CN101496306A - Multi-antenna station with distributed antenna - Google Patents

Multi-antenna station with distributed antenna Download PDF

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Publication number
CN101496306A
CN101496306A CN 200680028351 CN200680028351A CN101496306A CN 101496306 A CN101496306 A CN 101496306A CN 200680028351 CN200680028351 CN 200680028351 CN 200680028351 A CN200680028351 A CN 200680028351A CN 101496306 A CN101496306 A CN 101496306A
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China
Prior art keywords
antennas
antenna
set
plurality
multi
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CN 200680028351
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Chinese (zh)
Inventor
S·德拉维达
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高通股份有限公司
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Application filed by 高通股份有限公司 filed Critical 高通股份有限公司
Priority to US14499406A priority Critical
Priority to PCT/US2006/021400 priority patent/WO2007142623A1/en
Publication of CN101496306A publication Critical patent/CN101496306A/en

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W88/00Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/08Access point devices
    • H04W88/085Access point devices with remote components
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0686Hybrid systems, i.e. switching and simultaneous transmission
    • H04B7/0691Hybrid systems, i.e. switching and simultaneous transmission using subgroups of transmit antennas

Abstract

A multi-antenna station with distributed antennas and capable of providing good performance for terminals distributed throughout the coverage area of the multi-antenna station is described. The multi-antenna station includes multiple antennas, a controller, and at least one transmitter unit. The multiple antennas are coupled to the multi-antenna station and include at least one remote antenna that is located away from the multi-antenna station. The controller selects a set of one or more antennas from among the multiple antennas for data transmission to a terminal. The at least one transmitter unit transmits data to the terminal via the set of one or more antennas.

Description

具有分布式天线的多天线站 Multi-antenna stations with a distributed antenna

[0001] 技术领域 [0001] Technical Field

[0002] 本公开一般涉及通信,并更具体涉及多天线站。 [0002] The present disclosure relates generally to communication, and more specifically to multi-antenna station.

[0003] 背景技术 [0003] BACKGROUND OF THE INVENTION

[0004] 无线局域网(WLAN)具有服务一个或多个用户终端的一个或多个接入点。 [0004] Wireless LAN (WLAN) having one or more user terminals and services of one or more access points. 接入点的数目和用户终端的数目取决于WLAN的大小。 The number of access points and user terminals depends on the size of the WLAN. 例如,单个接入点可以服务遍及WLAN部署区域分布的多个用户终端,其中WLAN部署区域可以是整个建筑物、建筑物的一层等。 For example, a single access point may serve a plurality of user terminals throughout the WLAN deployment areas distributed, wherein the WLAN deployment area may be the entire building, floor of a building and the like. 如果接入点是静止的,通常是这种情况,那么由每个用户终端获得的性能典型地取决于该用户终端相对于接入点的位置。 If the access point is stationary, normally the case, the performance obtained by each user terminal typically depend on the position of the user terminal with respect to the access point. 公知的是,无线电频率(RF)信号在发射器和接收器之间的信号路径中被障碍物(例如,墙壁)和非自然信号(artifact)(例如,噪声和干扰)劣化。 It is well known that radio frequency (RF) signal by an obstacle in the signal path between the transmitter and the receiver (e.g., a wall) and artifacts (artifact) (e.g., noise and interference) deteriorated. 因此,靠近接入点并位于接入点能看得到的地方的附近用户终端可以比远离接入点并且不处于接入点的可视范围内的远程用户终端获得更好的性能。 Thus, the vicinity of the access point and the user terminal is located close to the access point may be able to see the place away from the access point than the remote user and not in the visible range of the access point of the terminal to obtain better performance. 因此,典型地,对于位于WLAN部署区域的不同部分中的不同用户终端而言,可获得不同的性能水平(例如,不同的数据速率)。 Thus, typically, for a WLAN deployment areas located in different parts of the different user terminals, to obtain different performance levels (e.g., different data rates).

[0005] 向WLAN部署区域中的所有用户终端或尽可能多的用户终端提供相似的性能水平是所期望的。 [0005] to provide a similar level of performance for all user terminals or WLAN deployment areas, as many user terminals are desirable. 因此本领域中需要一种能够向用户终端提供这样的性能的接入点。 Therefore a need for such access points can be provided to the user terminal performance in the art.

[0006] 发明内容 [0006] SUMMARY OF THE INVENTION

[0007] 本文描述了一种多天线站,其具有分布式天线并能够为遍及该多天线站的覆盖区域分布的终端提供良好性能。 [0007] Described herein is a multi-antenna station having distributed antennas and can provide good performance for the distributed throughout the coverage area of ​​the terminal of the multi-antenna station. 根据本发明的一个实施例,描述了一种多天线站,其包括多个天线、控制器和至少一个发射器单元。 According to an embodiment of the present invention, it describes a multi-antenna station comprising a plurality of antennas, controllers and at least one transmitter unit. 多个天线连接到多天线站并且包括远离多天线站的至少一个远程天线。 A plurality of antennas connected to the multi-antenna comprises at least one remote station and a multi-antenna away from the antenna station. 控制器从多个天线中选择一组一个或多个天线以向终端进行数据发送。 The controller selects a set of one or more antennas from the plurality of antennas for transmitting data to the terminal. 至少一个发射器单元经由该组一个或多个天线向终端发送数据。 At least one transmitter unit transmits data to the terminal via the set of one or more antennas.

[0008] 根据另一实施例,提供了一种方法,其中从多个天线中选择一组一个或多个天线以从多天线站向终端进行数据发送。 [0008] According to another embodiment, a method is provided, wherein selecting a set of one or more antennas from the plurality of antennas for transmitting data from a multi-antenna station to the terminal. 多个天线包括远离多天线站的至少一个远程天线。 A plurality of antennas comprising at least one remote antenna away from the multi-antenna station. 数据经由该组一个或多个天线被发送到终端。 Data is transmitted to the terminal via the set of one or more antennas.

[0009] 根据又一实施例,描述了一种设备,其包括用于从多个天线中选择一组一个或多个天线以向终端进行数据发送的装置,其中多个天线包括远离所述设备的至少一个远程天线,所述设备还包括用于经由该组一个或多个天线向终端发送数据的装置。 [0009] According to a further embodiment, an apparatus is described which includes means for selecting a set of one or more antennas from the plurality of antennas to perform data transmission to a terminal device, wherein a plurality of said antennas comprises a remote device at least one remote antenna, said apparatus further comprising means for transmitting data to the terminal via a set of one or more antennas.

[0010] 下面将进一步详细描述本发明的各个方面和实施例。 [0010] Various aspects and embodiments of the present invention will be described in further detail below.

[0011] 附图说明 [0011] BRIEF DESCRIPTION OF DRAWINGS

[0012] 图1示出了具有单个接入点和多个用户终端的WLAN。 [0012] FIG. 1 shows a single WLAN access point and having a plurality of user terminals.

[0013] 图2A至2D示出了用于接入点的四个天线配置。 [0013] Figures 2A to 2D show four antenna configuration for an access point.

[0014] 图3示出了由接入点执行以向用户终端发送数据并从用户终端接收数据的处理。 [0014] FIG. 3 shows a process performed by the access point to the user terminal transmits data to and receiving data from the user terminal.

[0015] 图4示出了接入点的框图。 [0015] FIG. 4 shows a block diagram of an access point.

[0016] 图5A和5B示出了远程前端的两个实施例。 [0016] FIGS. 5A and 5B show two embodiments of the tip of the remote.

[0017] 具体实施方式 [0017] DETAILED DESCRIPTION

[0018] “示例性的”这个词在本文中用来指“作为实例、例子或例证”。 [0018] "exemplary" is used herein to refer to the word "as an example, instance, or illustration." 本文中描述为“示例性的”任何实施例不是必须要被看作比其它实施例更加优选或优越。 Described herein as "exemplary" is not necessarily any embodiment to be regarded as preferred over other embodiments more or advantageous.

[0019] 图1示出了具有服务多个用户终端(UT)120的单个接入点(AP)110的示例性的WLAN 100。 [0019] Figure 1 illustrates an exemplary WLAN 100 having a plurality of service user terminal (UT) a single access point (AP) 120 110. 接入点110是装备有可以用于数据发送和接收的多个天线的多天线站。 Access point 110 is equipped with a multi-antenna station may transmit data for a plurality of antennas and received. 接入点也可以被称作基站、节点B或一些其它术语。 Access point may also be referred to as a base station, Node B, or some other terminology. 每个用户终端120可以配备有单个天线或多个天线。 Each user terminal 120 may be equipped with a single antenna or multiple antennas. 用户终端也可以被称作移动台、用户设备、无线设备或一些其它术语。 The user terminal may also be called a mobile station, user equipment, wireless device, or some other terminology.

