,容量是一个理想量,该理想量可能是无法达到的,因为她需要完美的编码和/或均衡和/或连续的调制。 However, capacity is an ideal amount, the ideal amount may not be achieved, because she needs the perfect coding and / or equalization and / or continuous modulation. 实际上,使用的是有限编码(或者甚至没有编码)和量化调制,且均衡器不是理想的。 In fact, the use of coding is limited (or even no coding) and modulation quantization, and the equalizer is not desirable.

发明内容 SUMMARY

[0009] 本发明的一些方面涉及在多天线单元通信系统中提供信道-自适应天线选择的系统和方法。 [0009] Aspects of the invention is directed to provide an antenna unit in a multi-channel communication system - a system and method for adaptive antenna selection.

[0010] 根据本发明一些方面的一个实施例中,从具有M个天线单元的发射器或具有M个天线单元的接收器中选择N个天线的系统,其中N小于Μ,该系统包括:例如,M个天线单元发射器或M个天线单元接收器中的M个天线单元、N个RF链路、连接于该N个RF链路的开关。 [0010] According to a number of aspects of the present invention embodiment, the transmitter has M antenna elements or with a selected N antennas M receive antenna elements in the system, where N is less than [mu], the system comprising: e.g. , M antenna unit transmitter antenna elements or receivers M M of antenna elements, N RF links, connected to the switch of the N RF links. 所述M个天线单元接收器为该M个天线单元中每个可能的N天线单元子集计算输出误码率。 The M antenna element outputs the receiver calculates the error rate for the M antenna units possible for each subset of N antenna elements. 每个输出误码率都基于至少一组信道参数统计而计算。 Each output bit error rate statistics are calculated based on at least one set of channel parameters. 该M个天线单元接收器根据以所计算的输出误码率为基础的标准选择特定的N天线单元子集。 The M antenna unit receiver to select a particular subset of N antenna elements according to the output of the bit error rate calculated based criteria. 作为对基于所述标准选择特定的N天线单元子集的响应,所述开关将N个RF链路连接到该特定N天线单元子集的N天线单元上。 As a response to the subset of the N antenna elements based on the selection of a particular standard, the switch will be connected to the N RF links to the particular subset of antenna elements N N antenna unit.

[0011] 根据本发明一些方面的另一个实施例中,选择接收器的接收天线的子集来接收所发射的RF信号的方法包括,例如,以下一项或多项:建立接收天线的可能的子集;确定与所述接收天线的可能的子集对应的信道参数统计;计算接收器的输出误码率,每个输出误码率都基于至少一组信道参数统计而计算;根据以所计算的输出误码率为基础的标准选择接收天线的特定的可能子集;将接收器的一个或多个RF链路连接到所选择的特定的可能子集的接收天线上。 [0011] According to some of the sub-receive antenna according to another aspect of the embodiments of the invention, the set of selected receiver receives the transmitted RF signal comprising, for example, one or more of the following: a receiving antenna for a possible subset; determining a subset of possible receiving antenna corresponding to the channel statistic parameter; calculating a bit error rate of the receiver output, each output bit error rate are calculated based on at least one set of parametric statistical channel; calculated according to the error rate output based on specific selection criteria may receive antenna subset; a receiver or a plurality of links connected to the selected RF receiving antenna-specific subset of the possible.

[0012] 根据本发明一些方面的再一个实施例中,选择发射器的发射天线的子集以发射RF 输入信号的方法,其中所发射的RF输入信号作为随后被接收器接收的多个输出RF信号,所述方法包括,例如,以下一项或多项:建立发射天线的可能的子集;确定与所述发射天线的可能的子集对应的信道参数统计组;选择分别与各组信道参数统计对应的发射模式;计算接收器的输出误码率,每个输出误码率都基于至少一组信道参数统计以及至少一种所选择的发射模式计算;根据至少以所计算的输出误码率为基础的标准选择发射天线的特定的可能子集;将发射器的一个或多个RF链路连接到所选择的特定的可能子集的发射天线上。 [0012] According to further aspects of the invention, an embodiment of the present embodiment, a subset of selected emitters transmit antenna to transmit an RF input signal method, wherein the RF input signal as a plurality of the transmitted RF output is then received by the receiver signal, the method comprising, for example, one or more of the following: establishment of possible subsets of the transmit antennas; determining statistical channel parameters and the set of possible subsets of the transmit antenna corresponding to; respectively selected channel parameter groups statistical corresponding transmission mode; calculating a bit error rate of the receiver output, based on each output bit error rates are at least a set of channel parameters and statistics at least one selected transmission mode is calculated; at least according to the output of the error rate calculated selecting a transmission antenna based on a specific standard for possible subsets; one or more RF transmitter links connected to the selected transmit antenna may be specific subset on.

[0013] 根据本发明一些方面的另一个实施例中,提供一种在包括发射器和接收器的通信系统中选择天线的方法,所述发射器包括发射天线,该发射天线使用两个或多个RF发射链路通过信道发射一组空间复用的RF输出信号。 [0013] According to another aspect of some embodiments of the invention, there is provided a method of selecting an antenna in a communication system includes a transmitter and a receiver, said transmitter comprises a transmitting antenna, the transmitting antenna using two or more a set of RF output signals spatially multiplexed link transmission through a RF transmission channel. 所述接收器包括接收天线,该接收天线用于接收该组空间复用的RF输出信号和相应地生成一组经两个或多个RF链路处理的空间复用的接收RF信号。 The receiver comprises a receiving antenna, a receiving antenna for receiving the RF output signal of the set of spatial multiplexing and correspondingly generate a set of received RF signals RF link processing space via two or more multiplexed. 所述方法包括以下一项或多项:建立该发射天线的可能的子集和该接收天线的可能的子集;确定对应于该发射天线的可能子集之一和该接收天线的可能子集之一的各种组合的信道参数统计;选择分别与各种信道参数统计对应的发射模式;计算接收器的输出误码率,每个输出误码率都基于至少一组信道参数统计以及所选择的相应的发射模式而计算;根据至少以所计算的输出误码率为基础的标准选择发射天线的特定的可能子集和接收天线的特定的可能子集;将所述两个或多个RF发射链路连接到所选择的特定的发射天线的可能子集上;将两个或多个RF接收链路连接到所选择的特定的接收天线的可能子集上ο Said method comprising one or more of: the establishment of possible subset of possible subsets of the transmit antennas and the receive antennas; determining a subset may correspond to one of the transmitting antenna and the receiving antenna subset may channel parameters of the various combinations of one statistic; respectively selecting various statistical parameters corresponding channel transmission mode; calculating a bit error rate of the receiver output, based on each output bit error rates are at least a set of channel parameters and the selected statistical corresponding calculated radiation pattern; may be a specific subset of possible specific subset of receive antennas and transmit antenna selection according to the output of at least the calculated error rate based criteria; the two or more RF ο a particular subset of possible receiving antenna receives two or more RF links are connected to a selected; may transmit on a subset of the specific links connected to the selected transmission antenna

[0014] 根据本发明一些方面的又一个实施例中,提供一种在包括发射器和接收器的通信系统中选择天线的方法。 [0014] embodiment, there is provided an alternative antenna in a communication system includes a transmitter and a receiver in accordance with yet another embodiment of some aspects of the present invention. 所述发射器包括发射天线,该发射天线使用一个或多个RF发射链路通过信道发射一组RF输出信号。 The transmitter includes a transmitting antenna, the transmitting antenna using one or more RF transmit link transmit an RF output signal via a set of channels. 所述接收器包括接收天线,该接收天线用于接收该组RF 输出信号和相应地生成一组经一个或多个RF接收链路处理的接收RF信号。 The receiver includes a receiving antenna, the receiving antenna for receiving the RF output signal and the corresponding group generates a set of one or more RF links reception processing of received RF signals. 所述方法包括以下一项或多项:建立该发射天线的可能的子集和该接收天线的可能的子集;确定对应于该发射天线的可能子集和该接收天线的可能子集的各种组合的信道参数统计;选择分别与各种信道参数统计对应的发射模式;计算接收器的输出误码率,每个输出误码率都基于至少一组信道参数统计以及所选择的相应的发射模式而计算;根据至少以所计算的输出误码率为基础的标准选择发射天线的特定的可能子集和接收天线的特定的可能子集;将所述一个或多个RF发射链路连接到所选择的特定的发射天线的可能子集上;将所述一个或多个RF接收链路连接到所选择的特定的接收天线的可能子集上。 Said method comprising one or more of: the establishment of possible subset of possible subsets of the transmit antennas and the receive antennas; determining a subset may correspond to the transmitting antenna and the receiving antenna of each possible subset combination of channel parameter statistics; respectively selecting various statistical parameters corresponding channel transmission mode; calculating a bit error rate of the receiver output, each output bit error rate is based on at least one set of statistics, and the channel parameters corresponding to the selected emission calculation mode; may select a particular subset of possible specific subset of receive antennas and transmit antenna according to output at least the calculated bit error rate based criteria; the one or more links connected to the RF transmitter the possible subsets of the particular receiver antenna of the plurality of RF receiver or a connection to the selected link; on a specific subset of transmit antennas may be selected.

[0015] 通过以下的描述和附图,可以更深入地理解本发明的各种优点、各种特性各个方面及其实施例的细节。 [0015] The following description and drawings, may be more fully understood from the advantages of the present invention, details of the embodiments of various aspects and embodiments various characteristics. 其中,同一个附图标记在各幅附图中用于表示相同的或相似的部件。 Wherein the same reference numerals in the various figures to refer to the same or like parts.

附图说明 BRIEF DESCRIPTION

[0016] 图IA和图IB是常规的MIMO系统的示意图; [0016] FIGS. IA and FIG. IB is a schematic view of a conventional MIMO system;

[0017] 图2A和图2B是根据本发明一些方面的MIMO系统的示意图; [0017] FIGS. 2A and 2B are schematic MIMO system according to some aspects of the present invention;

[0018] 图3是根据本发明一些方面的SM-MIM0-0FDM系统的示意图; [0018] FIG. 3 is a schematic view of the system according to the SM-MIM0-0FDM some aspects of the present invention;

[0019] 图4A和图4B是根据本发明一些方面进行天线选择的流程图;[0020] 图5是根据本发明一些方面导致的性能变化的示意图; [0019] FIGS 4A and 4B are a flowchart of an antenna selection is performed in accordance with some aspects of the invention; [0020] FIG. 5 is a schematic view of performance variations result in accordance with some aspects of the invention;

[0021] 图6是根据本发明一些方面的SC-MM0-0FDM系统的示意图; [0021] FIG. 6 is a schematic view of the system according to SC-MM0-0FDM some aspects of the present invention;

[0022] 图7是根据本发明一些方面的DS-SS SIMO系统中的接收器的示意图。 [0022] FIG. 7 is a schematic diagram of the receiver system DS-SS SIMO some aspects of the present invention. FIG.

具体实施方式 detailed description

[0023] 一、概述 [0023] I. Overview

[0024] 本发明一些方面的一些实施例涉及使用具有多个天线单元的发射器和/或接收器的通信系统。 [0024] Some embodiments according to some aspects of the present invention relates to a communication system using a transmitter and / or receiver having a plurality of antenna elements.

[0025] 本发明一些方面的一些实施例涉及在多天线单元通信系统中提供信道_自适应天线选择的方法和系统。 [0025] Some embodiments according to some aspects of the present invention relates to providing a method and system for channel selection _ adaptive antenna in a multiple antenna communication system element.

[0026] 实施本发明一些方面的一些实施例,有助于根据至少部分地以所计算的输出误码率为基础的标准在一个或多个多天线无线通信设备中选择天线单元子集。 [0026] Some embodiments of the subset, the antenna unit facilitates selection of one or more multi-antenna wireless communication device according to at least partially to the standard error output based on the calculated rate of some aspects of the embodiments of the present invention.

[0027] 实施本发明一些方面的一些实施例,有助于在一个或多个多天线无线通信设备中选择天线单元的子集,从而使误码率(BER)最小化或最优化。 [0027] Some aspects of embodiments of the invention some embodiments, helps to select a subset of antenna elements in one or more multi-antenna wireless communication device, such that the bit error rate (BER) is minimized or optimized.

[0028] 实施本发明一些方面的一些实施例,有助于根据至少部分地以所计算的输出误码率为基础的标准在一个或多个多天线无线通信设备中信道_自适应地选择天线单元子集。 [0028] Some aspects of embodiments of the present invention, some embodiments according to the output contributes to the calculated bit error rate based criteria at least partially adaptively selecting one or more multi-antenna wireless communication apparatus antenna of channels _ subset of cells.

[0029] 实施本发明一些方面的一些实施例,能够使用比射频(RF)链路数目更多的天线单元。 [0029] Some embodiments according to some aspects of the embodiments of the present invention, it is possible to use more than a radio frequency (RF) links the number of antenna elements. 本发明一些方面的一些实施例以具有成本效益的方式提高了系统性能。 Some embodiments according to some aspects of the present invention in a cost-effective way to improve system performance.

[0030] 可以使用本发明一些方面的一些实施例来选择多天线发射器中天线单元的子集以发射信号和/或选择多天线接收器中天线单元的子集以接收信号。 [0030] Some embodiments may be used according to some aspects of the present invention to select a subset of antennas in a multi-antenna transmitter unit to transmit signals and / or selecting a subset of multiple antenna receiver antenna elements to receive signals.

[0031] 本发明一些方面的一些实施例中,至少部分地根据至少部分地以所计算的输出误码率为基础的标准来选择天线单元的子集。 Some embodiments [0031] Some aspects of the present invention, at least in part, to select a subset of the antenna elements to output at least partially according to the calculated bit error rate based criteria.

[0032] 本发明一些方面的一些实施例中,至少部分地基于最小误码率来选择天线单元的子集。 [0032] Some embodiments of the present invention, in some aspects, at least in part based on minimum error rate to select a subset of antenna elements.

[0033] 本发明一些方面的一些实施例适用于使用,例如,码分多址信号、扩频信号、单载波信号、多载波信号、正交频分复用信号和超宽带信号、时空分集信号和空间复用信号的通信系统。 [0033] Some embodiments according to some aspects of the present invention is applicable to, for example, code division multiple access signal, a spread spectrum signal, a single carrier signal, the multi-carrier signal, an orthogonal frequency division multiplexed signal and the ultra-wideband signal, space-time diversity signals and spatial multiplexing communication system signal.

[0034] 本发明一些方面的一些实施例中,至少部分地根据以与一个或多个通信信道相关的参数(例如统计参数)为基础的最小误码率来选择天线单元的子集。 [0034] Some embodiments of the present invention, in some aspects, at least in part, to select a subset of the antenna elements to the minimum error rate parameters (e.g., statistical parameters) associated with one or more communication channels based. 本发明一些方面的一些实施例中,至少部分地基于根据一个或多个适用的通信信道的参数统计而计算出的最小误码率来选择天线单元的子集。 Some embodiments according to some aspects of the present invention, at least in part based on the statistical parameters calculated according to one or more communication channels suitable minimum error rate is selected subset of antenna elements.