[0020] 接入点110可以向多天线用户终端发送多输入多输出(MIMO)传输或者向单天线用户终端发送多输入单输出(MISO)传输。 [0020] The access point 110 may transmit terminal multiple input multiple output (MIMO) transmission to a user or a multi-antenna transmitting multiple input single output (MISO) transmission to single-antenna user terminal. 接入点110还可以接收来自多天线用户终端的MIMO传输或者来自单天线用户终端的单输入多输出(SIMO)传输。 The access point 110 may also receive a MIMO transmission from multi-antenna user terminal or from a single-antenna user terminal, single input multiple output (SIMO) transmission. 由发射器处的多个(NT)发射天线和接收器处的多个(NR)接收天线形成的MIMO信道可以被分解为NS个空间信道,其中NS≤min{NT,NR}。 A plurality (NR) transmit antennas and a receiver at a plurality of (NT) at the transmitter receive antennas MIMO channel may be decomposed into NS spatial channels, wherein NS≤min {NT, NR}. 可以使用NS个空间信道来并行地发送数据以获得更高吞吐量和/或冗余地发送数据以获得更大的可靠性。 Data may be transmitted in parallel using the NS spatial channels to achieve higher throughput and / or redundantly to achieve greater data transmission reliability. 由多个发射天线和单个接收天线形成的MISO信道由单个空间信道组成。 MISO channel formed by the multiple transmit antennas and a single receive antenna by a single spatial channel. 可以使用多个发射天线来以改善可靠性的方式发送数据。 Can transmit data to improve reliability manner using a plurality of transmit antennas. 由单个发射天线和多个接收天线形成的SIMO信道也由单个空间信道组成。 SIMO channel transmit antennas and multiple reception antennas is also formed by a single composed of a single spatial channel. 可以使用多个接收天线来以改善可靠性的方式接收数据。 A plurality of receive antennas may be used in a manner to improve the reliability of the received data.

[0021] 接入点110可以是固定站并且可以设置在WLAN部署区域内的任何位置,其中WLAN部署区域可以是建筑物、建筑物的一层、住宅、办公综合体、商店等。 [0021] The access point 110 may be a fixed station and may be disposed anywhere within the area of ​​deployment of the WLAN, WLAN deployment region which may be a building, floor of a building, residential, office complex, shops and the like. 用户终端120可以遍及WLAN部署区域分布。 The user terminal 120 may be distributed throughout the area WLAN deployment. 一些用户终端(例如,用户终端120c和120d)可以位于靠近接入点110的位置,而一些其它用户终端(例如,用户终端120a和120b)可以位于远离接入点110的位置。 Some user terminals (e.g., user terminal 120c, and 120 d) may be located in a position close to the access point 110, and some other user terminals (e.g., user terminals 120a and 120b) may be located remote from the location 110 of the access point. 每个用户终端120可以是静止的或移动的。 Each user terminal 120 may be stationary or mobile. 典型地,在WLAN部署区域内存在着使在接入点110和用户终端120之间发送的RF信号劣化的障碍物(例如,墙壁)。 Typically, the deployment of the WLAN area in the memory so that the RF signal degradation obstacle access point 110 and user terminal 120 transmits (e.g., a wall). 还可能存在着也可以使RF信号劣化的其它非自然信号(例如,干扰)。 There may also be other artifacts may be made of the RF signal degradation (e.g., interference). 为简单起见,在图1中没有示出这些障碍物和非自然信号。 For simplicity, in FIG. 1 does not show these obstacles and artifacts.

[0022] 为了向所有或许多用户终端120提供良好性能,接入点110的多个天线遍及WLAN部署区域分布。 [0022] In order to provide good performance for all or many user terminals 120, access point 110 of the plurality of antennas distributed throughout the area WLAN deployment. 接入点110具有安装在接入点上或靠近接入点安装的L个本地天线112a至1121。 The access point 110 has mounted on or near an access point of the access point installation local antenna 112a to the L 1121. 通常,L可以是零、1或大于1,即,L≥0。 Typically, L may be zero, 1 or greater than 1, i.e., L≥0. 接入点110还具有位于遍及WLAN部署区域的不同位置的M个远程天线114a至114m。 The access point 110 also has a WLAN deployed at different locations throughout the area of ​​the remote antenna 114a to M 114m. 远程天线114可以设置在距离接入点110的不同距离处,相对于接入点110的不同角位置处,等等。 Remote antenna 114 may be disposed at different distances from the access point 110, the access point 110 with respect to different angular positions, and the like. 通常,M是1或更大,即,M≥1。 Typically, M is 1 or greater, i.e., M≥1. 可供接入点110使用的本地和远程天线的总数是Nap,Nap=L+M≥2。 The total number of local and remote antenna for the access point 110 is used Nap, Nap = L + M≥2.

[0023] 各种类型的天线可以被用作本地天线112和远程天线114,它们也被称作接入点(AP)天线。 [0023] Various types of antenna may be used as a local antenna 112 and remote antenna 114, which are also referred to as an access point (AP) antenna. 例如,每个AP天线可以是交叉极天线、偶极天线、片状天线(patch antenna)(或芯片)等。 For example, each AP antenna may be a cross-pole antenna, a dipole antenna, a patch antenna (patch antenna) (or chip). 天线也可以被称作天线元件、辐射元件等。 The antenna element may also be referred to as an antenna, radiating element and the like. 每个AP天线被设计成用于供WLAN 100使用的工作频带。 Each AP antenna is designed to operate using a frequency band used for the WLAN 100. 每个AP天线还可以具有任何辐射图(radiationpattern)。 Each AP may also have any antenna radiation pattern (radiationpattern). 可以基于每个AP天线所打算的覆盖区域来选择该AP天线的天线类型和辐射图。 AP antenna may be selected based on the coverage area of ​​each AP antenna and the intended type of antenna radiation pattern. 例如,具有全向辐射图的天线可以被用作位于图1中WLAN部署区域中间附近的远程天线114d,具有定向辐射图的天线可以被用作位于WLAN部署区域角落处的远程天线114a、114c、114e和114n。 For example, it can be used with full antenna radiation pattern of the antenna positioned FIG WLAN deployment remote antenna 114d near the intermediate region, having a directional radiation pattern of the antenna 1 can be used as a remote WLAN deployment areas located at the corners 114a, 114c, 114e and 114n.

[0024] 对于图1中所示的实施例来说,每个远程天线114连接到各自的远程前端(remote front-end RFE)116,其对经由该远程天线发射和接收的RF信号执行信号调节(例如,放大、滤波等)。 [0024] For the embodiment shown in Figure 1, each remote antenna 114 is connected to a respective distal end remote (remote front-end RFE) 116, which regulates the RF signal transmitted and received via the remote antenna signal is performed (e.g., amplifies, filters, etc.). 下面将描述远程前端116的几个实施例。 Several remote tip end 116 will be described below embodiments. 用于每个远程天线114的远程前端116经由电缆118连接到接入点110。 For each of the remote front end 116 remote antenna 114 is connected to access point 110 via a cable 118. 电缆118可以是通常用于有线电视的同轴电缆或者可以是支持用于WLAN 100的工作频带的某种其它类型的电缆。 Cable 118 may be a commonly used coaxial cable or may be used to support WLAN 100 operating band of some other type of cable. 还可以用其它类型的通信链路(例如,RF、红外等)来替换电缆118。 Also possible to use other types of communication links (e.g., RF, infrared, etc.) to replace the cable 118. 远程前端116可以减少由于电缆118所造成的信号损失并因此可以改善性能。 The front end of the remote signal 116 may be reduced due to the loss caused by the cable 118 and thus may improve performance. 通常,对于每个远程天线114,可以或可以不使用远程前端116。 Typically, for each remote antenna 114, you may or may not use the remote front end 116.

[0025] 可以以各种方式来布置和选择用于接入点110的本地和远程天线。 [0025] and may be arranged to select an antenna for both local and remote access point 110 in various ways. 下面将描述本地和远程天线的几个示例性配置。 Local and remote will be described several exemplary antenna configurations. 下面还将描述用于选择天线来进行数据发送的几个示例性实施例。 The following will also be described for selecting antennas for several exemplary embodiments of the data transmission.

[0026] 图2A示出了没有本地天线但具有多个(M>1)远程天线114a至114m的接入点110a。 [0026] FIG 2A shows a local antenna but not having a plurality (M> 1) antennas 114a through 114m remote access point 110a. 接入点110a是图1中接入点110的一个实施例,并且具有可用于数据发送和接收的Nap=M个天线。 The access point 110a is an access point a in FIG. 1 embodiment 110 of the embodiment, and may be used with Nap transmit and receive data = M antennas. 每个远程天线114经由相关联的远程前端116和电缆118连接到接入点110a。 Each remote antenna 114 is connected to the access point 110a via the associated remote front end 116 and cable 118. 对于图2A中所示的实施例来说,每个远程天线114连接到接入点110a内各自的功率检测器(Power Det)290。 For the embodiment shown in FIG. 2A, each remote antenna 114 is connected to an access point within a respective power detector 110a (Power Det) 290. 每个功率检测器290测量由相关联的天线接收的RF信号的功率并向控制器220提供功率测量值。 Each RF signal power detector 290 measures received power by the associated antenna to the controller 220 to provide power measurements. 控制器220使用来自所有功率检测器290的功率测量值来选择用于数据发送和接收的天线。 The controller 220 uses all the power from the power measure detector 290 selects an antenna for transmitting and receiving data.

[0027] 图2B示出了具有单个(L=1)本地天线112和多个(M>1)远程天线114a至114m的接入点110b。 [0027] FIG 2B shows a (L = 1) 112 and a plurality of local antennas (M> 1) remote antenna 110b having a single access point 114a to 114m of. 接入点110b是图1中接入点110的另一实施例,并且具有可用于数据发送和接收的Nap=M+1个天线。 The access point 110b in FIG. 1 is an access point 110 in another embodiment, and has for transmitting and receiving data Nap = M + 1 antennas. 对于图2B中所示的实施例来说,M+1个天线中的每个连接到接入点110内的各自的功率检测器290。 For the embodiment shown in FIG. 2B for, M + 1 antennas each connected to a respective power detector 290 within the access point 110. 控制器220接收来自所有功率检测器290的功率测量值并选择用于数据发送和接收的天线。 The controller 220 receives all of the power from the power measure detector 290 and selects an antenna for transmitting and receiving data.

[0028] 图2C示出了具有多个(L>1)本地天线112a至1121和多个(M>1)远程天线114a至114m的接入点110c。 [0028] FIG 2C shows a plurality (L> 1) 1121 to the local antenna 112a and a plurality (M> 1) remote antenna access point 114a to 110c having the 114m. 接入点110c是图1中接入点110的又一实施例,并且具有可用于数据发送和接收的Nap=L+M个天线。 Access point 110c in FIG. 1 is an access point 110 in a further embodiment, and with Nap = L + M antennas may be used to send and receive data. 通常,L可以或可以不等于M。 Typically, L may or may not be equal to M.

[0029] 对于图2A至2C中所示的实施例来说,在接入点处可用的Nap个天线中的每个可以单独地被选择用于数据发送和/或接收。 [0029] For the embodiment shown in FIGS. 2A 2C is in, available at the access point in each of the Nap antennas may be individually selected for data transmission and / or reception. 控制器220可以选择一个天线、可用天线的子集或所有可用天线以用于向给定用户终端进行数据发送和/或从给定用户终端进行数据接收。 The controller 220 may select one antenna, or a subset of the available antennas to all of the available antennas for data transmission and / or reception of data from a given user terminal to a given user terminal. 控制器220可以基于可用天线的功率测量值来选择天线,如下所述。 The controller 220 may select an antenna based on power measurements available antennas, as described below.

[0030] 图2D示出了具有多个(M>1)本地天线112a至112m和多个(M)远程天线114a至114m的接入点110d。 [0030] FIG 2D shows 112a to 112m and a plurality (M) of remote antenna access point 110d having a plurality (M> 1) of the local antenna 114a to 114m. 接入点110d是图1中接入点110的又一实施例,并且具有可用于数据发送和接收的Nap=2M个天线。 Access point 110d in FIG. 1 is an access point 110 in another embodiment, and can be used with Nap transmit and receive data = 2M antennas. 对于图2D中所示的实施例来说,每个本地天线112与一个远程天线114相关联。 For the embodiment shown in FIG. 2D, each local antenna 112 and antenna 114 associated with a remote. 利用M个本地天线112和M个远程天线114来形成M对天线。 M is formed by using the M antenna and the local antenna 112 M remote antenna 114. 在一个实施例中,控制器220选择一个或多个天线对以用于向给定用户终端进行数据发送,并例如基于每个所选的对中的两个天线的功率测量值来进一步选择该对中的一个天线。 In one embodiment, the controller 220 selects one or more antennas to transmit data to a given user terminal for, for example, and the further selected based on the power measurement value of each of the two selected antennas a pair of antennas.

[0031] WLAN 100可以施加这样的约束:至多N个天线可以用于数据发送,其中N可以等于二、四或某个其它值。 [0031] WLAN 100 may be applied to the constraint that: up to N antennas can be used for data transmission, where N may be equal to two, four, or some other value. WLAN 100还可以支持多个传输模式。 WLAN 100 may also support multiple transmission modes. 每个传输模式可以要求某个最小数目的天线或特定数目的天线以用于使用该传输模式的数据传输,如下所述。 Each transmission mode may require a certain minimum number of antennas or number of antennas for data transmission using the transmission mode, as described below. 为简单起见,下面的描述假定接入点110可以选择多达N个天线来向给定用户终端进行数据发送。 For simplicity, the following description assumes that access point 110 can select up to N antennas for a given user terminal to a data transmission. 接入点110还基于所选天线的数目来选择将用于数据传输的传输模式。 Access point 110 further based on the number of selected antennas to select a transmission mode for data transmission. 接入点110可以以各种方式来选择天线以向用户终端进行数据发送。 The access point 110 may be selected in various manners for the antenna transmits data to the user terminal.

[0032] 在一个实施例中,接入点110选择具有最高功率测量值的N个天线以用于向用户终端进行数据发送,其中N<Nap。 [0032] In one embodiment, the access point 110 selects an antenna having the N highest power values ​​measured at the user terminal for data transmission, where N <Nap. 对于在图2A至2C中所示的实施例来说,接入点110接收Nap个可用天线的功率测量值,对功率测量值进行排序(例如,从最高到最低),并选择具有N个最高功率测量值的N个天线。 In respect to the embodiment shown in FIG. 2A 2C, the access point 110 receives the Nap antennas available power measurement, power measurement values ​​are sorted (e.g., from highest to lowest), and selecting the N highest N antenna power measurements. 对于图2D中所示的实施例来说,接入点110基于功率测量值来选择N个最佳天线对并选择每对中两个天线中的较好者。 For the embodiment shown in FIG. 2D, the access point 110 based on the power measurements to select the N best two antennas each pair of antennas and are preferably selected.

[0033] 在另一实施例中,接入点110选择具有超过预定功率阈值Pth的功率测量值的多达N个天线。 [0033] In embodiments, the access point 110 to select up to N antennas having power measure exceeds a predetermined threshold power Pth in another embodiment. 接入点110可以把每个天线的功率测量值与功率阈值相比较,如果其功率测量值超过功率阈值那么保留该天线,否则丢弃该天线。 The access point 110 may measure the power of each value is compared with the antenna power threshold, the power if the measured value exceeds the power threshold then the antenna retained, otherwise, discard the antenna. 如果多于N个天线具有超过功率阈值的功率测量值,那么接入点110选择N个最佳天线。 If more than N antenna having a power measured value exceeds the power threshold, the access point 110 selects N best antennas. 如果少于N个天线的功率测量值超过功率阈值,那么接入点110可以只选择这些天线。 If fewer than N antennas power measure exceeds the power threshold, the access point 110 may select only those antennas. 如果没有天线具有超过功率阈值的功率测量值,那么接入点110可以选择最佳可用天线或预定数目个最佳天线。 If no antenna having a power measured value exceeds the power threshold, the access point 110 may select the best antenna can be used or a predetermined number of best antenna.

[0034] 在又一实施例中,接入点110最初选择具有最高功率测量值的N个最佳天线,然后丢弃对向用户终端的数据发送只有小贡献的所有天线。 [0034] In yet another embodiment, access point 110 initially selects N best antenna having the highest power measurements, then discarding all antennas transmit only a small contribution to the data to the user terminal. 可以如下所述实现该天线修剪。 The antenna can be implemented below the trim. 接入点110基于N个最佳天线的功率测量值来对它们进行排序,例如从对于N个天线来说的最高功率测量值P1到最低功率测量值PN。 The access point 110 based on the power measurements of the N best antennas to sort them, for example, the lowest power value P1 to the measurement value from the highest power PN measured for N of antennas. 然后接入点110计算每两个相邻排序的天线i和i+1之间的功率间隙ΔPi作为它们的功率测量值的差,或者ΔPi=Pi-Pi+1,i=1,...,N-1。 Then the access point 110 calculates each two adjacent sorted antenna i and i + 1 ΔPi power gap between power measurements as their difference or ΔPi = Pi-Pi + 1, i = 1, ... , N-1. 接入点110接下来确定任何天线对的功率间隙ΔPi是否超过预定量ΔPth,或者是否ΔPi>ΔPth,i=1,...,N-1。 The access point 110 next determines whether the power of the gap of any antenna exceeds a predetermined amount Delta] Pi ΔPth, or whether ΔPi> ΔPth, i = 1, ..., N-1. 如果给定天线j的功率间隙ΔPj超过预定量,那么接入点110丢弃功率测量值为Pi+1或更低的所有天线。 If a given antenna j gap ΔPj power exceeds a predetermined amount, the access point 110 discards all power measurement value Pi + 1 antennas or less. 该实施例去除了对被发送到用户终端的数据传输只有小贡献的天线,这减少了在天线之间的串扰。 This embodiment removes only a small contribution to the antenna is transmitted to the user terminal for data transmission, which reduces the crosstalk between the antennas.