[0035] 本发明一些方面的一些实施例可用于在多入多出(MIMO)通信系统中选择天线。 [0035] Some embodiments according to some aspects of the present invention may be used to select the antenna multiple input multiple output (MIMO) communication system. 例如,MIMO通信系统提供发射器,该发射器通过N个发射天线单元广播多个(N个)空间复用信号,该N个天线单元是从一组ητ个天线单元中选取,其中ητ > N。 For example, the MIMO communication system provides a transmitter, the transmitter via the N transmission antenna unit broadcasting a plurality of (N) spatially multiplexed signals, the N antenna elements are selected from the group ητ antenna unit, wherein ητ> N . 例如,ΜΙΜΟ通信系统提供接收器,该接收器中共M个天线单元,从其中选择N个接收天线单元,其中M > N,该N 个接收天线单元生成的输出信号数目等于空间复用信号的数目。 For example, ΜΙΜΟ communication system provides a receiver, this receiver CCP M antenna elements, from which select N receiving antenna units, where M> N, the number of output signals of the N receiving antenna units generated equivalent to the number of signals of the spatially multiplexed . 然后该输出信号被提供给对应的RF链路以在基带中处理。 The output signal is then supplied to the corresponding RF link to processing in baseband. 这样,本发明一些方面的一些实施例有利于使BER最小化(例如,信道-自适应的BER最小化)和/或降低多天线系统中RF信号的处理成本。 Thus, some embodiments of the present invention is some aspects beneficial that the BER is minimized (e.g., channel - adaptive minimizing BER) and / or reduce the cost of multi-antenna system processing RF signals.

[0036] 根据本发明一些方面的一些实施例提供一种发射器,该发射器包括一个或多个RF [0036] provided A transmitter in accordance with some embodiments according to some aspects of the present invention, the transmitter includes one or more RF

9链路和特定数量的发射天线,其中,RF链路的数量等于或少于发射天线的数量。 Number of links 9 and a specific number of transmit antennas, wherein the number is equal to or less than RF link transmit antennas. 根据本发明一些方面的一些实施例提供一种系统和/或方法,例如,选择特定的多个发射天线的子集, 被选择的天线子集发射RF输入信号,所发射的RF信号随后作为多个RF输出信号由接收器接收。 According to some embodiments provided according to some aspects of the present invention is a system and / or method, e.g., select a specific subset of a plurality of transmit antennas, transmitting antenna subset selected RF input signal, an RF signal is then transmitted as a multi- a RF output signal received by the receiver. 建立特定多个发射天线的多个可能子集(例如,其数目等于或小于包括特定数量的发射天线或其他类型组合特性的可能子集的数目)。 Establishing a plurality of antennas may transmit a plurality of specific subsets (e.g., the number of which is equal to or less than the number of possible subsets comprises a specific number of transmit antennas or other types of combination of properties). 确定对应于该特定多个发射天线的可能子集的多组信道参数统计或其他参数。 Determined corresponding to the specific plurality of sets of a plurality of transmitting antennas is believed possible subset channel statistical parameters or other parameters. 选择与相应的信道参数统计对应的发射模式或其他类型的模式。 Selecting the appropriate transmission mode corresponding to the channel statistical parameters or other types of patterns. 所述发射模式包括,例如,调制水平和/或编码率。 The transmission mode comprises, for example, the modulation level and / or coding rate. 例如,计算接收器的多个BER(如输出BER)。 For example, a plurality of the receiver calculated BER (such as the output BER). 其中,每一个输出BER都至少部分地基于一组信道参数统计和/或相应的所选择的发射模式来计算。 Wherein each output BER are calculated based at least in part a set of parameters channel statistics and / or the respective transmission modes selected. 例如,特定多个发射天线的可能子集可以基于至少部分地根据输出BER和/或所选择的发射模式而定的标准来选择。 For example, a specific subset of the plurality of possible transmit antennas may be selected based at least in part based on the output BER and / or transmit the selected mode and a given standard. 接着,一个或多个RF链路被连接到所述发射天线上或特定多个发射天线中被选择的可能子集的发射天线上。 Next, one or more RF links are connected to the emitter of the transmitting antenna may be a subset of the plurality of antennas or a particular transmit antennas is selected.

[0037] 根据本发明一些方面的一些实施例提供信道参数统计,其包括,一阶统计、二阶统计和更高阶统计。 [0037] Statistics providing channel parameters in accordance with some embodiments according to some aspects of the present invention, which comprises, a first-order statistics, higher order statistics and second-order statistics. 信道参数统计包括以下一项或多项:例如,接收器的输出信噪比、输出信号与干扰及噪声比、似然率(例如对数似然率)、信号群的欧几里得距离(Euclidean distance)。 Channel parameters comprises one or more statistics: For example, the receiver output signal to noise ratio of the output signal to interference and noise ratio, the likelihood ratio (e.g., log likelihood ratio), the Euclidean distance of the signal group ( Euclidean distance). 例如,信道参数统计可在频域或时域上计算。 For example, channel parameters may be calculated statistically in the frequency or time domain.

[0038] 根据本发明一些方面的天线选择方法的一些实施例可用于不同类型的多天线通信系统中。 [0038] According to some aspects of the present invention is an antenna selection method according to some embodiments may be used for different types of multi-antenna communication system. 在特定的实施例中,可将根据本发明一些方面的天线选择方法的一些实施例应用到单信道(SC)系统(如,没有空间复用的系统)的多天线接收器中,应用到单信道系统的多天线发射器中或应用到使用空间复用(SM)或单信道的MIMO系统的发射器和/或接收器中。 In a particular embodiment, may be applied according to the antenna selection method according to some embodiments according to some aspects of the present invention to the single channel (SC) system (e.g., no system spatial multiplexing) multiple-antenna receiver, applied to a single the transmitter system of a multi-antenna MIMO transmitter channel system or to the spatial multiplexing (SM) or single channel and / or receiver.

[0039] 例如,根据本发明一些方面的一些实施例,从一组M个可用的天线单元中选取N个接收天线单元(其中M > N),例如,考虑多种信道参数统计时,所选择的天线单元的子集使BER最小化。 [0039] For example, in accordance with some embodiments according to some aspects of the present invention, selecting N receive antenna elements (where M> N) from a set of M available antenna elements, e.g., considering the more channel parameter statistics, the selected the subset of antenna elements causes the BER is minimized. 实现过程如下:首先建立多个发射天线的可能子集和M个接收天线的可能子集。 Process is as follows: Firstly, a plurality of possible subsets of the transmit antennas and M receive antennas possible subsets. 该方法还包括确定对应于发射天线的可能子集之一和接收天线的可能子集之一的各种组合的多组信道参数统计。 The method further comprises determining a plurality of sets of channel parameters of various combinations of statistics corresponds to one of the transmit antennas may be one of a subset of possible sub-sets and receive antennas. 选择分别与所述多组信道参数统计对应的多个发射模式。 Selecting a plurality of modes respectively transmit the plurality of sets of statistical parameters corresponding to the channel. 另外,至少部分地基于所述多组信道参数统计中的一组参数统计及对应的多个发射模式中的一个模式来计算接收器的多个输出误码率。 Further, at least in part calculates a plurality of output bit error rate of a receiver based on the plurality of model parameters of the transmission modes a set of multiple groups of channel parameters and statistics of the statistics of the corresponding. 接着,基于一定的标准选择多个发射天线的一个可能子集和多个接收天线的一个可能子集,其中,该标准至少部分地根据所述多个输出误码率及多个发射模式而确定。 Then, selecting a plurality of transmit antennas based on certain criteria may be a subset of possible sub-sets and a plurality of receive antennas, wherein at least part of the standard is determined in accordance with the plurality of output bit error rate and a plurality of transmission modes . 该方法还包括:将一个或多个RF发射链路连接到多个发射天线的所述一个可能子集和将一个或多个RF接收链路连接到多个接收天线的所述一个可能子集上。 The method further comprising: connecting one or more of the RF link to transmit the plurality of transmit antennas and a possible subsets of one or more links connected to the plurality of RF receiving antennas receiving a subset of possible on.

[0040] 根据本发明一些方面的一些实施例提供一种标准,例如,该标准基于以下一项或多项:输出误码率、发射模式、输出误码率的最小值、数据速率的最大值、接收器第一级上的数据速率的最大值和接收器第二级上的输出误码率的最小值。 [0040] Some embodiments provide a modular embodiment according to some aspects of the present invention, e.g., the standard based on one or more of: a maximum output bit error rate, transmission mode, the minimum value of the output bit error rate, the data rate , the minimum value of the output bit error rate on the data rate of the second stage on the first stage receives the maximum value and the receiver.

[0041] 当单信道或空间复用MIMO系统在发射端和/或接收端使用多个RF链路的情况下,可将确定的基带加权和组合方案与天线选择方法相结合,一起应用到发射器(如预编码)和/或接收器中。 [0041] In the case where the channel or spatial multiplexing MIMO system uses a plurality of RF link at the transmitting end and / or the receiving end, may be a baseband weighting and combining schemes and antenna selection method of the determined combination, applied together to the emitter (such as pre-coding), and / or receiver. 例如,将基带加权和天线选择都设计成使BER最小化。 For example, the baseband antenna selection weights are designed such that the BER is minimized. 在另一个实施例中,例如,在通过适当的天线选择使BER最小化的同时,可将基带加权设计成使输出信噪比(SNR)、信号与干扰及噪声比(SINR)或容量最大化。 In another embodiment, for example, choose to make the BER minimized by appropriate antenna, while the base tape may be designed such that the weighted output SNR (the SNR), signal to interference and noise ratio maximized (SINR) or volume . [0042] 根据本发明一些方面的一些实施例涉及用于多天线系统,包括如N倍空间复用的多天线系统中,基于最小化BER选择天线的信道-自适应方法和/或系统。 [0042] According to some embodiments according to some aspects of the present invention relates to a multi-antenna system, such as the multi-antenna system comprising N times the spatial multiplexing, based on minimizing the BER of the channel selection antenna - adaptive methods and / or systems. 为了使根据本发明一些方面的一些实施例易于理解,下面提供用于在多天线系统中实现天线选择的典型的架构的概况。 In order for ease of understanding some embodiments according to some aspects of the present invention, the following provides an overview for a typical architecture enable antenna selection in a multiple antenna system. 随后,还提供与基于最小化BER进行信道-自适应的天线选择的系统和方法相关的其他细节。 Then, also provided with a channel based on minimizing the BER - systems and adaptive antenna selection method for other details related.

[0043] 二、用于天线选择的架构 [0043] Second, the architecture for the antenna selection

[0044] 根据本发明一些方面的一些实施例可用于无线通信系统中,该无线通信系统中, 发射器和/或接收器使用的RF链路数目少于使用的发射/接收天线的数目。 [0044] According to some embodiments according to some aspects of the present invention can be used in a wireless communication system, the wireless communication system, the number of RF link transmitter and / or receiver using transmit using less than / the number of receiving antennas. 在根据本发明一些方面的一些实施例中,从总共M个接收天线单元中选择N个接收天线单元,其中M > N。 In some embodiments according to some aspects of the present invention, the N receiving antenna units selected from a total of M receive antenna elements, wherein M> N. 这样生成N个RF输出信号,接着,该N个RF输出信号通过N个RF链路。 Such generate N output RF signal, then the N RF output signals through N RF links. 在一个典型的实施例中,每个RF链路包括,例如滤波器、下变频转换器和A/D转换器。 In one exemplary embodiment, each RF link includes, for example, a filter, a downconverter and A / D converter. 接着,每个RF链路的A/D转换器产生的输出信号被数字处理以产生N个空间复用的输出信号。 Then, the output signal of each RF link A / D converter produces a digital processing to produce an output signal N spatial multiplexing. 通过在RF执行必需的天线子集的选择,具有多于N个的接收天线,但只有N个RF链路的N倍空间复用系统的实现成本与具有N个接收天线的系统的成本近似。 Approximated by performing the necessary antenna subset selection in the RF, having more than N receive antennas, but only N RF chains N-fold spatial multiplexing system implementation costs with the cost of the system having N receive antennas. 因此,在相对低成本下通过使用额外的天线能提升接收器性能。 Thus, at relatively low cost by using an additional antenna can enhance receiver performance.

[0045] 可在具有N个RF链路和ητ个发射天线的发射器上使用类似的技术,其中ητ > N。 [0045] Similar techniques can be used in the transmitter has N RF links and ητ transmit antennas, wherein ητ> N. 在一个实施例中,该N个RF链路后紧接着开关,该开关将每个RF链路连接到从ητ个发射天线中选取的N个发射天线的子集上。 In one embodiment, after the N RF links immediately switch which connects each of the RF link to the selected subset of transmit antennas ητ from the N transmit antennas. 与在接收器中一样,通过在RF执行必需的天线的子集的选择,具有多于N个的发射天线,但只有N个RF链路的N倍空间复用的系统的实现成本与具有N个发射天线和N个RF链路的系统的成本近似。 As in the receiver by selecting a subset of antennas to perform the necessary RF, having more than N transmit antennas, but only N times to achieve cost N RF links spatial multiplexing system having a N cost of the system transmit antennas and N RF links approximation. 因此,在相对低成本下通过使用额外的天线能提升发射器性能。 Thus, at relatively low cost by using an additional antenna can enhance the performance of the transmitter.

[0046] Α、空间复用 [0046] Α, spatial multiplexing

[0047] 根据本发明一些方面的一些实施例,空间复用(SM)提供一种基于在发射器和接收器上均使用多个天线的信号发射模式,这种模式下,能够增加无线链路的比特率而不需要增加相应的功率或带宽消耗。 [0047] According to some embodiments according to some aspects of the present invention, the spatial multiplexing (SM) providing a signal based on the transmission mode using multiple antennas both at the transmitter and receiver, in this mode, the radio link can be increased without increasing the bit rate corresponding power or bandwidth consumption. 当接收器和发射器都使用N个天线的情况下,提供给发射器的信息符号的输入流被分成N个独立的子码流。 In the case where the receiver and transmitter are using the N antennas, the input stream is provided to the transmitter information symbols is divided into N separate substreams. 空间复用试图让每个子码流都占据可适用的多址协议中相同的“信道”(如,时隙、频率或编码/键序列)。 Spatial multiplexing try to make each substream are applicable occupy the same multiple access protocol, "channels" (e.g., time slots, frequencies, or codes / key sequence). 在发射器中,每个子码流分别加到该N个发射天线上并通过居间多径通信信道传播给接收器。 In the transmitter, are applied to each sub-stream and transmitted to the receiver through a multipath communication channel is intervening on the N transmit antennas. 接着,接收器配置的N个接收天线的接收阵列接收复合的多径信号。 Next, the configuration of the receiver array receives the N receive antennas receives the composite multipath signal. 在接收器上,对来自接收天线阵列的相对于给定子码流的N个相位和N个振幅定义的“空间签名”进行估算。 At the receiver, from the phase of the receive antenna array to estimate the "spatial signatures" of the N phases of a given sub-stream and the N-defined amplitude. 接着,应用信号处理技术以分离接收到的信号,该信号处理技术使原始子码流得以还原和合成到原始输入符号流中。 Next, signal processing techniques to separate the received signal, the signal processing techniques is that the original sub-stream to restore the original input symbol and synthesis stream. JH Winters在《IEEE通信学报》1987年11月C0M-35卷11号的论文”Optimum combining for indoor radiosystems with multiple users,,中进一步阐述了空间复用通信的原理和典型的系统实现。本发明全面参考了该论文。 JH Winters in the number of papers 11 November 1987 C0M-35 volume "IEEE Journal on Communications" "Optimum combining for indoor radiosystems with multiple users ,, in further elaborated spatial multiplexing implemented principles and typical communication system. The present invention fully refer to the paper.

[0048] B、常规的MIMO系统 [0048] B, the conventional MIMO system

[0049] 通过考虑图1所示的常规MIMO系统,能够充分地阐述本发明的一些方面。 [0049] By considering the conventional MIMO system shown in Figure 1, can be sufficiently illustrate some aspects of the invention. 如图1 所示,图1中MIMO系统100包括图IA所示的发射器110和图IB所示的接收器130。 As shown includes a transmitter 100 shown in FIG. IA 110 and shown in FIG. 1, FIG. 1 IB receiver shown a MIMO system 130. 发射器110和接收器130分别包括数目为T的一组RF发射链路和数目为R的一组RF接收链路, 这些RF链路被配置以发射和接收数目为N的一组空间复用信号。 The transmitter 110 and receiver 130 each comprises a number of links and the number of T transmit a set of RF links as a set of RF receiver R, and the RF link is configured to transmit and the number of receivers is a set of spatial multiplexing N signal. 系统100中,假设以下之一:⑴T大于N,R等于N; (ii)T等于N,R大于N;或者(iii) T和R都大于N。 In system 100, assume one of the following: ⑴T greater than N, R is equal to N; (ii) T is equal to N, R is greater than N; or (iii) T and R are greater than N.

[0050] 参考图1A,将要发射的输入信号S,该信号典型地包括数字符号码流,由解复用器102分离成N个独立的子码流S1>2......, N。 [0050] Referring to Figure 1A, an input signal to be transmitted S, the signal typically comprises a number of characters stream separated by the demultiplexer 102 into N independent substreams S1> 2 ......, N . 接着,子码流Su......, N被发送给数字信号处理器 Next, sub-stream Su ......, N is sent to a digital signal processor

(DSP) 105,DSP 105生成T个输出信号T1,2......,τ。 (DSP) 105, DSP 105 generates output signals T T1,2 ......, τ. 该T个输出信号T1,2......^通常由将N个子 The output signal T T1,2 ...... ^ usually consists of N sub-

码流S1>2......,Ν通过加权而生成,即通过用T个不同的加权因子对该N个子码流Su...,Ν中的每 Stream S1> 2 ......, Ν generated by weighting, i.e. by treatment with T different weighting factors for the N sub-streams Su ..., Ν each

个子码流权进行加权(如,用一个复数相乘)而形成NT个码流。 Sub-stream is weighted (e.g., multiplied by a complex number) to form the NT streams. 接着,将该N ·Τ个码流组合以形成T个输出信号1\,2......,τ。 Subsequently, the number N · Τ streams are combined to form output signals T 1 \, 2 ......, τ. 然后,用T个数字-模拟(D/A)转换器108将该T个输出 Then, T digital - analog (D / A) converter 108 the output T

信号1\,2......,τ转换成T个模拟信号Ali2......,τ。 Signal 1 \, 2 ......, τ T is converted into analog signals Ali2 ......, τ. 通过在混频器112中将本地振荡器114产生的 In the mixer 114 is generated by the local oscillator 112 will be of

信号与该T个模拟信号Ali2......,τ混频将该T个模拟信号A^.q上变频到合适的发射载波RF T signal and the analog signal Ali2 ......, τ mixing the A ^ T analog signals to the appropriate transmit carrier frequency on the RF .q

频率。 frequency. 接着,该T个RF信号(如RFu......,τ)由相应的放大器116放大并由相应的天线118发射。 Subsequently, the RF signal to T (e.g. RFu ......, τ) is amplified by a corresponding amplifier 116 by a respective transmit antenna 118.

[0051] 现在参考图1Β,发射器100发射的RF信号被安装在接收器130上的R个接收天线131接收。 [0051] Referring now to FIG 1Β, RF signals transmitted by the transmitter 100 is received by receiver 130 mounted on the R receive antennas 131. 接收天线131接收的R个信号中的每个信号都被相应的低噪放大器133放大并通过滤波器135滤波。 Each signal of R signal receiving antenna 131 are received in a respective low noise amplifier 133 amplifies and filtered by the filter 135. 接着,利用混频器137将所得到的滤波信号从RF下变频到基带,每个混频器都由本地振荡器138提供一个本振信号。 Subsequently, the mixer 137 using the obtained filtered signal conversion from RF to baseband, each mixer 138 by local oscillator provides a local oscillator signal. 虽然图IB中的接收器都被配置成零差接收器,但也可以使用以中频(IF)频率为特征的外差接收器。 Although the receiver of FIG. IB are configured as a homodyne receiver, but may also be used in an intermediate frequency (IF) frequency characteristic heterodyne receiver. 然后,使用一组对应的R个模拟_数字(A/D)转换器140将混频器137产生的R个基带信号转换成数字信号。 Then, using a corresponding set of R _ analog digital (A / D) converter 140 converts the R mixer 137 generates a baseband signal to a digital signal. 接着, 数字信号处理器142将该R个数字信号Dli2......, E加权和组合以形成N个空间复用输出信号 Subsequently, the digital signal processor 142 the digital signal R Dli2 ......, E weighted and combined to form an output signal spatial multiplexing N

S' !,2......,N,该N个空间复用输出信号S' ......,N包括发射信号S1>2......,,的估算。 S '!, 2 ......, N, the N spatially multiplexed output signal S' ......, N comprises transmission signal S1> 2 ...... ,, estimation. 然后,多 Then, more than

路复用器155将该N个输出信号S' u......, N进行多路复用以产生原始输入信号S的估算 The multiplexer 155 N output signals S 'u ......, N multiplexed to produce estimates of the original input signal S

160 (S')。 160 (S ').

[0052] C、空间复用通信系统中RF的天线选择 [0052] C, a spatial multiplexing communication system, an RF antenna selection in

[0053] 现在参见图2,图2所示为具有发射器210和接收器250的MIMO通信系统200,发射器210和接收器250在配置上能够仅使用N个发射/RF接收链路实现N倍的空间复用, 即使发射器210和接收器250上分别装配有多于N个的发射/接收天线。 [0053] Referring now to FIG. 2, FIG. 2 shows a MIMO communication system having a transmitter 210 and a receiver 200, 250, transmitter 210 and receiver 250 in the configuration using only the N transmit / RF receive chains to achieve N times the spatial multiplexing, even if the transmitter 210 and the receiver 250 are equipped with more than N transmit / receive antennas. 具体地,发射器210包括一组MT个发射天线240,接收器包括一组MR个接收天线260,在本发明一些方面的一些实施例中,MT和/或MR大于或等于N。 Specifically, the transmitter 210 comprises a set of MT 240 transmit antennas, the receiver comprising a set of MR receive antennas 260, in some embodiments, some aspects of the present invention, MT and / or MR greater than or equal to N. 例如,(i)MT大于N,MR等于N ; (ii)MT等于N, MR大于N;或着(iii) MT和MR都大于N。 For example, (i) MT is greater than N, MR is equal to N; (ii) MT is equal to N, MR is greater than N; or with (iii) MT and MR are greater than N.

[0054] 如图2A所示,将要发射的输入信号S被解复用器202分离成N个独立的子码流SSli2......,N。 As shown in [0054] As shown in FIG. 2A, the input signal S to be transmitted to the demultiplexer 202 is separated into N separate substreams SSli2 ......, N. 接着,对应的D/A转换器组206将该N个独立的子码流SS1, 2......,N转换成N个模 Subsequently, corresponding to a D / A converter 206 groups the N independent sub stream SS1, 2 ......, N molded converted into N

拟子码流ASli2……,N。 Quasi substream ASli2 ......, N. 然后,本地振荡器214给混频器212提供信号,混频器212将该N个模拟子码流ASu......, ν上变频到合适的发射载波RF频率。 Then, a local oscillator 214 provides a signal to the mixer 212, the mixer 212 N analog substreams ASU ......, conversion to the appropriate RF carrier frequency of the transmitter ν. 接着,开关218将生成的N个RF信 Next, switch 218 generates N number of RF channels

号(如RFli2......,N)中的每个RF信号连接到所选择的N个发射天线单元的子集上。 Number (such as RFli2 ......, N) in each subset of the RF signal is connected to the N transmit antenna elements selected. 开关218 Switch 218

将该N个RF信号(如RFu......,N)连接到从MT个可用发射天线240中选出的N个发射天线, The N RF signals (e.g. RFU ......, N) is connected to the N transmit antennas selected from the MT 240 available transmit antennas,

从而获得一组N个输出信号。 Thereby obtaining a set of N output signals. 接着,对应的N个放大器234放大该N个输出信号,经放大的输出信号被选出的N个发射天线240发射。 Next, corresponding to the N amplifier 234 amplifies the output signal N, the amplified output signal is the selected N transmit antennas 240 transmit. 在另一实施例中,放大器234位于开关218之前。 In another embodiment, amplifier 234 before switch 218 is located. 这种配置下,仅需要N个放大器而不是MT个;而如果该MT个发射天线中每个天线配置一个放大器,就需要MT个放大器。 In this configuration, only N amplifiers instead of a MT; MT if the transmit antennas of each antenna configuration of an amplifier, it is necessary MT amplifiers. 选择N个天线是为了最小化接收器的输出信号的BER。 Selecting the N antennas to minimize the BER of the receiver output signal.

[0055] 参考图2B,发射器210发射的N个RF信号被设置在接收器250上的MR个接收天 [0055] Referring to Figure 2B, the transmitter transmits 210 N th RF signal is set on the receiver of the MR receiving antennas 250

12线260接收。 260 receives 12 lines. 该MR个接收信号中每个接收信号都被对应的低噪放大器(LNA) 264放大,接着,开关276将N个接收信号的子集连接到N个RF链路以形成N个RF信号,该N个RF信号通过对应的N个滤波器280。 The received MR signals are each received signal corresponding to the low noise amplifier (LNA) 264 amplifies, and then, the switch 276 is connected to a subset of N received signals to N RF links to form the N RF signals, which N RF signals through the corresponding N filters 280. 在另一个实施例中,低噪放大器264可位于开关276之后, 这样,使用的LNA的总数是N而不是MR ;如果该MR个接收天线中每个接收天线都设置一个LNA,则需要MR个LNA。 In another embodiment, a low noise amplifier 264 after the switch 276 may be positioned such that the total number of LNA is used instead of N MR; if the MR receive antennas for each receive antenna are provided a LNA, the MR is required LNA. 接着,使用N个混频器282将生成的N个过虑信号下变频到基带, 其中,本地振荡器284向每个混频器提供载波信号。 Next, converted to baseband signals misplaced next N N mixers 282 generated, wherein the local oscillator 284 provides a carrier signal to each mixer. 在图2B的实施例中,虽然接收器250 是以零差接收器实现的,但接收器250也能够以外差接收器实现,所述外差接收器以中频(IF)频率为特征。 In the embodiment of FIG. 2B, although the receiver 250 is a homodyne receiver implementation, but the receiver 250 can be implemented outside the heterodyne receiver, the heterodyne receiver for intermediate frequency (IF) frequency characteristics. (实际上,根据本发明一些方面的一些任何实施例都可以结合零差配置或外差配置)。 (Indeed, any of the embodiments according to some aspects of this invention may be combined or arranged heterodyne homodyne configuration). 对应的一组N个A/D转换器286将混频器282产生的N个基带信号转换成数字信号。 A corresponding set of N A / D converter 286 of the mixer 282 generates N baseband signals into a digital signal. 数字信号处理器288进一步处理该N个数字信号以形成N个空间复用的输出信号SS' ......,N,该N个空间复用输出信号SS' ......,,是N个独立子码流SSli2……』的估算。 The digital signal processor 288 for further processing of the N digital signals to form an output signal of the SS N spatial multiplexing '......, N, the N spatially multiplexed output signal SS' ......, It is N independent sub-stream estimates SSli2 ...... "in.

接着,多路复用器292对该N个输出信号SS' u......,,进行多路复用以产生输出信号S', Then, the multiplexer 292 of the N output signals SS 'u ...... ,, multiplexing to generate an output signal S',

S'是输入信号S的估算。 S 'is the input signal S is estimated.

[0056] 在本发明一些方面的一些实施例中,在发射端增加基带加权和组合(如“预编码”)方案,与下述的天线选择方法结合使用。 [0056] In some aspects of some embodiments of the present invention, at the transmitting end increases baseband weighting and combining (such as "precoding") scheme, in conjunction with antenna selection method described below. 这种情况下,DSP模块设置于解复用器202和D/A转换器206之间,这样N个独立子码流SS1>2……,ν被复数因子加权和被组合以形成一组N 个输出信号。 In this case, DSP blocks, a demultiplexer 202 and provided to the D / A converter 206 between, so that N independent sub stream SS1> 2 ......, ν complex factor is weighted and combined to form a group N output signals. 接着,对应的一组D/A转换器206将该N个输出信号转换成模拟信号ASli2……,N。 Subsequently, a corresponding group of D / A converter 206 converts the N output signals into an analog signal ASli2 ......, N.

[0057] 在本发明一些方面的实施例中,可以结合使用典型的天线选择方法,在发射端增加时空编码。 [0057] In some aspects of embodiments of the present invention may be used in conjunction with typical antenna selection method, increasing the space-time coding at the transmitting end. 这种情况下,用DSP模块取代解复用器202,其在空间和时间域内处理输入信号S以形成一组N个输出信号。 In this case, the DSP module replaces a demultiplexer 202, which is processed in space and time domain input signal S to form a set of N output signals. 接着,对应的一组D/A转换器206将该N个输出信号转换成模拟信号ASu……,N。 Subsequently, a corresponding group of D / A converter 206 converts the N output signals into an analog signal ASu ......, N. 常用的两种时空技术是:1)在N个输出信号中的一个或多个输出信号中引入时延(或相当于相位偏移);2)使用发射分集技术,该技术在((IEEE Journal on Selected Areasin Communications)) 1998 年10 月第8 其月第16 卷1451-1458 M, SM Alamouti Simple transmit diversity technique for wirelesscommunications"中有相关阐述。本发明全文参考了该论文。 Two commonly used techniques are hourly space: 1) one of the N output signals or more output signals introduced delay (or phase shift equivalent); 2) using a transmit diversity technique in ((IEEE Journal on Selected Areasin Communications)) October 1998, volume 8 of its May 16 1451-1458 M, SM Alamouti Simple transmit diversity technique for wirelesscommunications "set forth in the relevant present invention with reference to the entirety of the paper.