[0035] 上述实施例用于基于在接入点110处可用的功率测量值来进行天线选择。 [0035] The above-described embodiment for performing antenna selection based on available power at the access point 110 measurements. 接入点110可以基于代替接收功率的其它参数,或者除了基于接收功率之外还基于其它参数来选择天线。 The access point 110 may be based on other parameters received power instead of or in addition to the received power is further based on other parameters selected antenna. 例如,接入点110可以基于以下参数来选择天线:(1)接收的信号噪声比(SNR),其是期望信号(例如,导频)与总噪声和干扰的比值,(2)接收到的信号强度,其是期望信号与总接收功率的比值,或(3)接收信号质量的某种其它指示。 For example, the access point 110 may be selected based on the following parameters of the antenna: (1) the received signal to noise ratio (the SNR), which is the ratio of the desired signal to the total interference and noise (e.g., pilot), (2) received signal strength, which is the ratio of the total received signal power of a desired, or (3) some other indication of received signal quality. 在下面的描述中,天线测量值可以指适合于用来选择天线的任何类型的测量值(例如,功率、SNR、信号强度等)。 In the following description, the antenna may refer to measurements adapted to measure the value (e.g., power, SNR, signal strength, etc.) of any type is used to select the antenna.

[0036] 接入点110也可以基于可为天线获得的其它信息来选择天线。 [0036] The access point 110 may be based on other information may be obtained by selecting an antenna of the antenna. 在一个实施例中,接入点110基于本地和远程天线的位置信息来选择天线。 In one embodiment, the access location information based on local and remote antenna 110 to select an antenna points. 每个天线可以与一组一个或多个附近天线相关联。 Each antenna may be associated with a set of one or more nearby antennas. 该位置信息可以存储在数据库中。 The location information may be stored in a database. 如果对于给定天线获得了高功率测量值,那么接入点110可以选择已知位于该天线附近的一个或多个其它天线。 If a high-power measured values ​​obtained for a given antenna, the access point 110 may select one or more other known antennas located close to the antenna. 例如,如果对于图1中的远程天线114a来说获得了高功率测量值,那么接入点110可以选择天线114b和/或天线114d以用于向用户终端进行数据发送。 For example, if a high value for the power measurement in FIG. 1 for remote antenna 114a, then the access point 110 may select the antenna 114b and / or 114d antennas for data transmission to the user terminal.

[0037] 在另一实施例中,接入点110基于本地和远程天线的位置信息来选择天线。 Selecting an antenna in the embodiment, the access point location information based on the local and remote antenna 110 [0037] In another embodiment. 如果本地和远程天线的位置以及用户终端的位置是已知的,那么接入点110可以选择位于用户终端附近的一个或多个天线。 If the position of the user terminal and the local and remote antennas is known, the access point 110 may select a user terminal located in the vicinity of one or more antennas. AP天线的位置可以在部署期间查明并提供。 AP antenna location can be identified and provided during deployment. 用户终端的位置可以经由测量值来近似和/或以其它方式来查明。 Position of the user terminal may be approximated by the measured values ​​and / or be otherwise identified.

[0038] 在又一实施例中,接入点110基于本地和远程天线的相关性信息来选择天线。 [0038] In yet another embodiment, the access point 110 based on the local and remote antenna correlation information to select an antenna. 一些天线可以具有高相关性,这在这些天线之间导致过多的串扰以及差的空间分离。 Some antenna may have a high correlation, which leads to excessive crosstalk, and spatial difference between these separated antennas. 因此,具有高相关性的天线不应该被一起选择。 Thus, the antenna having a high correlation should not be selected together. 可用天线的相关性信息可以基于天线的安置、类型和/或测量值来查明。 Antenna correlation information may be based on available placement, type and / or measurements to identify the antenna. 例如,本地天线112由于它们的紧密间隔而会具有高相关性,并且优选的是仅选择一个或一些本地天线来用于数据传输。 For example, due to their local antenna 112 will be closely spaced and have a high correlation, and it is preferable to select only one or some of the local antennas for data transmission.

[0039] 接入点110还可以基于从协议栈中位于物理层上方的更高层获得的信息来选择天线。 [0039] Access point 110 may also be located based on information obtained from higher layers above the physical layer of the protocol stack from the selected antenna. 接入点110典型地向用户终端以分组发送数据。 The access point to the terminal 110 typically transmits the packet data to the user. 该用户终端可以针对正确解码的每个分组发送回确认(ACK),并针对错误解码的每个分组发送回否定确认(NAK)。 The user terminal may send back an acknowledgment for each packet decoded correctly (ACK), and sent back for each packet decoded in error negative acknowledgment (NAK). 接入点110可以最初例如基于功率测量值来选择一组天线以用于向用户终端进行数据发送。 The access point 110 may initially be based on the power measurements, for example, to select a set of antennas for data transmission to the user terminal. 如果大百分比的分组被错误地解码,那么接入点110可以选择不同的天线组来用于向用户终端进行数据发送。 If a large percentage of the packet is decoded in error, then the access point 110 may select a different antenna groups for data transmission to the user terminal.

[0040] 接入点110可以以其它方式选择天线来用于向用户终端进行数据发送,并且这在本发明的范围内。 [0040] The access point 110 may select an antenna in other ways for data transmission to the user terminal, and within the scope of this invention. 接入点110可以基于任何标准或任何标准组合来选择天线。 The access point 110 may be based on any criteria or any combination of criteria to select the antenna.

[0041] 接入点110可以选择不同的天线组来用于向不同的用户终端进行数据发送,例如基于这些用户终端的测量值。 [0041] The access point 110 may choose to different antenna groups for transmitting data to a different user terminal, for example, based on measurements of these user terminals. 接入点110可以在向用户终端进行数据发送之前获得每个用户终端的测量值,并可以基于这些测量值来选择用于用户终端的一组天线。 Each access point 110 can obtain the measured value of the user terminal prior to sending the data to the user terminal, and based on these measurements a set of antennas is selected for the user terminal. 这允许接入点110对每个数据传输都使用最佳的天线组。 This allows the access point 110 for each data transfer is to use the best antenna set.

[0042] 接入点110可以把为每个用户终端选择的天线组存储在查找表中。 [0042] The access point 110 may be stored in the antenna set selected for each user terminal in the lookup table. 该天线组可以借助用户终端的标识符来编入索引。 The antenna group may be a terminal identifier of the user by means of indexing. 该标识符可以是接入点110在通信会话开始时分配给用户终端的媒体接入控制标识符(MAC ID)或者可以是某种其它类型的标识符。 The access point 110 may be an identifier assigned to the user terminal when the communication session starts medium access control identifier (MAC ID) or may be some other type of identifier. 表1示出了用于图1所示的实例中的用户终端120a至120d的示例性查找表。 Table 1 shows an exemplary lookup table for the example of a user terminal shown in FIG. 1 of 120a to 120d.

[0043] 表1 [0043] TABLE 1

[0044] [0044]

[0045] 接入点110在开始向用户终端进行数据发送时可能还没有给定用户终端的任何测量值。 [0045] The access point 110 at the beginning of the data sent to the user terminal may not measure any values ​​given user terminal. 然后接入点110可以利用用户终端的MAC ID来访问查找表并取回先前为用户终端选择的天线组。 Then the access point 110 may utilize the user terminal MAC ID to access the lookup table and retrieves the previous antenna set selected for the user terminal. 接入点110可以使用该先前选择的天线组向用户终端发送数据直到例如利用新的测量值更新了该组为止。 The access point 110 may use the previously selected antenna set to the user terminal transmits data by using, for example, until a new measurement updated values ​​of the set up.

[0046] 接入点110选择第一组T个天线来用于向用户终端进行下行链路数据传输,并选择第二组R个天线来用于从用户终端接收上行链路数据传输。 [0046] The access point 110 selects a first group of the T antennas for downlink data transmission to the user terminal, and selecting a second set for the R antennas to the user terminal receives the uplink data transmission. 通常,N≥T≥1,N≥R≥1,并且T可以或可以不等于R。 Typically, N≥T≥1, N≥R≥1, and may or may not be equal to T R. R也可以大于N,如果得到接入点110处的空间处理支持的话,但是为了简单起见下面并没有描述这种可能性。 R may also be greater than N, to obtain the space 110 if the access point processing to support it, but for simplicity this possibility is not described below. 发射天线的数目(T)取决于可用于下行链路数据传输的良好天线的数目、由接入点110用于下行链路数据传输的传输模式以及可能的其它因素。 Number (T) depends on the number of transmit antennas can be used to good antenna downlink data transmission, the transmission mode by the access point for downlink data transmission 110 and possibly other factors. 如果天线通过一个或多个选择标准,例如如果其功率测量值超过功率阈值,那么该天线可以被认为是良好的。 If the antenna through one or more selection criteria, such as the power if the measured value exceeds the threshold power, then the antenna may be considered good. 接收天线的数目(R)取决于可用于上行链路数据接收的良好天线的数目、由用户终端用于上行链路数据传输的传输模式以及可能的其它因素。 The number (R) receive antennas can be used depending on well-antenna uplink data received by the user terminal for transmitting uplink data transmission mode, and possibly other factors.

[0047] 接入点110可以如上所述选择第一组T个发射天线并且还可以以类似方式选择第二组R个接收天线。 [0047] The access point 110 may select the first group of the T transmit antennas may also be selected as described above and a second set of R receive antennas in a similar manner. 第一组天线可以与第二组天线相同或不同。 The first set of antennas may be the same or different from the second group of antennas. 可以通过使用单组天线来既用于数据发送也用于数据接收来简化接入点110处的处理。 It may be used for both data transmission by using a single set of antennas used for data reception processing 110 to simplify the access point. 在这种情况下,每个所选天线既被用于向用户终端发送RF信号也被用于从用户终端接收RF信号。 In this case, each of the selected antenna is used for both transmitting RF signals to the user terminals are also used to receive RF signals from the user terminal.

[0048] 图3示出了由接入点110执行用来向用户终端发送数据以及从用户终端接收数据的处理300。 [0048] FIG. 3 shows a terminal for transmitting data to the user by the access point 110 and performs data processing 300 received from the user terminal. 例如基于由用户终端发送的导频,在接入点110处为本地和远程天线获得测量值(流程块310)。 For example, by the user terminal based on the pilot transmitted, obtaining measurements (block 310) the local and remote antennas at the access point 110. 测量值可以是针对所接收的功率和/或一些其它参数。 Value may be measured for the received power and / or some other parameters. 基于测量值和/或其它信息从在接入点110处可用的Nap个天线中选择第一组一个或多个(T)发射天线,其中Nap>N≥T≥1(流程块312)。 Based on measurements and / or other information to select the first set of one or more (T) at the access point 110, Nap antennas available at the transmit antennas, from where Nap> N≥T≥1 (process block 312). 如上所述,可以以各种方式执行天线选择。 As described above, antenna selection can be performed in various manners. 如果没有任何测量值可用,那么上一次用于向用户终端进行数据发送的那组天线可以从查找表中取回并被用于当前的下行链路数据传输。 If no measurements are available, then the last set of antennas for data transmission to the user terminal may be retrieved from a lookup table and a current downlink data transmission. 基于所选的发射天线的数目来为向用户终端进行的数据传输选择传输模式。 Selecting a transmission mode for the transmission of data to the user terminal based on the number of selected transmit antennas.

[0049] 还基于测量值和/或其它信息从在接入点110处可用的Nap个天线中选择第二组一个或多个(R)接收天线,其中Nap≥N≥R≥1(流程块314)。 [0049] Also based on measurements and / or other information receiving antenna selecting a second set of one or more (R) at the access point 110 available from Nap antennas, wherein Nap≥N≥R≥1 (process block 314). 例如取决于用于下行链路和上行链路数据传输的传输模式,第一和第二组可以具有相同或不同数目的天线。 For example, depending on the transmission mode for downlink and uplink data transmission, the first and second sets may have the same or a different number of antennas. 即使R=T,第二组也可以包含与第一组中的天线相同或不同的天线。 Even if R = T, the second group may contain the same or different in the first group of antennas the antenna.

[0050] 接入点110根据所选的用于下行链路的传输模式来处理数据(流程块316),然后把所处理的数据从第一组T个天线发送到用户终端(流程块318)。 [0050] The access point 110 to process the data (block 316) in accordance with the selected transmission modes for the downlink, and the processed data transmitted from the first group of T antennas to the user terminal (block 318) . 接入点110经由第二组R个天线从用户终端接收上行链路数据传输(流程块320)。 The access point 110 via the second group R antennas from user terminal receives the uplink data transmission (block 320).

[0051] 返回来参照图1,接入点110可以服务WLAN 100内的多个用户终端120。 [0051] Referring back to FIG. 1, the access point 110 may serve a plurality of users within 100 WLAN terminal 120. 每个用户终端120可以要求特定一组发射天线以获得良好的下行链路性能并要求特定一组接收天线以获得良好的上行链路性能。 Each user terminal 120 can request a particular set of transmit antennas to achieve good and downlink performance requirements of a particular set of receiving antennas in order to obtain a good uplink performance. 接入点110可以在用于不同用户终端的不同天线组之间动态地进行切换,使得利用为每个用户终端提供良好性能的那组发射/接收天线来服务该用户终端。 Access point 110 may dynamically switch between different antenna groups for different user terminals, so that good performance is provided by using each user terminal set of transmit / receive antennas serving the subscriber terminal. 接入点110处的电子设备可以被设计成具有(例如,基于每数据分组或基于每帧)迅速地切换到用于不同用户终端的不同天线组的能力。 Electronic device 110 at the access point may be designed to have (e.g., on a per data packet basis or per frame) ability to rapidly switch to a different antenna groups for different user terminals.

[0052] 图4示出了接入点110的实施例。 [0052] FIG 4 illustrates an embodiment of access point 110. 对于该实施例来说,接入点110包括执行数字处理的数字部210、对N个天线的RF和基带信号执行信号调节的N个收发器230a至230n、以及把N个收发器230连接到N个天线的RF开关280,其中N个天线从在接入点110处可用的Nap个天线中选择。 For this embodiment, the access point 110 comprises a digital processing unit performing digital 210, the N antenna RF and baseband signals performs the signal conditioning N transceivers 230a to 230N, the N and the transceiver 230 is connected to the the RF switch 280 N antennas, where N antenna selection from the access point 110 Nap antennas are available.

[0053] 每个收发器230包括发射器单元(TMTR)240和接收器单元(RCVR)260。 [0053] Each transceiver 230 includes a transmitter unit (TMTR) 240 and a receiver unit (RCVR) 260. 发射器和接收器单元可以利用超外差(super-heterodyne)架构或直接转换架构来实现。 The transmitter and receiver may utilize a super-heterodyne unit (super-heterodyne) architecture or a direct-conversion architecture is achieved. 对于超外差架构来说,RF和基带之间的频率转换是在多个级中执行的,例如在一个级中从RF到中间频率(IF),以及在另一级中从IF到基带。 For the super-heterodyne architecture, a frequency conversion between RF and baseband is performed in multiple stages, in one example, from RF to an intermediate frequency stage (IF), and in another stage from IF to baseband. 对于直接转换架构来说,频率转换是在单个级中执行的,例如直接从RF到基带。 For the direct-conversion architecture, a frequency conversion is performed in a single stage, e.g., from RF directly to baseband. 为了简单起见,图4示出了利用直接转换架构实现的发射器单元240和接收器单元260的实施例。 For simplicity, FIG. 4 shows an embodiment of using a direct conversion architecture implementation transmitter unit 240 and receiver unit 260.

[0054] 在发射器单元240内,数模转换器(DAC)242从数字部210接收数字码片流,把该码片转换为模拟的,并提供模拟基带信号。 [0054] Within transmitter unit 240, a digital to analog converter (DAC) 242 from the digital section 210 receives a digital stream of chips, the chip which is converted to analog, and provides an analog baseband signal. 然后滤波器244对模拟基带信号进行滤波以去除由数模转换产生的不希望有的图像并提供滤波后的基带信号。 Then filter 244 pairs the analog baseband signal is filtered to remove generated by the digital-analog conversion and provides undesirable images filtered baseband signal. 放大器(Amp)246放大并缓冲滤波后的基带信号并提供放大后的基带信号。 Amplifiers (Amp) 246 amplifies and buffers the filtered baseband signal and provides an amplified baseband signal. 混频器248利用放大后的基带信号调制来自压控振荡器(VCO)(图4中未示出)的TX_LO载波信号并提供上转换信号。 The mixer 248 modulates the baseband signals using amplified from a voltage controlled oscillator (the VCO) (not shown in FIG. 4) of the carrier signal and to provide the TX_LO signal conversion. 功率放大器(PA)250放大上转换信号并向RF开关280提供RF调制信号。 The power amplifier (PA) 250 amplifies the converted signal to the RF switch 280 provides an RF modulated signal.

[0055] 对于发送路径来说,RF开关280从N个收发器230a至230n中的发射器单元240接收多达N个RF调制信号。 [0055] For the transmit path is, RF switch 280 receives up to N number of RF modulated signals from transceivers N transmitter units 230a to 230n 240. RF开关280还接收Ant_Sel控制信号,该Ant_Sel控制信号指示哪个收发器将被连接到哪个AP天线。 Ant_Sel RF switch 280 also receives a control signal, which control signal indicates the Ant_Sel transceiver which AP will be connected to the antenna. RF开关280把每个接收的RF调制信号路由到所选的本地天线112或用于所选的远程天线114的远程前端116。 RF switch 280 routes each received RF modulated signal to a selected local antenna 112 for remote or distal end 116 of the selected remote antenna 114. 对于接收路径来说,RF开关单元280从被选择用于数据接收的每个本地天线112和每个远程天线114接收RF输入信号。 For the receive path is, the switching unit 280 receives the RF signal from the RF input is selected for data reception in each local antenna 112 and each of the remote antenna 114. RF开关单元280把每个接收的RF输入信号路由到指定的收发器230内的接收器单元260。 RF switching unit 280 routes each received RF input signal to transceiver 230 within the specified receiver unit 260. RF开关单元280可以利用发射/接收(T/R)开关、双工器等来实现,如本领域中已知的那样。 RF switching unit 280 may utilize transmit / receive (T / R) switch, and a duplexer implemented as known in the art as. RF开关单元280避免了在接入点110处为Nap个天线中的每个都提供独立的收发器230的需要。 RF switching unit 280 avoids the need for the Nap access point antennas 110 are provided independently of each transceiver 230.