[0058] 例如,时空编码技术可适用于SC MIMO系统和/或为获得分集增益而设计的系统。 [0058] For example, space-time coding technique can be applied to SC MIMO system and / or for obtaining diversity gain of the system is designed. 预编码技术适用于基于SC或基于空间复用的MIMO系统或为获得数据速率和分集增益两者而设计的系统。 Precoding techniques are applicable to systems based on the SC-based or spatial multiplexing MIMO system to achieve data rates or both diversity gain and sub-design.

[0059] 三、基于最小误码率在RF频段进行 [0059] Third, based on the minimum error rate in the RF band

[0060] 信道自适应天线选择的方法和/或系统 [0060] The adaptive antenna selection method of the channel and / or system

[0061] A、概述 [0061] A, Overview

[0062] 根据本发明一些方面的一些实施例涉及在多天线通信系统中基于最小化误码率进行信道-自适应选择天线的方法和/或信道_自适应天线选择系统。 [0062] relates to a channel based on minimizing the error rate in a multiple antenna communication system in accordance with some embodiments according to some aspects of the present invention - an adaptive antenna selection method and / or channel selection _ adaptive antenna system. 例如,根据本发明一些方面的一些实施例,在多天线的通信系统中,选择天线单元的子集来发射和/或接收信号,以使误码率最小化。 For example, some embodiments according to some aspects of the present invention, in the communication system, multiple antennas, selecting a subset of antenna elements to transmit and / or receive signals, so that the bit error rate is minimized. 例如,根据本发明一些方面的一些实施例,在多天线的通信系统中, 选择天线单元的子集来发射和/或接收信号,以便当一个或多个适用通信信道存在变化的情况下,使误码率在整个时间段最小化。 For example, some embodiments according to some aspects of the present invention, in the communication system, multiple antennas, selecting a subset of antenna elements to transmit and / or receive signals, so that in the case where there is a change in one or more suitable communication channels, so that throughout the period of the bit error rate is minimized. 当使用多个天线来发射时,可以使用根据本发明一些方面的一些实施例来选择发射器的天线。 When multiple transmit antennas may be used to select the transmitter in accordance with some embodiments according to some aspects of the present invention is an antenna. 当使用多个天线来接收时,可以使用根据本发 When a plurality of receiving antennas, may be used according to the invention

13明一些方面的一些实施例来选择接收器的天线。 Some selected receiver antenna 13 of the embodiment according to some aspects described.

[0063] 例如,根据本发明一些方面的一些实施例适用于:(i)在称为单信道系统(如没采用空间复用的系统)中使用多个天线的接收器;(ii)在单信道系统中使用多个天线的发射器;和(iii)在空间复用或单信道的MIMO系统中发射器和/或接收器使用的RF链路少于发射和/或接收天线的系统。 [0063] For example, in accordance with some embodiments according to some aspects of the present invention is applicable to: (i) using a plurality of antennas in a receiver called single-channel system (e.g., no system employing spatial multiplexing) in; (ii) in a single channel system using a plurality of transmitter antennas; and (iii) the spatial multiplexing channels or a single RF link MIMO system transmitter and / or receiver use less transmit and / or receive antennas.

[0064] 以下将参考图3至图7,在以下的典型范围中对本发明一些方面的一些实施例进行阐述:1)具有空间复用的MIMO系统,其中发射器和接收器使用的RF链路的数目小于发射器/接收器天线的数目;2)不具有空间复用的单信道MIMO系统,其中发射器和接收器使用的RF链路的数目小于发射器/接收器天线的数目的;和3)不具有空间复用的单信道SIMO系统,其中包括使用多个天线单元的接收器。 [0064] below with reference to FIGS. 3 to 7, carried out in the following typical ranges for some embodiments according to some aspects of the present invention describes: 1) MIMO system with spatial multiplexing, wherein the RF link transmitter and receiver use number is less than the transmitter number / receiver antennas; 2) does not have a single channel MIMO system, spatial multiplexing, wherein the number of RF chains of the transmitter and the receiver used is less than the number of transmitter / receiver antenna; and 3) do not have a single channel space multiplexing SIMO system, including a receiver using a plurality of antenna elements. 根据本发明一些方面的一些实施例还可用于不具有空间复用的单信道(SC)多入单出(MISO)系统,其中发射器使用多个天线单元。 According to some embodiments according to some aspects of the present invention can be used with a single channel without spatial multiplexing (SC) multiple-input single-output (MISO) system, wherein the transmitter uses a plurality of antenna elements.

[0065] 作为示例,下面的实施例是对使用正交频分复用调制(OFDM)(如遵循802. I-Ia WLAN标准)的系统或基于直接序列扩频(DS-SS)(如遵循WCDMA标准)的系统进行阐述的。 [0065] As an example, the following examples are the use of an orthogonal frequency division multiplex modulator (the OFDM) (such as compliance 802. I-Ia WLAN standard) system or based on direct sequence spread spectrum (DS-SS) (as follow WCDMA standard) the system set forth. 根据本发明一些方面的一些实施例,通过结合时空Rake接收器,DS-SS接收器的处理容量能够扩展到空间域,时空Rake (耙式)接收器能有效地组合对应于时间域和空间域两者的多径“抽头(taps)”。 According to some embodiments according to some aspects of the present invention, by combining the temporal Rake receiver, the processing capacity of the DS-SS receiver can be extended to the spatial domain, temporal Rake (Rake) receiver effective combination corresponds to the time and spatial domain both multipath "tap (tAPS)." 这种扩展表明这里所述的技术能推广到实际中在频率选择性衰落环境下的任何使用时间和/或频率域处理的系统。 This expansion shows that the techniques described herein can be extended to any practical time at a frequency selective fading environment and / or frequency domain processing systems.

[0066] B、SM-MIM0-0FDM系统中的天线选择 [0066] B, SM-MIM0-0FDM antenna selection system

[0067] 图3所示的是根据本发明一些方面的一些实施例使用天线选择的SM-MIM00FDM系统300的发射器和接收器结构。 [0067] FIG. 3 is a SM-MIM00FDM system transmitter and a receiver using the antenna structure 300 in accordance with some embodiments selected according to some aspects of the present invention is shown. 如图所示,两个独立的子码流304(如空间复用信号)OFDM 调制在Nt个频率副载波上,并通过两个RF链路308,为发射做准备。 As illustrated, two separate sub-streams 304 (e.g., spatial multiplexing signal) modulated onto the OFDM sub-carrier frequency Nt, and by two RF link 308, to emit preparation. 在这点上,开关模块312从4个发射天线单元316中选择两个天线单元并将该两个天线单元连接到两个RF链路308上。 In this regard, the switch module 312 selects two antenna elements and the two antenna elements connected to the two RF links 308 from the four transmit antenna elements 316. 因为发射器302的4个天线单元316只有两个被选择,所以RF发射链路的数目方便地减少到空间复用信号的数目。 4 since the transmitter 302 antenna unit 316 is selected only two, the number of RF transmit chain conveniently reduced to the number of spatially multiplexed signals.

[0068] 在图3所示的实施例中,在任何给定时刻,开关模块312都包含识别将用于发射的天线单元对316的信息。 [0068] In the embodiment illustrated in FIG. 3, at any given time, the switch module 312 contain identifying information of the antenna unit 316 for transmission. 开关模块312本身可以根据基于最小BER标准的运算法则计算该信息(如在信道318是可互换(reciprocal)的情况下)。 The switching module 312 may be information (e.g., in the case of channel 318 are interchangeable (reciprocal)) is calculated based on the minimum BER itself standard algorithms. 在另一个实施例中,模块312可通过反馈路径(图中未示出)接收来自接收器330的信息。 In another embodiment, the module 312 via a feedback path (not shown) receives information from the receiver 330. 在信道318不是可互换(reciprocal)的情况下,例如在限制干扰环境下可使用后一种方法。 In the case where the channel 318 is not interchangeable (reciprocal), the latter method may be used for example to limit the interference environment.

[0069] 接收器330中,开关模块334从4个天线单元338中选择两个天线单元用于接收发射器302发射的入射信号。 [0069] The receiver 330, the switch module 334 selected from the four antenna elements 338, two antenna elements for receiving an incident signal transmitted by the transmitter 302. 开关模块334将选择的2个天线338连接到两个RF链路342, 该两个RR链路342用于将该两个信号转换成数字域以进行基带处理。 Switch module 334 will select two antennas 338 connected to the two RF links 342, 342 of the two RR link for converting the two signals to digital baseband processing domain. 接着,在每个调(at each tone)上将加权矩阵346应用到所接收的信号上以分离和还原每一个被发射的空间复用信号。 Then, each adjustment (at each tone) signal on the weighting matrix 346 is applied to the received transmitted to each of the separation space and restore the multiplexed signal.

[0070] 在典型的实施例中,配置开关模块334使其能够通过执行基于最小BER标准的运算法则自己计算出应该选择天线单元338中的哪对天线单元来接收。 [0070] In an exemplary embodiment, the switch module 334 configured so that it can be calculated by performing a BER based on the minimum standards that should own algorithm selection antenna unit 338 which is received in the antenna unit. 当信道不是可互换情况下,可以对模块334进行进一步配置,以计算出发射器302应该使用哪一对天线单元316, 并将该信息提供给发射器302。 When the channel is not interchangeable, the module 334 may be further configured to calculate a transmitter antenna 302 should be used which unit 316, and supplies the information to the transmitter 302. 下面结合图4A和图4B对由开关模块312、334执行的两种可能的天线选择运算法则进行描述。 Below in connection with FIGS. 4A and 4B of the two possible antenna switch module 312,334 by the selection algorithm performed will be described.

14[0071] 转到图4A中,图4A所示为天线选择运算法则400的流程图,其中,编码/调制模式(如数据速率或吞吐量)是固定或适应于长期原则(long-termbasis)(如适用于SNR的大范围变化)。 14 [0071] to FIG. 4A, a flowchart shown in FIG selection algorithm 400 is an antenna, wherein the coding / modulation scheme (e.g., data rate or throughput) fixed or adapted to the principle of long-term (long-termbasis) (if applicable to a wide range of SNR variation). 天线选择运算法则的任务是在给定模式下为每个数据分组确定发射器302 应该使用天线单元316中的哪对天线单元和确定发射器330应该使用天线单元338中的哪对天线单元。 Antenna selection algorithm is the task of the given pattern determination packet transmitter 302 should be used for each data in which the antenna unit 316 and the antenna unit 330 determines the transmission antenna unit 338 should be used in which the antenna element. 例如,该选择过程中,假定信道318是准固定的(例如,信道318在数据分组发射期间内是不变的,在两个相邻的数据分组间是独立地变化的)。 For example, the selection process, a channel 318 is assumed to be quasi-stationary (e.g., channel 318 in the packet transmitted during data is unchanged, between two adjacent data packets is changed independently). 虽然信道318表现出一些频率选择性,天线选择对于整个频率带宽来说是共通的。 Although the channel 318 shows some frequency selectivity, the antenna selection for the entire frequency bandwidth is common.

[0072] 参考图4A,当发射器302刚启动(步骤401)且信道318的状态尚未知时,使用天线单元316中默认的一组两个天线单元的子集发射无线信号。 [0072] Referring to Figure 4A, when the transmitter 302 is just started (step 401) and the state of the channel 318 is not known, using the antenna unit 316 in a default set of two subsets of antenna elements transmit wireless signals. 类似地,接收器330使用天线单元338中默认的一组两个天线单元的子集以获得同步。 Similarly, the receiver unit 338 using the antenna 330 in the default subset of a set of two antenna elements to obtain synchronization. 接着,获得信道状态信息(CSI) (步骤402)。 Next, obtain channel state information (the CSI) (step 402). 在根据本发明一些方面的一些实施例中,获取CSI的操作由接收器330执行。 In some embodiments according to some aspects of the present invention, in accordance with the acquired CSI 330 operations performed by the receiver. 由已知符号组成的训练序列从发射器302发送到接收器330。 Training sequence of known symbols is transmitted from the transmitter 302 to the receiver 330. 接收器330中,基于所接收的信号和已知的符号序列估算信道318。 Receiver 330, and based on the known signal of the received symbol sequence estimated channel 318. 每当信道318改变,如在每个数据分组实现时,都进行该估算操作。 318 changes each time the channel, as each data packet is achieved, both for the estimation operation. 为了成功执行该选择方法,应该在整个频率带宽内进行完全的信道矩阵估算(如,对从发射器302的所有天线单元316到接收器330的所有天线单元338在所有调上(across all tones)进行信道路径增益估算)。 For the selection method is successful, it should complete channel matrix estimation (e.g., over the entire frequency bandwidth, all tones for the transmitter for all antenna elements 302 316 to the receiver all the antenna unit 330 is 338 in all of the toner (across) channel path gain estimation). JJ Van de Beek等人在IEEE第45届"Vehicular TechnologyConference,,1995 年7 月25-28 日第2 卷第815-819 页的论文"On ChannelEstimation in OFDM Systems,,禾口A. N· Mody & GL Stuber $ IEEE Globecom2001 年第一卷第509-513 页的论文"Synchronization for ΜΙΜΟ OFDM Systems”中阐述了适用于ΜΙΜΟ系统的基于训练序列的信道估算技术。 JJ Van de Beek et al., IEEE 45th "Vehicular TechnologyConference ,, paper July 1995 25-28 Volume 2 pages 815-819 of" On ChannelEstimation in OFDM Systems ,, Hekou A. N · Mody & GL Stuber $ IEEE papers in the first volume of 509-513 Globecom2001 page "Synchronization for ΜΙΜΟ OFDM systems" set forth in the applicable system for ΜΙΜΟ estimates based on training sequence channel technology. 本发明全文参考了这些论文。 The present invention with reference to the full text of these papers.