[0056] 在接收器单元260内,低噪声放大器(LNA)262从RF开关280接收所选的AP天线的RF输入信号。 [0056] Within receiver unit 260, a low noise amplifier (LNA) RF input signal 280 to receive the selected AP antenna switch 262 from RF. LNA 262放大所接收的RF信号并提供具有期望的信号电平的调节后的RF信号。 LNA 262 amplifies the received RF signal and provides a conditioned RF signal having a desired signal level of. 混频器264利用来自VCO的RX_LO信号来解调调节后的RF信号并提供下转换信号。 The mixer 264 using the RX_LO signal from the VCO to demodulate the RF signal and provides the conditioned signal down conversion. 滤波器266对下转换信号进行滤波以使所期望的信号分量通过并去除可能由频率下转换处理产生的噪声和不希望有的信号。 Down-conversion filter to filter signal 266 so that a desired signal component and may be removed by the frequency conversion process to produce noise and undesired signals. 放大器268放大并缓冲滤波后的信号并提供模拟基带信号。 Amplifier 268 amplifies and buffers the filtered signal and provides an analog baseband signal. 模数转换器(ADC)270使模拟基带信号数字化并向数字部210提供采样流。 Analog to digital converter (ADC) 270 so that the digitized analog baseband signal to the digital portion 210 provides a sample stream.

[0057] 对于图4中所示的实施例来说,接收器单元260内的功率检测器290从LNA 262接收调节后的RF信号,测量调节后的RF信号中的接收功率,并向数字部210内的主控制器220提供功率测量值。 [0057] For the embodiment shown in FIG. 4, a power detector unit 260 within the receiver 290 receives the conditioned signal from the RF LNA 262, the received power of the RF signal measured in the regulation, and the digital portion 210 the main controller 220 provides power measurements. 功率检测器290还可以基于基带信号(例如,在滤波器266或放大器268之后)来测量接收功率。 Further power detector 290 (e.g., after the filter 266 or amplifier 268) can be used to measure the received power based on the baseband signal. 可以以各种方式来实现功率检测器290,如本领域中已知的那样。 It may be implemented in various ways power detector 290, as known in the art as.

[0058] 图4示出了用于发射器和接收器单元的示例性设计。 [0058] FIG 4 illustrates an exemplary design of a transmitter and a receiver unit. 通常,发射器和接收器单元均可以包括一级或多级的放大器、滤波器、混频器等,其可以与图4中所示的配置不同地来进行布置。 Typically, the transmitter and receiver units may each include one or more stages of amplifier, filter, mixer, etc., which may be arranged differently from the configuration shown in FIG. 4. 发射器和接收器单元还可以包括图4中未示出的不同的和/或附加的元件。 The transmitter and receiver unit may further include views of different and / or additional element 4 is not shown.

[0059] 图4还示出了包括执行用于数据发送和接收的数字处理的各种处理单元的数字部210的实施例。 [0059] FIG. 4 shows a further embodiment of a digital portion 210 includes performing a process for transmitting and receiving digital data of various processing units. 在数字部210内,数据处理器212执行编码、交织和符号映射以用于数据发送并执行符号解映射、解交织和解码以用于数据接收。 In the digital portion 210, the data processor 212 performs coding, interleaving, and symbol mapping for data and performing transmission symbol demaps, deinterleaves, and decodes the data for reception. 空间处理器214执行发射器空间处理(例如,用于波束形成、本征操纵(eigensteering)等)以用于进行数据发送,并执行接收器空间处理(例如,空间匹配滤波)以用于进行数据接收,如下所述。 Spatial processor 214 performs transmitter spatial processing (e.g., for beamforming, eigen manipulation (eigensteering) etc.) for data transmission, and the receiver performs spatial processing (e.g., spatial matched filter) for data receiving, as described below. 调制器216执行调制(例如,用于正交频分复用(OFDM))以用于进行数据发送。 Modulator 216 performs modulation (e.g., for orthogonal frequency-division multiplexing (the OFDM)) for data transmission. 解调器218执行解调(例如,用于OFDM)以用于进行数据接收。 The demodulator 218 performs demodulation (e.g., for OFDM) for data reception. 检测/获取单元224执行处理以检测并获取来自用户终端的信号。 Detection / acquisition unit 224 performs processing to detect and acquire signals from the user terminal. 主控制器220控制接入点110内各种处理单元的操作并产生对收发器230和远程前端116的控制。 220 controls operation of the access point within the main controller 110 and generates various processing unit 230 controls the transceiver 116 and the front end of the remote. 例如,主控制器220可以产生用于启用和禁用每个发射器单元230的Ti控制信号以及用于启用和禁用每个接收器单元260的Ri控制信号。 For example, the master controller 220 may generate Ti to enable and disable each transmitter unit 230 and a control signal for enabling and disabling each of the receiver unit 260 a control signal Ri. 功率控制器226执行对接入点110的功率管理。 Power controller 226 performs power management on the access point 110. 例如,功率控制器226可以确定是否向远程前端116发送DC功率。 For example, the power controller 226 may determine whether to transmit the DC power to the remote front end 116. 随机存取存储器(RAM)和只读存储器(ROM)222存储由数字部210内的各种处理单元使用的数据和程序代码。 A random access memory (RAM) and read only memory (ROM) 222 stores various processing units within digital section 210 data and program codes used. 例如,存储器222可以存储为每个用户终端选择的天线组。 For example, memory 222 may store each user terminal antenna group is selected.

[0060] 图5A示出了可以用作图1中所示的每个远程前端116的远程前端116x的实施例。 [0060] FIG. 5A illustrates an embodiment of a remote may be used as the front end 116x of Figure 1 in the front end 116 of each remote. 远程前端116x可以用于在不同时刻在相同频带上的下行链路和上行链路上发送数据的时分双工(TDD)通信系统。 Remote distal 116x may be used on different uplink and downlink time on the same frequency band in a time division duplex data transmission (TDD) communication system. 对于图5A中所示的实施例来说,远程前端116x包括开关510和540、功率放大器520、低噪声放大器530以及带通滤波器550。 For the embodiment shown in FIG. 5A, the remote switch 510 and a distal end comprising a 116x 540, amplifier 520, low noise amplifier 530 and a band-pass filter 550. 开关510和540接收指示RF信号是正被接入点110发射还是接收的发射/接收(T/R)控制信号。 Switches 510 and 540 receives the signal RF indicating the access point 110 is being emitted or received by the transmit / receive (T / R) control signal. 每个开关按照T/R控制信号的指示,在发射部分期间将其输入连接到“T”输出,并在接收部分期间将其输入连接到“R”输出。 Each switch in the indicated T / R control signal, during transmission section whose input is connected to the "T" output, and in the receiving section during which it is connected to the input "R" outputs. 主控制器220可以产生T/R控制信号并经由相关联的收发器230(图4中未示出)将该信号提供给每个远程前端116。 The main controller 220 may generate a T / R control signal to the front end 116 to each remote transceiver 230 via the signal associated (not shown in FIG. 4).

[0061] 对于发送路径来说,来自相关联的发射器单元240的RF调制信号经由第一端口被接收,经由开关510被路由,并由具有固定或可变增益的功率放大器520放大以获得所期望的输出信号电平。 [0061] For the transmit path, a transmitter unit from the associated RF modulated signal 240 is received via the first port, is routed via a switch 510, by a fixed or variable gain amplifier 520 is amplified to obtain a desired output signal level. 来自功率放大器520的放大信号经由开关540被路由,由滤波器550滤波以去除带外噪声和不希望有的信号分量,并经由第二端口被提供给相关联的远程天线114。 Amplifies the signal from the power amplifier 520 is routed via a switch 540, a filter 550 with filtered to remove noise and any undesirable signal components, and a second port is provided to an associated antenna 114 via the remote. 对于接收路径来说,来自相关联的远程天线114的RF输入信号经由第二端口被接收,由滤波器550滤波以去除带外噪声和不希望有的信号分量,经由开关540被路由,并由具有固定或可变增益的LNA 530放大。 For the receive path, the remote antenna from an associated RF input signal 114 is received via a second port by the filter 550 with filtered to remove noise and unwanted signal components, are routed via the switch 540, by LNA 530 having a fixed or variable gain amplifier. 来自LNA 530的放大信号经由开关510被路由并经由第一端口被提供给相关联的接收器单元260。 The amplified signal from the LNA 530 is routed via the first port associated with the receiver unit 260 is supplied to the switch 510 via.

[0062] 功率放大器520和/或LNA 530可以在任何可能的时候被下电以减少功率消耗。 [0062] The power amplifier 520 and / or LNA 530 may be powered down at any time possible to reduce power consumption. 例如,T/R控制信号可以在接收部分期间使功率放大器520下电,并在发射部分期间使LNA 530下电。 For example, T / R control signal may cause the power amplifier 520 during the receiving portion, and so that during the emission portion 530 is electrically LNA. RF信号、T/R控制信号和DC功率可以由接入点110经由电缆118或通过其它手段提供给远程前端116x。 RF signal, T / R control signal and the DC power from the access point 110 may be a cable 118 or by other means provided to the front end via a remote 116x.