[0073] 再参考图4,通过执行链路自适应运算法则获取模式信息(步骤404)。 [0073] Referring again to FIG 4, the information acquisition mode (step 404) by performing an adaptive algorithm link. 在图4Α所示的实施例中,模式变化出现缓慢。 In the embodiment illustrated in FIG 4Α, the mode change occurs slowly. 因此能够使用链路自适应运算法则来确定从长期平均SNR来看,哪种可能的候选模式是最适合使用的。 It is possible to use an adaptive algorithm to determine the link long term average SNR, which is the most likely candidate for use in the model. 在给定模式选择标准下(如,最大的数据速率和最小的发射功率),从长期变动的信道/SNR条件来看,使用链路自适应运算标准能够确保使用的是最有效的模式。 In the selection criteria given pattern (e.g., the maximum data rate and a minimum transmit power), the long term changes in the channel / SNR conditions of view, the use of the link adaptation operation using the criteria ensure the most efficient mode. 能够用于频率选择性MIMO系统中的典型的链路自适应运算法则在IEEE通信杂志2002年6月第40卷第6号第108-115页S. Catreux等人的论文"Adaptive Modulation and ΜΙΜΟ Coding for Broadband Wireless DataNetworks,,有阐述,本发明全面参考了该论文。通常,模式选择独立于选择发射器/接收器天线单元的方法。模式的选择可排外地基于长期的SNR统计。因此,模式变化的速率比天线选择的速率要慢很多。换句话说,选择运算法则可能对应于每个数据分组实现选择新的天线子集,而模式变化则作为长期SNR变化的函数。 Can be used for link adaptation algorithms typical frequency-selective MIMO system in June 2002, Vol. 40 No. 6, pages 108-115 on S. Catreux et al., IEEE Communications Magazine paper "Adaptive Modulation and ΜΙΜΟ Coding for Broadband Wireless DataNetworks ,, there are illustrated, the present invention with reference to the overall paper. typically, the mode selection is independent of the selection method of the transmitter / receiver antenna elements. mode may be selected exclusively based on long-term SNR statistics. Thus, the mode change rate than the rate of antenna selection is much slower. in other words, the algorithm may be selected corresponding to each data packet to achieve a new antenna subset selected, and the mode change function is as a long-term change in SNR.

[0074] 步骤406、408和410以循环方式重复执行,直到所有可能的发射/接收天线单元的子集的组合被估算完(步骤411)。 [0074] Step 406, 408 and 410 are repeatedly performed in a cyclic manner, until all possible transmit / receive combinations of the subset of antenna elements is estimated finished (step 411). 例如,考虑图3所示类型的MIM0-0FDM系统(如,配置有4个发射天线单元316和4个接收天线单元338),完整的信道矩阵可以在频率域内调k(tone k)上用4X4的矩阵表示,该4X4矩阵用Hk表示。 For example, consider the system shown in FIG. 3 MIM0-0FDM type (e.g., configured with four transmit antennas and four receive unit 316 antenna unit 338), the full channel matrix can be used in the frequency domain modulation 4X4 k (tone k) matrix representation, represented by the 4X4 matrix Hk. 在每一端都选择了两个天线的子集后,子信道矩阵的尺寸减小为2X2的矩阵,用^fc表示。 After each end of the selected subset of two antennas, the matrix is ​​reduced to the size of the subchannels 2X2 matrix, denoted by ^ fc. 从总共4个天线单元中选择2 From a total of four antenna elements 2

(4) (4)

个单元的组合有二6种可能的选法。 There are two units of a combination of six possible election law. 因为天线选择是应用到发射器302和接收器330两 Since antenna selection is applied to the transmitter 302 and two receivers 330

者中的,所以的可能的组合的总数是36。 The total number of persons, it is possible 36 combinations. 通常,在MXM的MIMO系统的尺寸减小到nXn的MIMO系统(M>n)的情况下,从M个可能的天线单元中选择η个天线单元的可能组合 In general, when the size is decreased MXM MIMO system to a MIMO system nXn (M> n) from the M antenna elements may be selected η possible combinations of antenna elements

Figure CN1868147BD00161

W ~^种。 W ~ ^ species. 继身寸翻馳社者剛預缝樹,~白勺赌白勺船白勺总、般 Following the body inch by just turning Chi Club pre-seam tree - white spoon white spoon gambling boat total white spoon, like

Figure CN1868147BD00162

—~ 。 - ~. 这对应于包括步骤406、408和410的循环重复的次数。 This corresponds to steps 406, 408 and 410 comprises a loop of the number of repetitions. 该重复过程可以串 This process may be repeated string

Figure CN1868147BD00163

行方式进行(如重新使用共用的处理资源)或以并行方式进行(如花费额外的处理资源)。 Line manner (e.g., re-using common processing resources), or in a parallel manner (e.g., to spend additional processing resources). 在典型的实施例中,能够同时处理所有的可能的天线组合,其中每个可能的天线组合使用独立的处理资源。 In an exemplary embodiment, it is possible to process all the possible combinations of antennas, wherein each antenna combination may separate processing resources.

[0075] 包括步骤406、408和410的循环的每次重复都影响一个天线子系统的处理。 [0075] 406, 408 and 410 comprises a loop of steps is repeated every one antenna affect processing subsystem. 首先, 为期望子系统获取所有调(tone)上(k= 1,……,Nt)的2X 2矩阵应步骤406)。 First, to obtain desired subsystems on all tone (tone) (k = 1, ......, Nt) of the matrix should 2X 2 step 406). 接着, 在每个调k上和为每个被发射的空间复用信号计算处理后的信号与干扰及噪声比(SINR) (步骤408)。 Next, on each tone k and the complex computing signal to interference and noise ratio after treatment (SINR) signal (step 408) is transmitted to each space. 基于发射器302和/或接收器330使用的信号处理技术(如,最大比例合成(MRC)、最小均方差(MMSE)、本征波束成型和最大似然(ML)),常常用闭型解决方法求解SINR。 Based on signal processing techniques transmitter 302 and / or receiver 330 for use (e.g., maximum ratio synthesis (the MRC), minimum mean square error (the MMSE), eigen beamforming, and maximum likelihood (ML)), often with a closed-type solution method to solve SINR. 例如,如果发射器302没有执行空间处理且接收器330使用MMSE,那么SINR可如下确定: For example, if the transmitter 302 does not perform spatial processing, and using the MMSE receiver 330, then the SINR may be determined as follows:

Figure CN1868147BD00164

[0076] 计算Bk=HfHk +^7Z2其中,/2 = ,σ 2与σ s2分别表示噪声和信号功率,k [0076] Calculation Bk = HfHk + ^ 7Z2 wherein, / 2 =, σ 2 and σ s2 represent noise and signal power, k

Figure CN1868147BD00165

[0077]计算Ct ,对每一个k=l,……,Nt,Ck是NXl 的矢量(步骤408-2)。 [0077] calculating Ct, for each k = l, ......, Nt, Ck is the vector of NXl (step 408-2).

Figure CN1868147BD00166

[0078]计算 SINRk =^tC1i -1,对每一个k = 1,……,Nt, SINRk 是NX 1 的矢量 [0078] Calculation SINRk = ^ tC1i -1, one for each k = 1, ......, Nt, SINRk is NX 1 vector

σ σ

[0079] (步骤408-3)。 [0079] (Step 408-3).

[0080] 步骤410中,考虑到当前模式,SINR信息被转换成BER信息(如步骤404)。 In [0080] Step 410, taking into account the current mode, the SINR information is converted into the BER information (step 404). 因为BER可能是信道318和所使用的编码/调制及天线组合技术的复杂函数,所以采用BER的近似表达式。 Because the BER might be complex function of the channel 318 used for coding and / antenna combination and modulation techniques, the use of approximate expression BER. 该近似表达式也可以是信道318和适用的编码/调制及天线组合技术的函数。 The approximate expression may also be a function of the channel 318 and the applicable coding / modulation techniques and antenna combination. 发射子码流i的数据分组(例如,如果使用了编码,Viterbi解码器的输出)上的BER可表示为一组SINRk、K = 1,……,Nt的非线性的未知函数f,如: I data packet sub-stream transmission (e.g., if the coding, the output of the Viterbi decoder) on the BER can be expressed as a set of SINRk, K = 1, ......, Nt unknown nonlinear function F, such as:

[0081] ^MK1 二咖舰九ίθ\ k 二i”.”Nt [0081] ^ MK1 two coffee ship nine ίθ \ k two i "." Nt

[0082] 接着,用一些已知函数近似表示函数f。 [0082] Next, some known function approximation function representing f. 具体地,用信道的平均误码率近似表示输出BER,如: Specifically, the average bit error rate for the channel represents approximately the BER output, such as:

Figure CN1868147BD00167

[0083] [0083]

Figure CN1868147BD00168

[0084] 其中BER1/是空间复用子码流i在调k上给定SINR下的误码率。 [0084] wherein BER1 / spatial multiplexing sub-stream i to k on a given modulation bit error rate under SINR. 在另一个实施例中,BERk是在调k上给定信噪比(SNR)下的误码率。 In another embodiment, BERk k is the modulation error rate under a given signal to noise ratio (SNR). 当BERk是在信道时间取样k上给定SINR下的误码率时,也可在时间域内取平均值。 When the channel is BERk sampling time k to the error rate under the given SINR, can be averaged in the time domain. BERk可以是对应于给定信号成分(如信道调或控制延迟)的误码率。 BERk may correspond to a given signal component (e.g., control channel modulation or delay) of the bit error rate.

[0085] 另外,也可以用一些简单的闭型函数近似表示BERk。 [0085] Further, use may be simple closed form function approximated BERk. 通过仿真发现能够模拟802. I-Ia的模式1(如BPSK、Rl/2)下与SINR或SNR (在一些实施例中,可忽略BER标准化BER的行为,例(2) 802. I-Ia can be simulated by the emulation discovery mode 1 (e.g., BPSK, Rl / 2) under the SINR or SNR (in some embodiments, may be standardized negligible BER BER behavior of Example (2)

因子Ι/Nt,因为该因子不影响天线选择)相关的平均误码率如:通过 Factor Ι / Nt, since this factor does not affect the antenna selection) related to the average error rate, such as: by

[0086] [0086]

Figure CN1868147BD00171

[0087] 可用-tanh (SINRk)近似表示信号成分k的BER。 [0087] Available -tanh (SINRk) is approximated BER signal component k.

[0088] 函数tanh不总是能够充分近似表示BER,特别是对于不同的调制技术。 [0088] tanh function can not always be sufficiently approximated BER, especially for different modulation techniques. 当使用特定的技术时,可用以下的函数更好地近似表示BER : When a particular technology, using the following function better approximated BER:

[0089] 1)AWGN信道下未编码的BPSK调制的BER是(例如参见JG Proakis,Digital Communications, 3rdED. McGraw-Hill Series,1995): [0089] 1) in AWGN channel uncoded BPSK modulation is BER (e.g. see JG Proakis, Digital Communications, 3rdED McGraw-Hill Series, 1995).:

[0090] [0090]

Figure CN1868147BD00172

[0091]可用下面的函数(与y = "tanh (χ)比较)适度地近似表示函数erfc的形式 [0091] The following functions are available (and y = "tanh (χ) Comparative) reasonably approximated in the form of a function erfc

[0092] [0092]

Figure CN1868147BD00173

[0093] 2) AWGN信道下未编码的QPSK调制的BER是(例如参见JG Proakis,Digital Communications, 3rdED. McGraw-Hill Series,1995) [0093] 2) AWGN channel uncoded BER is QPSK modulation (see for example JG Proakis, Digital Communications, 3rdED. McGraw-Hill Series, 1995)

[0094] [0094]

Figure CN1868147BD00174

[0095]可用下面的函数来比1= -tanh (χ)更好地近似表示的形式 [0095] The following functions are available than 1 = -tanh form ([chi]) represents a good approximation of

[0096] [0096]

Figure CN1868147BD00175

[0097]3)AWGN信道下未编码的16QAM调制的BER可从给定的符号误码率导出,例如从JG Proakis, Digital Communications, 3rdED. McGraw-Hill Series, 1995 中给定的符号误码率导出: [0097] 3) AWGN channel uncoded BER 16QAM modulation may be derived from a given symbol error rate, for example, from JG Proakis, Digital Communications, 3rdED. McGraw-Hill Series, 1995. given symbol error rate export:

[0098] [0098]

Figure CN1868147BD00176

[0099] 一个适当的拟合函数是y = -(l-e_°2x)。 [0099] a proper fit function is y = - (l-e_ ° 2x).

[0100] 4)AffGN信道下未编码的64QAM调制的BER可从给定的符号误码率导出,例如从JG Proakis, Digital Communications, 3rdED. McGraw-Hill Series, 1995 中给定的符号误码率导出: [0100] 4) the AffGN channel uncoded BER 64QAM modulation may be derived from a given symbol error rate, for example, from JG Proakis, Digital Communications, 3rdED. McGraw-Hill Series, 1995. given symbol error rate export:

[0101] [0101]

Figure CN1868147BD00177

[0102] 一个适当的拟合函数是;;= -(l — e-。3仏)。 [0102] is a proper fit function ;; = - (l - e-.3 Fo).

[0103] 可以理解,任何能够合理地模拟BER与SINR关系的拟合函数都可用在等式(2) 中。 [0103] It will be appreciated, any simulation BER can reasonably fit function of the relationship between SINR are used in the equation (2). 该合适的拟合函数的数目不限于上面列举的例子。 Suitable number of the fit function is not limited to the examples listed above.

[0104] 如上所示,步骤406至步骤410重复执行,直到考虑完所有可能的天线子集的组合(步骤411)。 As shown in [0104] as described above, step 406 to step 410 is repeatedly executed until completion of considering all possible combinations of the subset of antennas (step 411). 重复过程的结果是,获得了所有 Repeat the process result is obtained all

Figure CN1868147BD00181

种可能的天线组 Possible antenna group

n\{M-ri)\ \n\{Mn)\) n \ {M-ri) \ \ n \ {Mn) \)

合的BER值的一组N个估算(每个空间复用信号对应于一个估算)。 A set of N values ​​estimated BER bonded (spatial multiplexed signals each corresponding to one estimate). 接着,后面就是选择能够将该组BER的均值(mean)、该组BER的最大值(max)或该组BER的最小值(min)最小化的的天线子集(步骤412)。 Next, the back is able to select the set BER mean (Mean), the maximum value of the set BER (max) or the minimum value of the set BER (min) minimizes antenna subset (step 412).

[0105] [0105]

Figure CN1868147BD00182

[0106] [0106]

Figure CN1868147BD00183

[0107] [0107]

Figure CN1868147BD00184

[0108] 图4B是天线选择运算法则500的流程图,其中,响应信道318的相应变化,编码/ 调制模式改变的次数与每数据分组实现的次数相同。 [0108] FIG. 4B is a flowchart illustrating antenna selection algorithm 500, wherein, in response to a corresponding change in the channel 318, the same number of coding / modulation mode change with the number of packets per data implemented. 在该实施例中,编码/调制模式调整的频率与天线选择实现的频率相同。 In this embodiment, the encoding / modulation mode to adjust the frequency of the same frequency antenna selection achieved.

[0109] 参考图4B,步骤501和502分别与步骤401和402相似。 [0109] Referring to Figure 4B, step 501, and 502 are similar to steps 402 and 401. 如图所示,步骤504到步骤510包括一个循环,该循环重复执行直到所有的可能的天线子集的组合已经估算完毕。 As illustrated, step 510 includes the step 504 to a loop that is repeatedly executed until all the possible combinations of subsets has been estimated that the antenna is completed.

ί η, \2 ί η, \ 2

(在链路的两 (Link two

该循环重复的次数等于—(在链路的一端进行选择)或 This cycle was repeated a number of times equal to - (chosen at the end of the link), or

Figure CN1868147BD00185

端都进行选择)。 End all be selected). 有关这一点,步骤504和506分别与步骤406和408相似。 In this regard, steps 504 and 506 are similar to steps 406 and 408. 基于对所有调上的瞬时SINR的了解,链路适应模块在给定模式选择标准下(如最大的数据速率和最小的发射功率)为每个空间复用信号确定最有效的模式(步骤508)。 Based on knowledge of the instantaneous SINR of all tone, link adaptation mode selection modules at a given standard (e.g., the maximum data rate and a minimum transmit power) for each spatial multiplexing determine the most efficient mode (step 508) signal . 该步骤与步骤404相似, 不同的是模式确定是基于瞬时SNR(或SINR)统计而不是基于长期的SNR(或SINR)统计。 This step is similar to step 404, except that the mode determination is based on the instantaneous SNR (or SINR) rather than on long-term statistical SNR (or SINR) statistics. 因此,不同的天线子集的组合可能获得不同的模式确定。 Thus, the combination of different antenna subsets may obtain different mode determination. 最后,在给定的瞬时SINR和模式 Finally, in a given mode and the instantaneous SINR

信· letter·

息下,步骤510以步骤410中所述的方式计算或确定对应的BERc Under interest, step 510 to step 410 in the manner corresponding to the calculated or determined BERc

[0110] 再一次,执行步骤504至步骤510直到所有的可能的天线组合已经考虑完毕(步 [0110] Again, steps 504 through step 510 until all possible antenna combinations have been considered complete (step

骤511)。 Step 511). 一旦重复执行完毕后,获得所有(或 Once completed is repeatedly performed to obtain all (or

/ /

M!])种可能的天线组合 M!]) Possible antenna combinations

Figure CN1868147BD00186

的BER值的一组N个估算(如每个空间复用信号对应一个估算)。 A set of N estimated BER value (e.g., each corresponding to a spatial multiplexing signal estimate). 选择运算法则500与运 Selection algorithm and transport 500

r ▽ r ▽

)种可能的天线组合无需使用相同 ) Possible combinations without the use of the same antenna

算法则400的不同之处在于~—~ (或 The algorithm 400 except that the ~ - ~ (or

η\{Μ-ή)\ η \ {Μ-ή) \

Ml Ml

n\(Mn)l n \ (Mn) l

的编码/调制模式。 Coding / modulation mode. 因此,选择哪一个天线子集不仅取决于BER的最小化,还取决于模式(如数据速率或吞吐量)。 Thus, the choice of which depends not only on a subset of antennas to minimize the BER, also depending on the mode (e.g., data rate or throughput). 按照选择运算法则500中的步骤512,在选择天线单元子集作出最终确定时,有以下几种典型选项: Follow the procedures in algorithm 500 selects 512, when selecting a subset of antenna elements to make a final determination, typically have the following options:

[0111]选项 1 [0111] Option 1

[0112] 1)将使用相同模式的天线子集的所有组合归组到公用存储池(common pool)。 All combinations of [0112] 1) will use the same antenna pattern subset grouping common storage pool (common pool).

[0113] 2)选择与最高模式(获得最大速据速率)对应的存储池(pool)。 [0113] 2) selecting the highest mode (maximum speed data rate) corresponding to the storage pool (pool). [0114] 3)在该存储池中,用与步骤412充分相似的方式选择将BER最小化的天线子集的组合。 [0114] 3) selecting a combination of the BER minimizes the subset of antennas in the storage pool, and in step 412 with substantially similar manner.

[0115]选项 2 [0115] Option 2

[0116] 不考虑每个组合使用的模式,用与步骤412充分相似的方式选择将BER最小化的天线子集的组合。 [0116] regardless of mode of use of each combination, 412 substantially similar manner as in the step of selecting a combination of the BER minimizes the subset of antennas.

[0117]选项 3 [0117] Option 3

[0118] 执行选项1和选项2的混合版,例如: [0118] Options 1 and performs mixing plate 2, for example:

[0119] 1)将使用相同模式的天线子集的所有组合归组到公用存储池。 All combinations of [0119] 1) will use the same antenna pattern subset grouping common storage pool.

[0120] 2)选择与X个最高模式(获得最大速据速率)对应的X个存储池,其中,X是整数,等于1或2或3,等。 [0120] 2) selecting the highest X mode (maximum speed data rate) corresponding to the X number of storage pools, wherein, X is an integer equal to 1 or 2 or 3, and the like.

[0121] 3)在这些存储池中,用与步骤412充分相似的方式选择将BER最小化的天线子集的组合。 [0121] 3) selecting a combination of the BER minimizes the subset of antennas in the storage pool, and in step 412 with substantially similar manner.

[0122] 图5所示为在噪声限制环境下的SM-MIM0-0FDM系统中采用典型的天线选择技术后,作为SNR函数的分组误码率(PER)的示意图。 [0122] FIG. 5 is a typical technique is selected in the SM-MIM0-0FDM antenna system in noise-limited environment, packet error rate as a function of SNR (PER) of FIG. 例如,可将图5的结果应用到以图3所示的示例性方式使用4个发射和接收天线的系统中。 For example, the results of Figure 5 may be applied to the system to the exemplary embodiment illustrated in Figure 3 uses four transmit and receive antennas. 结果仅反映了一些示例中1000字节大小的数据分组和固定的编码/调制模式的情况。 The results reflect only some examples, the case where the data packet size of 1000 bytes and a fixed encoding / modulation mode. 该结果也反映了可适用的发射器和接收器都结合了两个典型的RF链路。 The results also reflect the applicable transmitter and receiver are incorporated two typical RF link. 另外,图5的结果使用BPSK调制、编码率为1/2 (如802. Ila 的模式1)、信道模型特征为“信道A” (如50ns rms的延迟扩展、0. 5的天线相关性)和拟合函数是tanh。 Further, the results of Figure 5 uses BPSK modulation, coding rate is 1/2 (e.g., mode 1 802. Ila), wherein the channel model "Channel A" (such as a 50ns rms delay spread, the antenna 0.5 Correlation) and fitting function is tanh.

[0123] 图5中的曲线的图例如下: Curve in the legend [0123] FIG 5 is as follows:

[0124] 2X22SM-MIM0匪SE :该系统对应于使用2个发射天线和2个接收天线、有2个空间复用(SM)信号的SM-MIM0-0FDM系统。 [0124] 2X22SM-MIM0 bandit SE: This system corresponds to using two transmit antennas and two receiving antennas, there are two SM-MIM0-0FDM spatial multiplexing system (SM) signals. 因为天线的数目等于SM信号的数目,所以没有应用天线选择。 Because the number of antennas equal to the number of signal SM, there is no antenna selection application. 接收器中使用基带组合方案来分离2个子码流,如MMSE。 Baseband receiver combining scheme used to separate the two sub-streams, such as MMSE.

[0125] 4X42SM-MIM0 sel mcap MMSE :该系统对应于使用4个发射天线单元和4个接收天线单元、有2个空间复用(SM)信号的SM-MIM0-0FDM系统。 [0125] 4X42SM-MIM0 sel mcap MMSE: This system corresponds to units using four transmit antennas and four receive antenna elements, there are two SM-MIM0-0FDM spatial multiplexing system (SM) signals. 发射器和接收器上都应用常规的选择方法以根据最大容量标准在4个天线单元中选择2个天线单元的子集。 It is applied on the transmitter and receiver conventional selection methods to select a subset of two antenna elements in the antenna unit 4 according to the maximum capacity criteria. 接收器上选择天线子集后,MMSE被应用到基带中以分离2个子码流。 After selection on the receiver antenna subset, MMSE are applied to the baseband to separate the two sub-streams.

[0126] 2 X 42SM-MIM0 sel mber MMSE (bound):该系统对应于使用2个发射天线单元和4 个接收天线单元、有2个空间复用(SM)信号的SM-MIM0-0FDM系统。 [0126] 2 X 42SM-MIM0 sel mber MMSE (bound): This system corresponds to the use of two transmit antenna elements and receive antenna elements 4, there are two SM-MIM0-0FDM spatial multiplexing system (SM) signals. 仅在接收端上应用选择方法以根据最小BER标准在4个天线单元中选择2个天线单元的子集。 2 to select a subset of antenna elements in the antenna unit 4 in accordance with the minimum BER requirements at the receiving end application selection method. 这种情况下,没有使用拟全函数来近似表示BER。 In this case, not using the full intended function approximated BER. 作为替代,假定已经完全知道BER。 As an alternative, assumed to have been fully aware of the BER. 这种情况不容易实现, 但提供了通过使用本发明一些方面的一些实施例能达到的性能的范围。 This case is not easy to implement, but provides a range of performance by the use of some embodiments of the present invention, some aspects can be achieved.

[0127] 4X4 2SM-MIM0 sel mber MMSE(bound):该系统对应于使用4个发射天线单元和4个接收天线单元、有2个空间复用(SM)信号的SM-MIM0-0FDM系统。 [0127] 4X4 2SM-MIM0 sel mber MMSE (bound): This system corresponds to a unit using four transmit antennas and four receive antenna elements, there are two SM-MIM0-0FDM spatial multiplexing system (SM) signals. 在发射端和接收端上都应用选择方法以根据最小BER标准在4个天线单元中选择2个天线单元的子集。 On the transmitting and receiving ends are applied selection method to select two subsets of antenna elements in the antenna unit 4 in accordance with the minimum BER criteria. 这种情况下,没有使用拟合函数来近似表示BER。 In this case, without using the fit function approximated BER. 作为替代,假定已经完全知道BER。 As an alternative, assumed to have been fully aware of the BER. 这种情况不容易实现,但提供了通过使用本发明一些方面的一些实施例能达到的性能的范围。 This case is not easy to implement, but provides a range of performance by the use of some embodiments of the present invention, some aspects can be achieved.

[0128] 4X42SM-MIM0 sel mber MMSE (implementation tanh):该系统对应于使用4个发射天线单元和4个接收天线单元、有2个空间复用(SM)信号的SM-MIM0-0FDM系统。 [0128] 4X42SM-MIM0 sel mber MMSE (implementation tanh): This system corresponds to a unit using four transmit antennas and four receive antenna elements, there are two SM-MIM0-0FDM spatial multiplexing system (SM) signals. 在发 In the hair

19射端和接收端上都应用根据本发明一些实施例的选择方法,以根据最小BER标准在4个天线单元中选择2个天线单元的子集。 19 are applied on the exit side and receiving side selection method according to some embodiments of the present invention, to select a subset of two antenna elements in the antenna unit 4 in accordance with the minimum BER criteria. 使用tanh作为近似表示BER的拟合函数。 Tanh represents the BER as an approximation using a fitting function.

[0129] 图5的结果表明,相对于不使用天线选择的系统,所有的使用一些类型的天线选择的系统提供了增益,也表明了基于最小BER标准的天线选择比基于最大容量标准的天线选择能提供更大的增益。 Results [0129] FIG. 5 shows that, with respect to the system does not use the antenna selected, all use some type of antenna selection system provides gain, also it shows the selection based on minimum BER standard antenna than the antenna based on the maximum capacity criteria selection provide greater gain. 具体地,相对于不使用天线选择的系统,在发射器和接收器都应用了根据本发明的天线选择的系统在lOe-2的PER水平上获得7. 6dB的增益;相对于使用基于最大容量标准的天线选择的系统,在发射器和接收器都应用了根据本发明的天线选择的系统在lOe-2的PER水平上获得4. 2dB的增益。 In particular, with respect to the system does not use the selected antennas, the transmitter and the receiver are applied to obtain 7. 6dB gain at PER level lOe-2 antenna selection system according to the present invention; with respect to the maximum capacity based antenna selection standard system, the transmitter and the receiver are applied to obtain 4. 2dB gain at PER level lOe-2 antenna selection system according to the present invention. 能观察到,仅仅在接收器上应用根据本发明一些方面的一些实施例的选择方法获得的增益,小于在发射器和接收器都应用选择方法所获得的增益,但大于不使用选择方法的增益。 Observed, only applying a gain obtained according to the method of selecting some embodiments of some aspects of the present invention, at the receiver, is less than the gain in the selection method the transmitter and the receiver are applied obtained, but larger than without using the selected method of gain . 最后,根据本发明一些方面的一些实施例的系统的性能非常接近图5所示的理论上的性能范围。 Finally, performance of the system in accordance with some embodiments of some aspects of the present invention is very close to the theoretical performance range as shown in FIG.

[0130] C、SC-MIM0-0FDM系统的天线选择 [0130] C, SC-MIM0-0FDM antenna selection system

[0131] 图6所示的是SC-MIM0-0FDM系统600,该系统除使用根据本发明一些实施例的天线选择方法外,还使用预编码技术。 Is [0131] shown in FIG. 6 SC-MIM0-0FDM system 600, in addition to the system using the external antenna selection method of some embodiments of the present invention, also using precoding technique. 在图6的实施例中,预编码涉及发射器602上执行的各种基带加权和组合方案。 In the embodiment of FIG. 6, the pre-coding involves baseband weighting and combining various programs executed on the transmitter 602. 参考图6,单码流符号604由一组复合因子608加权和组合以生成一组N个输出信号,其中N与发射器602中使用的RF链路612的数目有关。 Referring to FIG 6, the single symbol stream 604 by a set of complex weighting factors 608 and combined to generate a set of N output signals, where N is the number of RF link 612 to the transmitter 602 using. 接着,这N个输出信号通过N个RF链路612以产生N个RF信号。 Subsequently, the N output signals through N RF link 612 to produce N RF signals. 接着,该N个RF信号被开关620连接到M个发射天线单元616中相应的一组N个发射天线单元并通过信道624发射。 Subsequently, the N RF signal switch 620 is connected to the M transmission antennas in a respective unit 616 a set of N transmit antenna elements 624 and transmitted through the channel.

[0132] 接收器622中,开关630从M个接收天线单元626中选择N个接收天线单元以接收通过信道624进来的信号。 [0132] In the receiver 622, the switch 630 selects the N receiving antenna units from the M receive antenna elements 626 to the signal received via the channel 624 coming. 接着,该N个RF接收信号被N个RF链路634处理,并为进行基带处理而转换成数字域以还原原始发射信号。 Subsequently, the N received RF signal is processed N RF links 634, and is converted into a digital baseband processing to restore the original domain transmission signal.