[0063] 图5B示出了也可以用作图1中所示的每个远程前端116的远程前端116y的实施例。 [0063] FIG. 5B illustrates an embodiment of a remote may be used as the front end 116y of FIG. 1 in the front end 116 of each remote. 远程前端116y可以用于在不同的频带上同时在下行链路和上行链路上发送数据的频分双工(FDD)通信系统。 Remote distal 116y may be used in different frequency bands simultaneously transmit data frequency division duplex (FDD) communication system on the downlink and uplink. 对于图5B中所示的实施例来说,远程前端116y包括双工器512和542、功率放大器520以及LNA 530。 For the embodiment shown in FIG. 5B, the remote tip end 116y includes a duplexer 512 and 542, power amplifiers 520 and LNA 530.

[0064] 对于发送路径来说,来自相关联的发射器单元240的RF调制信号经由第一端口被接收,由双工器512滤波,被路由到功率放大器520,利用增益被放大以获得所期望的输出信号电平,由双工器542滤波,并经由第二端口提供给相关联的远程天线114。 [0064] For the transmit path, a transmitter unit from the associated RF modulated signal 240 is received via a first port, a duplexer filter 512, is routed to the power amplifier 520, it is amplified by the gain to obtain the desired the output signal level, a duplexer filter 542, a second port is provided to an associated antenna 114 and via a remote. 对于接收路径来说,来自相关联的天线114的RF输入信号经由第二端口被接收,由双工器542滤波,被路由到LNA 530,利用增益被放大,由双工器512滤波,并经由第一端口提供给相关联的接收器单元260。 For the receive path is, the RF input signal from an associated antenna 114 is received via a second port, a duplexer filter 542, is routed to the LNA 530, it is amplified by the gain, filtered by the duplexer 512, via the first port is provided to an associated receiver unit 260. 对于远程前端116y来说不需要T/R控制信号。 For remote tip end 116y is not required T / R control signal.

[0065] 图5A和5B分别示出了远程前端116x和116y的特定实施例。 [0065] Figures 5A and 5B show a distal end remote 116x and 116y of the specific embodiments. 通常,发送和接收路径均可以包括一级或多级的放大器、滤波器等。 Typically, transmit and receive paths may each include one or more stages of amplifier, filter or the like. 发送和接收路径还可以包括图5A和5B中未示出的更少的、不同的和/或附加的电路组块。 Transmit and receive paths may further comprise FIGS. 5A and 5B, not shown, fewer, different and / or additional circuit block.

[0066] 为了清楚起见,上面的描述示出了每个远程天线114被连接到相关联的远程前端116,并且每个收发器230处理用于一个AP天线的RF信号。 [0066] For clarity, the above description illustrates each of the remote antenna 114 is connected to a remote associated with the distal end 116, and each of the RF transceiver 230 processes a signal for AP antenna. 通常,每个远程前端116和/或每个收发器230可以与一组一个或多个天线元件相关联。 Typically, each of the remote front end 116 and / or each transceiver 230 may be associated with a set of one or more antenna elements. 如果远程前端或收发器与多个天线元件相关联,那么这些天线元件可以被视为用于远程前端或收发器的单个(分布式)“天线”。 If the remote transceiver front end or with a plurality of associated antenna elements, these elements can be considered as a single antenna (distributed) "antenna" for the front end or the remote transceiver.

[0067] 在WLAN 100中,“伪(dummy)”站可以遍及WLAN部署区域设置并用于各种功能,诸如系统配置、发射器和接收器电子设备的校准、天线选择等。 [0067] In the WLAN 100, a "dummy (dummy)" station may be provided over the WLAN deployment area and used for various functions, such as system configuration, transmitter and receiver electronics calibration, antenna selection. 这些伪站可以是具有基本MAC/PHY功能的便宜的站并且可以不需要常规站所需的所有软件。 These dummy station may be base station has inexpensive MAC / PHY functions and may not require any software required for conventional stations.

[0068] 每个伪站可以在指定的时刻或每当被接入点110指示时就发射训练/导频/试探(training/pilot/sounding)分组。 [0068] Each dummy station may or every time the access point 110 is indicative of transmit timing designated training / pilot / trial (training / pilot / sounding) packets. 接入点110可以使用训练分组来执行各种功能。 The access point 110 may use the training packets to perform various functions. 例如,接入点110可以基于训练分组来校准收发器230a至230n内的发射器单元240和接收器单元260的频率响应以及远程前端116a至116m的频率响应。 For example, the access point 110 may respond based on the training packet to calibrate the frequency of the transceiver 230a-230n within the transmitter unit 240 and receiver unit 260 and the frequency response of the remote front end 116a to 116m. 如果伪站处于已知位置,那么接入点110可以查明由远程天线114观察的信道质量并可以使用信道质量信息来用于天线选择。 If the position of the dummy station is known, then the access point 110 may identify the channel quality observed by the remote antenna 114 and may use the channel quality information for antenna selection.

[0069] 用于使用伪站的示例性情况可以如下所述。 [0069] An exemplary case of using the dummy station may be as follows. 伪站可以设置在关键地方而位于覆盖区域的入口和出口,例如位于具有许多隔间和办公室的大办公综合体的入口处。 Pseudo station can be set up in key places and positioned to cover the inlet and outlet areas, such as at the entrance to a large office complex with many compartments and offices. 每个伪站可以向接入点发射训练分组,所述接入点可以处理这些训练分组并构造用于该伪站的发射和接收本征矢量。 Each station may transmit a pseudo training packet to the access point, the access point may process the training packets and configured for transmitting and receiving pseudo eigen vector of the station. 当新站在主动呼叫(active call)已经处于进行中的状态下进入该办公综合体时,新站到接入点的切换可以通过使用来自最接近的伪站的预先计算的本征矢量而得到简化,其中最接近的伪站可以基于信号强度测量值来识别。 Upon entering the office complex at the new active call stand (active call) state already in progress, the new station to the access point switching can be obtained by using the eigenvectors calculated in advance from the closest pseudo station simplified, which is closest to the dummy station can be identified based on signal strength measurements. 这可以使切换更平滑且更快速。 This allows smoother and more rapid switching. 最终,逐个分组的传输将使得能够为新站导出更优的本征矢量,但是伪站会提供合理的起始点。 Finally, the transmission of a packet by packet to the new station would enable deriving eigenvectors better, but the dummy station will provide a reasonable starting point.

[0070] WLAN 100可以支持多个传输模式,诸如无操纵(no steering)、波束操纵(beamsteering)、本征操纵(eigensteering)、空间-时间发射分集(STTD)、空间-频率发射分集(SFTD)等。 [0070] WLAN 100 may support multiple transmission modes, such as a no manipulation (no steering), beam steering (beamsteering), intrinsic manipulation (eigensteering), space - time transmit diversity (the STTD), space - frequency transmit diversity (SFTD) Wait. 表2为每个传输模式列出了用于数据发送的天线数目和用于数据接收的天线数目。 Table 2 lists the number of antennas used for data transmission and the number of antennas for data reception for each transmission mode. Nap是在接入点处可用的天线总数,并且Nut是调度为用于下行链路和上行链路数据传输的在用户终端处可用的天线总数。 Nap is the total number of antennas available at the access point and Nut is the total number of antennas is scheduled for downlink and uplink data transmission is available at the user terminal. 在表2和下面的描述中,对于每个传输模式来说,T是由接入点用来向使用该传输模式的用户终端进行下行链路数据传输的天线数目,N是由WLAN允许用于下行链路和上行链路上的数据传输的天线的最大数目,并且Sdn是由接入点向用户终端同时发送的数据流的数目,其中Sdn≤min{N,Nut}并且Nap>N。 In Table 2 and the following description, for each transmission mode is, T is the number used by the access point antennas for downlink data transmission to the user terminal using the transmission mode, N being allowed for by the WLAN the maximum number of data streams is the number of antennas for data transmission on the downlink and uplink, and a terminal Sdn simultaneously sent to the user by the access point, wherein Sdn≤min {N, Nut} and Nap> N. 对于每个传输模式来说,R是由接入点用来接收由使用该传输模式的用户终端发送的上行链路数据传输的天线数目,并且Sup是由用户终端向接入点同时发送的数据流的数目。 For each transmission mode is, R is the number used by the access point antennas receiving the uplink data transmission by the user terminal transmits the transmission mode, and Sup is simultaneously transmitted by the user terminal to the access point data the number of streams.

[0071] 表2 [0071] TABLE 2

[0072] [0072]

[0073] 相同的或不同的传输模式可以用于接入点和用户终端之间的下行链路和上行链路数据传输。 [0073] the same or different transmission modes may be used for downlink and uplink data transmission between the access point and user terminal. 接入点可以使用相同的或不同的天线组来用于下行链路数据发送和上行链路数据接收。 Access point may use the same or a different antenna groups for transmitting downlink data and receiving uplink data. 下面将描述接入点110为表2中列出的传输模式执行的空间处理。 Will be described below space 110 is the access point transmission mode in Table 2 are listed the processing performed.