[0133] 例如,根据本发明一些方面的一些实施例,将基带加权608和天线选择方法设计到一起,以共同将BER最小化。 [0133] For example, in accordance with some embodiments according to some aspects of the present invention, weighting the baseband antenna selection method 608 and design together to jointly minimize the BER. 例如,根据本发明一些方面的一些实施例中,选择基带加权608来最大化输出SNR(或SINR)或容量,同时实施天线选择以最小化BER。 For example, some embodiments according to some aspects of the present invention, the selected output 608 to maximize weighted baseband SNR (or SINR) or capacity, the antenna simultaneously selected to minimize BER. 与最大奇异值(singular value)对应的子信道矩阵^^的右奇异矢量和左奇异矢量可用于选择最佳的发射天线616的子集、接收天线626的子集以及合适的发射基带加权608和接收基带加权640。 Corresponding to the largest singular value (singular value) subchannel matrix of right singular vectors ^^ left singular vector and may be used to select the best subset of transmit antenna 616, receiving antenna 626 and a suitable subset of the transmit baseband weight of 608 and 640 receive baseband weight. JB Andersen $《IEEE Antennas and Propagation Magazine》2000 $ 4 月H 42 · 第2号第13-16页中,对未采用天线选择ΜΙΜΟ系统范围内的基带加权值的确定进行了描述,本发明全文参考了该文章。 JB Andersen $ "IEEE Antennas and Propagation Magazine" 2000 $ April 13-16 H 42 · page No. 2, the selection of the group is determined with the weighting value range of the system is not used ΜΙΜΟ antenna has been described, the present invention entirety by reference the article.

[0134] 可用时空编码模块取代发射器602中的基带加权608来修改图6所示的实施例。 Baseband weight 608 [0134] space-time encoding module available substituted transmitter 602 modified embodiment shown in FIG. 6. 这种情况下,根据本发明一些实施例,发射器和接收器上都使用天线选择方法来选择天线子集。 In this case, according to some embodiments, the transmitter and receiver of the present invention uses antenna selection method to select the antenna subsets. 另外,时空编码模块处理符号的输入码流,如S. Μ. Alamouti在《IEEE Journal on Selected Areas in Communications》1998 年10 月第8 期第16 卷第1451-1458 页的“A simple transmit diversity technique for wireless communications,,中所述。 Further, the input stream of symbols space-time coding processing module, such as S. Μ. Alamouti in "A simple transmit diversity" IEEE Journal on Selected Areas in Communications "Vol. 16, No. 8, pp. 1451-1458 October 1998 the technique for wireless communications ,, in the.

[0135] D、DS-SS-SIMO系统的天线选择 [0135] D, antenna selection DS-SS-SIMO system

[0136] 图7是DS-SS SIMO系统的具有2个接收天线单元704 (ηκ= 2)的接收器700的示意图。 [0136] FIG. 7 is a two receiving antenna units 704 (ηκ = 2) is a schematic diagram of a receiver 700 DS-SS SIMO system with. 接收器700结合了RAKE接收器功能和典型的天线选择处理。 The receiver 700 combines the typical RAKE receiver function, and an antenna selection processing. 如图所示,接收器700 仅设置有单个RF链路708,在任何时刻下,开关712将该RF链路708连接到两个接收天线单元704中的一个天线单元。 As shown, receiver 700 is provided with only a single RF chain 708, at any time, the RF switch 712 is connected to the link 708 two receiving antenna units 704 one antenna element. 基于最小BER标准来确定选择两个天线单元704中的哪个天线单元与RF链路708连接。 BER is determined based on the minimum criteria to select which antenna element and the RF link 704. two antenna elements 708 are connected. 根据本发明一些方面的一些实施例中,计算与每个接收天线单元704对应的接收信号的BER值,选择获得最小BER值的天线单元704。 According to some embodiments according to some aspects of the present invention, the calculated BER of the received signal with each corresponding receiving antenna unit 704, the antenna unit 704 to obtain the minimum value of the BER. 因为BER通常是可适用的信道以及使用的编码/调制和天线组合技术的复杂的函数,给定信道和天线组合技术给定时,近似表示BERdi BER的变化是所使用的编码/调制方法的函数。 Because the BER is often a complex function of the applicable channel encoding used / modulation and antenna combination techniques, given channel and antenna combination techniques given time, approximately represents a change BERdi BER is a function used for coding / modulation method.

[0137] 一旦选择出天线单元704中的最佳天线,RAKE接收器以在单入单出(SISO)系统(如链路的每端有一个天线)中相同的方式运行。 Run [0137] Upon selection of the best antenna in the antenna unit 704, RAKE receiver for a single input single output (SISO) systems (e.g., one at each end of the link antenna) in the same manner. RAKE接收器使用J个相关器720 (如图7中J = 2),每个相关器都与第一J个独立多径组件之一对应。 J RAKE receiver uses correlators 720 (FIG. 7 J = 2), each associated with one of the first device corresponds J individual multipath components. 每一个这样的组件都分别与时延相关,j = 1,……,J0接着,每个相关器720的输出(如指针)被加权730和组合740以形成接收信号的单个输出750,该输出750包括已发射信号的估算。 Each of these components are respectively associated with the delay, j = 1, ......, J0 Next, the output (e.g., pointer) 720 each correlator 730 is a weighted combination of 740 and a received signal to form a single output 750, the output 750 including estimates of the transmitted signal.

[0138] 在一个实施例中,在RAKE接收器的输入端,对应于第i个天线单元704的接收信号可表示为: [0138] In one embodiment, at the input of the RAKE receiver, the received signal corresponding to the i-th antenna element 704 can be expressed as:

Figure CN1868147BD00211

(3) (3)

[0140] 其中,Li是第i个天线单元704接收的信道中的抽头(tap)的数目,Iii,i是天线i 和抽头f的复合信道增益,P是信号发射功率,d是包括周期T的符号的数据序列,P是扩展序列,该扩展序列包括周期Tc = T/G的芯片,其中G是扩展因子。 [0140] wherein, Li is the number of taps of the channel of the i-th antenna unit 704 received (TAP) is, Iii, i is the complex channel gain antenna i and tap f, P is signal transmission power, d is a period T data symbol sequence, P is the spreading sequence, the extension sequence comprising a chip cycle Tc = T / G, where G is the spreading factor. 另外,τ u对应于抽头f 和天线i的路径延迟,W0对应于载波频率,W0 = 2π f0, θ u对应于抽头和天线i的移相。 Further, τ u f and the path corresponding to the tap delay antenna i, W0 corresponding to the carrier frequency, W0 = 2π f0, the phase shift θ u and the tap corresponding to the antenna i. 在第i天线单元704上测得的噪声Iii的模型为两端频谱密度为队/2的AWGN处理。 Measured in the i-th antenna element 704 is obtained Iii noise spectral density model ends AWGN treatment team / 2. 为了表达简洁和清晰,等式 In order to express simplicity and clarity, the equation

[0141] (3)假定单用户环境。 [0141] (3) assuming that a single user environment. 但是,本发明不局限于该假定,本发明能应用到多用户环境中。 However, the present invention is not limited to this assumption, the present invention can be applied to a multi-user environment.

[0142] 在第j个指针的相关器720的输出端,接收信号如下表示: [0142] at the output of the j-th correlators pointer 720, the received signal is expressed as follows:

[0143] ruj =甚j^n (t)p(t - Xj )cos(w0 (t-xj)- Qj)dt= ^fPThiJd0 + nUj (4.) [0143] ruj = very j ^ n (t) p (t - Xj) cos (w0 (t-xj) - Qj) dt = ^ fPThiJd0 + nUj (4.)

[0144] 其中Cltl是将要调制的期望符号,Iii,i是具有0均值和两端频谱密度为队/2的AWGN 噪声成分。 [0144] wherein Cltl is desired to be modulated symbols, Iii, i are AWGN noise components having a zero mean and the spectral density for the team ends / 2. 同样为了表达简洁和清晰,假定等式(4)中没有路径内干扰(IPI)。 Also for clarity and brevity the expression, it is assumed in Equation (4) is not within the path interference (IPI). 但是,本发明也能用于存在IPI的环境中。 However, the present invention can also be used in the presence of an IPI environment.

[0145] 分集组合之后,与第i个天线单元704对应的RAKE接收器的最终输出是: [0145] After diversity combining, the final output of the i-th antenna RAKE receiver unit 704 corresponds to:

Figure CN1868147BD00212

[0147] 其中J是RAKE接收器的指针数目,通常选择最适宜的组合加权以匹配信道,如: [0147] where J is the number of RAKE receivers pointer, select the most suitable combination typically weighted to match the channel, such as:

Figure CN1868147BD00213

(6.) (6.)

[0149] 这种环境下,RAKE执行最大比例的组合,与第i个天线单元704对应的的RAKE输出端的SNR是: [0149] Under such circumstances, performing maximum ratio RAKE combination, RAKE output of the i-th antenna element corresponding to 704 SNR is:

Figure CN1868147BD00214

[0151] 其中,Y μ是与第i个天线单元704关联的第j个路径上组合后的SNR。 The combined SNR on the j-th path [0151] wherein, Y μ i is associated with the first antenna element 704. 基于等式(4),可以用下式表示: Based on the equation (4) can be represented by the following formula:

21[0152] 21 [0152]

Figure CN1868147BD00221

[0153] 其中,σ2= 是噪声功率。 [0153] where, σ2 = is the noise power.

[0154] 可从对Yi的似然密度函数(PDF)的认知中获取与第i个天线单元704对应的RAKE接收器的输出端的BER。 [0154] available output of the RAKE receiver is a BER and the i-th antenna element 704 from the corresponding cognitive Yi likelihood density function (PDF) of. 例如,如果数据序列没有使用编码,应用了BPSK调制,如JG Proakis, 1995 年McGraw-Hill 系列,第3 版的“DigitalCommunications” 中所述的方 For example, if the data coding sequence is not used, the application of BPSK modulation, such as JG Proakis, in series 1995 McGraw-Hill, 3rd Edition "DigitalCommunications" in the square

法,通过将表示为^d)的条件差错概率结合到Y ^勺似然密度函数(PDF)中能求出BER, Law, expressed by the probability of an error condition ^ d) is bonded to Y ^ spoon likelihood density function (PDF) can be determined in the BER,

如: Such as:

[0155] [0155]

Figure CN1868147BD00222

[0156] 一旦估算完所有的接收天线的BER,就选择获得最小BER的天线单元704 : [0156] Upon completion of all the estimated BER receive antennas, selects an antenna unit 704 for minimum BER:

[0157] [0157]

Figure CN1868147BD00223

[0158] 其中,ηκ表示接收天线单元的总数。 [0158] wherein, ηκ represents the total number of receive antenna elements.

[0159] 显然,当在系统中加入编码(如turbo编码,卷积编码)和使用其他调制级时,等式(9)中使用的用于估算BER的模拟函数将需要改变。 [0159] Obviously, when coding is added (e.g., turbo coding, convolutional coding) used in the system and other modulation stage, Equation (9) for estimating the analog BER function is used will need to change. 根据本发明一些方面的一些实施例中,典型的天线选择运算法则能使用任何能够准确模拟给定系统中BER行为的拟合函数。 Some embodiments according to some aspects of the present invention, a typical antenna selection algorithms can be used to accurately simulate any fitting function given system behavior according to BER. 通常,拟合函数取决于以下一项或多项参数,例如:信道、使用的编码和/调制、发射端和/ 或接收端的信号处理、接收器SNR和其他参数。 Typically, the fit function is dependent on one or more parameters, for example: channel coding used and / modulation, transmitter and / or receiver side of signal processing, the receiver SNR and other parameters.

[0160] 图7所示的典型的实施例可扩展到二维RAKE接收器,二维RAKE接收器中进行空间域和时间域的处理。 The exemplary embodiment illustrated in [0160] FIG. 7 may be extended to a two-dimensional RAKE receiver spatial processing and temporal dimensional RAKE receiver. 在该范围内,可结合典型的天线选择运算法则来从总共M个天线中选择N(N> 1)个天线的子集(M> N),所选择的子集将二维RAKE输出端的BER最小化。 Within this range, may be combined with the typical antenna selection algorithm to select N (N> 1) a subset of antennas (M> N) from a total of M antennas, a subset of the selected two-dimensional RAKE output terminal BER minimize.

[0161] 本发明是通过一些实施例进行描述的,本领域技术人员知悉,在不脱离本发明的精神和范围的情况下,可以对这些特征和实施例进行各种改变或等效替换。 [0161] The present invention has been described with reference to certain embodiments, those skilled in the art knows, without departing from the spirit and scope of the present invention, various changes may be made to these embodiments or features and equivalents. 另外,在本发明的教导下,可以对这些特征和实施例进行修改以适应具体的情况及材料而不会脱离本发明的精神和范围。 Further, the teachings of the present invention, modifications may be made to these embodiments and features to adapt a particular situation or material without departing from the spirit and scope of the invention. 因此,本发明不受此处所公开的具体实施例的限制,所有落入本申请的权利要求范围内的实施例都属于本发明的保护范围。 Accordingly, the present invention is not limited to the specific embodiments disclosed herein, embodiments within the scope of the present invention fall within the protection scope of all to fall within the present application.

Claims (10)

  1. 一种选择接收器的接收天线的子集以接收被发射的RF信号的方法,包括:建立所述接收天线的可能的子集;确定与所述接收天线的可能的子集对应的信道参数统计组;计算接收器的输出误码率,每个输出误码率都基于至少一组信道参数统计而计算;根据以所计算的输出误码率、发射模式、输出误码率的最小值、数据速率的最大值为基础的标准选择接收天线的特定的可能子集;将接收器的一个或多个RF链路连接到所选择的特定的可能子集的接收天线上;其中,至少一个所述输出误码率用闭型表达式近似表示,所述闭型表达式至少包括以下之一:a)y=‑tanh(x),b)c)d)y=‑(1‑e‑0.2x),或e)并在选择接收天线以使得输出误码率最小化的同时,在接收器中,使用接收基带加权,以使得输出信噪比、信号与干扰及噪声比或容量最大化;其中,所述选择接收天线的 One selected subset of receivers receive antenna to receive an RF signal to be transmitted, comprising: establishing a subset of possible receiving said antenna; determining a subset of possible receiving antenna corresponding to the channel parameter statistics set; calculating a bit error rate of the receiver output, each output bit error rate are calculated based on at least one set of parametric statistical channel; the minimum value according to the calculated output error rate, transmission mode, the output bit error rate, the data the maximum rate based on specific selection criteria receive antennas possible subsets; and a receiver connected to one or more RF links selected particular antenna may be received on the sub-set; wherein said at least one, output BER approximated by the closed-form expression, a closed-form expression comprises at least one of the following: a) y = -tanh (x), b) c) d) y = - (1-e-0.2x ), or e) and selecting the receiving antenna so that the output bit error rate while minimizing, at the receiver, using the received baseband weight, so that the output signal to noise ratio, signal to interference and noise ratio or to maximize capacity; wherein the selected receiving antenna 特定可能的子集包括以下步骤:将使用相同数据速率的天线子集的所有组合归组到公用存储池中;选择与n个最高数据速率对应的n个存储池,其中,n=1或2或3;在所述存储池中,选择能将误码率的均值、误码率的最大值或误码率的最小值最小化的天线子集。 Possible specific subset comprises the steps of: grouping all combinations of data rates using the same subset of antennas to a common storage pool; selecting the highest data rate to n corresponding to the n memory cell in which, n = 1 or 2 or 3; storage pool in the minimum, mean, maximum bit error rate or bit error rate BER can select a subset of the antenna is minimized. FSB00000327861500011.tif,FSB00000327861500012.tif,FSB00000327861500013.tif FSB00000327861500011.tif, FSB00000327861500012.tif, FSB00000327861500013.tif
  2. 2.根据权利要求1所述的方法,还包括:选择发射模式,其中,每种发射模式的选择都基于至少一组信道参数统计。 2. The method according to claim 1, further comprising: selecting a transmission mode, wherein each selected transmission mode are set based on at least one channel parameter statistics.
  3. 3.根据权利要求1所述的方法,其中,每组信道参数统计包括接收器的输出信噪比、输出信号与干扰及噪声比、对数似然率、信号群的欧几里得距离中的至少一种。 3. The method according to claim 1, wherein, each group comprising channel parameters statistical noise ratio of the receiver output, the output signal to interference and noise ratio, the Euclidean distance log-likelihood ratio, the signal group at least one.
  4. 4.根据权利要求1所述的方法,其中,每组信道参数统计包括一阶统计、二阶统计和更高阶统计中的至少一种。 4. The method according to claim 1, wherein each set of channel parameters comprises at least one statistical order statistical, higher-order and second-order statistics of the statistics.
  5. 5. 一种选择发射器的发射天线的子集以发射RF输入信号的方法,其中所发射的RF输入信号作为随后由接收器接收的多个输出RF信号,所述方法包括:建立发射天线的可能的子集;确定与所述发射天线的可能的子集对应的信道参数统计组; 选择分别与各组信道参数统计对应的发射模式;计算接收器的输出误码率,每个输出误码率都基于至少一组信道参数统计以及至少一种所选择的发射模式而计算;根据至少以所计算的输出误码率、发射模式、输出误码率的最小值、数据速率的最大值为基础的标准选择发射天线的特定的可能子集;将发射器的一个或多个RF链路连接到所选择的特定的可能子集的发射天线上;其中, A selected subset of transmit antenna transmitter to transmit an RF input signal method, wherein the RF input signal is then transmitted as a plurality of output RF signal received by the receiver, the method comprising: establishing a transmission antenna possible subsets; determining a subset of the possible transmission antenna channel parameters corresponding statistics group; statistical selected respectively corresponding to each group of channel parameters of a transmission mode; calculating a bit error rate of the receiver output, each output error rates are calculated based on at least one set of channel parameters and statistics at least one transmission mode selected; at least according to the output of the bit error rate calculated, the transmission mode, the minimum value of the output bit error rate, a maximum data rate based on the criteria for selecting a specific subset of possible transmit antennas; and a transmitter connected to one or more RF links to a particular subset of the possible transmission antenna selected; wherein,
    Figure CN1868147BC00031
    至少一个所述输出误码率用闭型表达式近似表示,所述闭型表达式至少包括以下之 At least one of said output bit error rate is approximated with a closed-form expression, a closed-form expression of at least the following
    Figure CN1868147BC00032
    并在选择发射天线以使得输出误码率最小化的同时,在发射器中,使用发射基带加权, 以使得输出信噪比、信号与干扰及噪声比或容量最大化; 所述选择发射天线的特定可能的子集包括以下步骤: 将使用相同数据速率的天线子集的所有组合归组到公用存储池中; 选择与η个最高数据速率对应的η个存储池,其中,η = 1或2或3 ; 在所述存储池中,选择能将误码率的均值、误码率的最大值或误码率的最小值最小化的天线子集。 And selecting the transmitting antenna so that the output while minimizing the bit error rate, in the transmitter, using a transmit baseband weight, so that the output signal to noise ratio, signal to interference and noise ratio or to maximize capacity; the selected transmit antenna possible specific subset comprises the steps of: grouping all combinations of data rates using the same subset of antennas to a common storage pool; selected data rate with the highest [eta] [eta] corresponding to the storage pool, wherein, η = 1 or 2 or 3; storage pool in the minimum, mean, maximum bit error rate or bit error rate BER can select a subset of the antenna is minimized.
  6. 6.根据权利要求5所述的方法,其中,每组信道参数统计包括接收器的输出信噪比、输出信号与干扰及噪声比、对数似然率、信号群的欧几里得距离中的至少一种。 6. The method according to claim 5, wherein the statistical parameters include a channel receiver output signal to noise ratio, signal to interference and noise output ratio for each group, the Euclidean distance log-likelihood ratio, the signal group at least one.
  7. 7. —种在包括发射器和接收器的通信系统中选择天线的方法,所述发射器包括发射天线,该发射天线使用两个或多个RF发射链路通过信道发射一组空间复用的RF输出信号,所述接收器包括接收天线,该接收天线用于接收该组空间复用的RF输出信号和相应地生成一组经两个或多个RF链路处理的空间复用的接收RF信号,所述方法包括:建立所述发射天线的可能的子集和所述接收天线的可能的子集; 确定对应于所述发射天线的可能子集和所述接收天线的可能子集的各种组合的信道参数统计;选择分别与各种信道参数统计对应的发射模式;计算接收器的输出误码率,每个输出误码率都基于至少一组信道参数统计以及所选择的相应的发射模式而计算;根据至少以所计算的输出误码率、发射模式、输出误码率的最小值、数据速率的最大值为基础的标准选择发射天 7. - species in a communication system includes a transmitter and a receiver antenna selection in the method, said transmitter comprises a transmitting antenna, the transmitting antenna using two or more transmit RF link transmission via a set of spatial multiplexing channels RF output signal, said receiver comprising a receiving antenna, a receiving antenna for receiving the RF output signal of the set of spatial multiplexing and generate a corresponding set of receive RF processing space via the RF link two or more multiplexed signal, the method comprising: establishing a subset of the possible transmit antennas and possibly a subset of the receive antennas; may be determined to correspond to a subset of the transmit antennas and the reception antenna may be a subset of each combination of channel parameter statistics; respectively selecting various statistical parameters corresponding channel transmission mode; calculating a bit error rate of the receiver output, each output bit error rate is based on at least one set of statistics, and the channel parameters corresponding to the selected emission calculation mode; transmit antenna selected in accordance with at least, a transmission mode, the minimum value of the output bit error rate, a maximum data rate of the output bit error rate calculated based on a standard 的特定的可能子集和接收天线的特定的可能子集; 将所述两个或多个RF发射链路连接到所选择的特定的发射天线的可能子集上; 将所述两个或多个RF接收链路连接到所选择的特定的接收天线的可能子集上; 其中,至少一个所述输出误码率用闭型表达式近似表示,所述闭型表达式至少包括以下之a) y = -tanh (χ), The possible subsets of the particular transmit antenna of the two or more RF transmitters to the selected link connections;; a specific subset of possible specific subsets may receive antennas and the two or more on a particular subset of possible receiving antenna of RF receiver connected to the selected link; and wherein the at least one of said output bit error rate is approximated with a closed-form expression, a closed-form expression comprises at least of a) y = -tanh (χ),
    Figure CN1868147BC00041
    并在选择发射天线和接收天线以使得输出误码率最小化的同时,在发射器和接收器中,分别使用发射基带加权和接收基带加权,以使得输出信噪比、信号与干扰及噪声比或容量最大化;所述选择所述发射天线的特定可能的子集和所述接收天线的特定可能的子集包括以下步骤:将使用相同数据速率的天线子集的所有组合归组到公用存储池中; 选择与η个最高数据速率对应的η个存储池,其中,η = 1或2或3 ; 在所述存储池中,选择能将误码率的均值、误码率的最大值或误码率的最小值最小化的天线子集。 Selecting and transmitting and receiving antennas so that the output while minimizing the error rate, the transmitter and receiver, respectively, using a transmit baseband weight and the receive baseband weight, so that the output signal to noise ratio, signal to interference and noise ratio or maximize the capacity; the selection of a particular subset of the possible transmit antennas and a particular subset of the possible receive antennas comprising the steps of: grouping all combinations of the antenna sub-sets with the same data rate to a public storage pool; selected data rate with the highest [eta] [eta] corresponding to the storage pool, wherein, η = 1 or 2 or 3; the maximum value of the storage pool, the mean bit error rate BER can select or the minimum bit error rate is minimized subset of antennas.
  8. 8.根据权利要求7所述的方法,其中,每一组信道参数统计包括接收器的输出信噪比、 输出信号与干扰及噪声比、对数似然率、信号群的欧几里得距离中的至少一种。 The method according to claim 7, wherein each set of channel parameters including statistical noise ratio of the receiver output, the output signal to interference and noise ratio, the Euclidean distance log-likelihood ratio signal group at least one.
  9. 9. 一种在包括发射器和接收器的通信系统中选择天线的方法,所述发射器包括发射天线,该发射天线使用一个或多个RF发射链路通过信道发射一组RF输出信号,所述接收器包括接收天线,该接收天线用于接收该组RF输出信号和相应地生成一组经一个或多个RF接收链路处理的接收RF信号,该方法包括:建立所述发射天线的可能的子集和所述接收天线的可能的子集; 确定对应于所述发射天线的可能子集和所述接收天线的可能子集的各种组合的信道参数统计;选择分别与各种信道参数统计对应的发射模式;计算接收器的输出误码率,每个输出误码率都基于至少一组信道参数统计以及所选择的相应的发射模式而计算;根据至少以所计算的输出误码率、发射模式、输出误码率的最小值、数据速率的最大值为基础的标准选择发射天线的特定的可能子集和接收天线 An antenna selection in a communication system includes a transmitter and a receiver in the method, said transmitter comprises a transmitting antenna, the transmitting antenna using one or more RF transmit channel transmission links via a set of RF output signals, the said receiver includes a receiving antenna, the receiving antenna for receiving the RF output signal and the corresponding group generates a set of one or more RF receiver receives the RF signal processing link, the method comprising: establishing the transmit antennas may and the subset may be a subset of receive antennas; determining a subset may correspond to the transmit antenna and the channel parameters of the various combinations of possible subsets of receive antennas statistics; selecting various channel parameters, respectively statistical corresponding transmission mode; calculating a bit error rate of the receiver output, each output bit error rate are calculated based on at least one set of channel parameters and statistics corresponding to the selected transmission mode; at least calculated according to the error rate output , the transmission mode, the minimum value of the output bit error rate, a maximum data rate based on specific selection criteria may transmit antennas and receive antennas subsets 特定的可能子集;将所述一个或多个RF发射链路连接到所选择的特定的发射天线的可能子集上; 将所述一个或多个RF接收链路连接到所选择的特定的接收天线的可能子集上; 其中,至少一个所述输出误码率用闭型表达式近似表示,所述闭型表达式至少包括以下之 Specific possible subsets; the one or more RF transmit chain may be connected to a specific subset of the selected transmission antenna; the one or more RF receiving a link connected to the selected specific subset may receive antennas; wherein the at least one of said output bit error rate is approximated with a closed-form expression, a closed-form expression of at least comprising
    Figure CN1868147BC00042
    并在选择发射天线和接收天线以使得输出误码率最小化的同时,在发射器和接收器中,分别使用发射基带加权和接收基带加权,以使得输出信噪比、信号与干扰及噪声比或容量最大化;所述选择所述发射天线的特定可能的子集和所述接收天线的特定可能的子集包括以下步骤:将使用相同数据速率的天线子集的所有组合归组到公用存储池中; 选择与η个最高数据速率对应的η个存储池,其中,η = 1或2或3 ; 在所述存储池中,选择能将误码率的均值、误码率的最大值或误码率的最小值最小化的天线子集。 Selecting and transmitting and receiving antennas so that the output while minimizing the error rate, the transmitter and receiver, respectively, using a transmit baseband weight and the receive baseband weight, so that the output signal to noise ratio, signal to interference and noise ratio or maximize the capacity; the selection of a particular subset of the possible transmit antennas and a particular subset of the possible receive antennas comprising the steps of: grouping all combinations of the antenna sub-sets with the same data rate to a public storage pool; selected data rate with the highest [eta] [eta] corresponding to the storage pool, wherein, η = 1 or 2 or 3; the maximum value of the storage pool, the mean bit error rate BER can select or the minimum bit error rate is minimized subset of antennas.
  10. 10. 一种从M个天线单元的发射器或M个天线单元的接收器中选择N个天线单元的系统,其中N小于Μ,包括:M个天线单元的发射器或M个天线单元的接收器中的M个天线单元; N个RF链路;和连接到该N个RF链的开关,其中,该M个天线单元的接收器计算该M个天线单元中每一可能的N个天线单元子集的输出误码率,每一个输出误码率都至少基于一组信道参数统计而计算,所述M个天线单元的接收器基于以所计算的输出误码率、发射模式、输出误码率的最小值、数据速率的最大值为基础的标准选择特定的N天线单元子集;和作为对基于所述标准选择特定的N天线单元子集的响应,所述开关将所述N个RF链路连接到该特定N天线单元子集的N个天线单元上; 其中,至少一个所述输出误码率用闭型表达式近似表示,所述闭型表达式至少包括以下之 10. A system select N antenna elements from the transmitter or receiver antennas of M elements of M antenna elements, where N is less than [mu], comprising: M transmit antenna elements, or M receive antenna elements is the M antenna elements; N RF links; and a switch coupled to the N RF chains, wherein the antenna receiver of the M calculation unit of the M antenna units each possible N antenna elements BER output subsets, each output bit error rates are at least a set of channels based on the statistical parameters is calculated, the M antenna elements based on the output of the receiver to the calculated error rate, transmission mode, the output of the error the maximum value of the minimum rate, data rate based criteria to select a particular subset of the N antenna elements; and in response to a subset of the N antenna elements based on the selection of a particular standard, the RF switch to the N the link to the N antenna elements of the particular subset of antenna elements N; wherein at least one of said output bit error rate is approximated with a closed-form expression, a closed-form expression of at least the following
    Figure CN1868147BC00051
    并在选择发射天线和接收天线以使得输出误码率最小化的同时,在发射器和接收器中,分别使用发射基带加权和接收基带加权,以使得输出信噪比、信号与干扰及噪声比或容量最大化;所述选择所述发射天线的特定可能的子集或所述接收天线的特定可能的子集包括以下步骤:将使用相同数据速率的天线子集的所有组合归组到公用存储池中; 选择与η个最高数据速率对应的η个存储池,其中,η = 1或2或3 ; 在所述存储池中,选择能将误码率的均值、误码率的最大值或误码率的最小值最小化的天线子集。 Selecting and transmitting and receiving antennas so that the output while minimizing the error rate, the transmitter and receiver, respectively, using a transmit baseband weight and the receive baseband weight, so that the output signal to noise ratio, signal to interference and noise ratio or maximize the capacity; the selection of the specific subset of possible transmit antennas or a subset of the possible specific receiving antenna comprising the steps of: a data rate using the same subset of antennas of all combinations grouping public store pool; selected data rate with the highest [eta] [eta] corresponding to the storage pool, wherein, η = 1 or 2 or 3; the maximum value of the storage pool, the mean bit error rate BER can select or the minimum bit error rate is minimized subset of antennas.
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Dhananjay Gore,Arogyaswami Paulraj.Statistical MIMO Antenna Sub-Set Selection with Space-timeCoding.IEEE.2002,第641-645页.

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