[0074] 接入点110可以执行波束操纵来操纵朝特定用户终端x进行下行链路数据传输。 [0074] The access point 110 may be performed to manipulate the beam steering downlink data transmission towards a particular user terminal x. 用户终端x可以具有单个天线并且可以是图1中的用户终端120a或120c。 The user terminal may have a single antenna and x may be a user terminal in FIG. 1 120a or 120c. 接入点110从Nap个可用的天线中选择多个(T)天线来用于向用户终端x进行数据发送。 Selecting a plurality of access point 110 (T) of the antenna from Nap antennas available for data transmission to the user terminal x. 在接入点110处的T个所选天线和用户终端x处的单个天线之间形成了MISO信道。 T between the selected antenna and a single antenna at the user terminal 110 x access point MISO channel is formed. 对于每个子频带k,该MISO可以通过1×T的信道响应行矢量hdn,x(k)=[hx,1(k)hx,2(k)...hx,T(k)]来表征,其中hx,j(k)(j=1,...,T)是对于子频带k而言,AP天线j和单个UT天线之间的复信道增益。 For each subband k, which MISO may be characterized by a channel response row vector 1 × T hdn, x (k) = [hx, 1 (k) hx, 2 (k) ... hx, T (k)] wherein hx, j (k) (j = 1, ..., T) for subband k, the complex channel gain between antenna j and the single UT AP antenna. 接入点110可以如下所述执行用于波束形成的空间处理: The access point 110 may be formed as a spatial beam for performing the process:

[0075] [0075]

[0076] 其中sdn,x(k)是将在子频带k上发送到用户终端x的数据符号,xdn,x(k)是具有在接入点110处将从T个所选天线发送的T个发射符号的矢量,“H”表示共轭转置,并且K是用于数据传输的子频带数目。 [0076] where sdn, x (k) is the data transmitted to the user terminal symbol x in the subband k, xdn, x (k) is selected having the T transmit antennas at the access point 110 from the T vector of transmit symbols, "H" denotes a conjugate transpose, and K is the number of subbands used for data transmission.

[0077] 接入点110可以同时从多达N个天线向用户终端y发送Sdn数据流。 [0077] The access point 110 may simultaneously transmit the terminal y Sdn data stream to the user from the up to N antennas. 用户终端y具有多个(Nut)天线并且可以是图1中的用户终端120b或120d。 Y has a plurality of user terminals (Nut) antennas and may be a user terminal in FIG. 1 120b or 120d. 接入点110从Nap个可用的天线中选择多个(T)天线以用于向用户终端y进行下行链路数据发送,其中对于无操纵来说T=Sdn。 Selecting a plurality of access point 110 (T) antennas for data downlink to the user terminal y transmitted from Nap antennas available, in which no manipulation is for T = Sdn. 接入点110可以如下所述执行用于无操纵的空间处理: The access point 110 may be performed as described below for non-spatial processing manipulation:

[0078] xdn,ns,y(k)=sdn,y(k), for k∈{1,...,K},Eq(2) [0078] xdn, ns, y (k) = sdn, y (k), for k∈ {1, ..., K}, Eq (2)

[0079] 其中对于无操纵情况来说,sdn,y(k)是具有将在子频带k上发送到用户终端y的Sdn数据符号的矢量,并且xdn,ns,y(k)是具有将在子频带k上从T个所选天线发送到用户终端y的T个发送符号的矢量。 [0079] wherein for the case of no manipulation for, Sdn, y (k) is a vector having transmitted on subband k to terminal y is Sdn user data symbols, and xdn, ns, y (k) will be a transmitted on subband k from the T antennas to the selected vector of the user terminal y T transmit symbols.

[0080] 接入点110可以执行本征操纵以在正交空间信道(或本征模式(eigenmode))上向用户终端y发送多个数据流。 [0080] The access point 110 may be manipulated to perform intrinsic to the user terminal y on orthogonal spatial channel (or eigenmode (Eigenmode)) transmit multiple data streams. 在接入点110处的T个所选天线和用户终端y处的Nut个天线之间形成了MIMO信道。 Between the T and the selected antenna Nut antennas at user terminal y at the access point 110 form a MIMO channel. 对于子频带k而言,该MIMO可以通过Nut×T的信道响应矩阵Hdn,y(k)来表征,所述信道响应矩阵可以表示为: For subband k, the response of the MIMO channel by Nut × T matrix Hdn, y (k) to characterize the channel response matrix can be expressed as:

[0081] [0081]

[0082] 其中hy,i,j(k)(i=1,...,Nut并且j=1,...,T)是对于子频带k而言在接入点110处的天线j和用户终端y处的天线i之间的复信道增益。 [0082] where hy, i, j (k) (i = 1, ..., Nut and j = 1, ..., T) for subband k and j in terms of antennas at the access point 110 complex channel gain between user terminal antenna i at y. 信道响应矩阵Hdn,y(k)可以经由本征值分解而被对角化如下: Channel response matrix Hdn, y (k) can be decomposed by the eigenvalues ​​be diagonalized as follows:

[0083] [0083]

[0084] 其中Edn,y(k)是本征矢量的单位矩阵,并且Λy(k)是对于子频带k而言的本征值的对角矩阵。 [0084] wherein Edn, Y (k) are eigenvectors of the matrix, and [lambda] Y (k) is the eigenvalue for subband k in terms of the diagonal matrix. Λy(k)的对角元素是表示Hdn,y(k)的S个本征模式的功率增益的本征值,其中S≤min{T,Nut}。 Λy (k) is a diagonal elements Hdn, eigenvalue y (k) of the power gain of the S eigenmodes, where S≤min {T, Nut}. 本征模式可以被视为正交空间信道。 Eigenmodes may be viewed as orthogonal spatial channels. 接入点110可以使用Edn,y(k)中的本征矢量(或列)来在Hdn,y(k)的本征模式上发送数据。 The access point 110 may use Edn, the eigenvectors (or columns) y (k) to transmit data on Hdn, y (k) eigenmodes. 接入点110可以在Hdn,y(k)的S个本征模式上同时发送多达S个数据流,或者Sdn≤S。 The access point 110 may simultaneously transmit on Hdn, y (k) of up to S eigenmodes of S data streams, or Sdn≤S.

[0085] 接入点110可以如下所述执行用于本征操纵的空间处理: [0085] The access point 110 may be performed as described below for the intrinsic spatial manipulation process:

[0086] xdn,es,y(k)=Edn,y(k)·sdn,y(k),Eq (5) [0086] xdn, es, y (k) = Edn, y (k) · sdn, y (k), Eq (5)

[0087] 其中对于本征操纵来说,xdn,es,y(k)是具有将在子频带k上从T个所选天线发送到用户终端y的T个发送符号的矢量。 [0087] wherein for manipulation is intrinsic, xdn, es, y (k) is a vector having transmitting antennas selected from the T to the K subbands of T transmit symbol y is the user terminal. 接入点110还可以通过利用Hdn,y(k)的最佳本征模式的本征矢量执行用于波束操纵的空间处理来在该最佳本征模式上发送数据,例如如等式(1)所示。 Access point 110 can also utilize Hdn, eigen vector y (k) is the best eigenmode for performing spatial processing for beam steering transmit data on the best eigenmode, e.g. as shown in equation (1 ) shown in FIG.

[0088] 接入点110可以使用STTD或SFDT从两个天线向用户终端发送单个数据流。 [0088] The access point 110 may transmit a single data stream to a user terminal or from two antennas using STTD SFDT. 对于STTD来说,接入点110为每对数据符号s1和s2产生两个矢量xdn,td,1=[s1 s2]T和其中“*”表示复共轭并且“T”表示转置。 For STTD, the access point 110 for each pair of data symbols to generate two vectors s1 and s2 xdn, td, 1 = [s1 s2] T and where "*" denotes the complex conjugate and "T" denotes transpose. 接入点110在第一符号周期中在一个子频带上从两个所选天线发送矢量xdn,td,1中的两个编码符号,然后在第二符号周期中在相同的子频带上从相同的两个天线发送矢量xdn,td,2中的两个编码符号。 A sub-access point 110 in a first frequency band in the symbol period transmitted from two antennas selected vectors xdn, td, two encoded symbols 1, then in a second symbol period from the same subband in the same the two antenna transmission vectors xdn, td, two encoded symbols 2. 对于SFDT来说,接入点110在第一子频带上从两个所选天线发送矢量xdn,td,1中的两个编码符号并且在相同的符号周期中在第二子频带上发送矢量xdn,td,2中的两个编码符号。 For SFDT, the access point 110 on the first sub-band transmitted from two antennas selected vectors xdn, td, two encoded symbols and a second transmission vector XDN on subbands in the same symbol period , td, two encoded symbols 2.

[0089] 接入点110可以使用多个(R)天线来从用户终端接收上行链路数据传输。 [0089] The access point 110 may use multiple (R) antennas terminal receives uplink data transmission from the user. 接入点110从Nap个可用的天线中选择R个天线,其中R取决于由用户终端用来进行上行链路数据传输的传输模式,如表2所示。 110 selected from the Nap access point antennas available in R antennas, where R depending on the user terminal to transmit uplink data transmission mode, as shown in Table 2. 如果得到接入点处的空间处理的支持的话,那么R还可以大于N。 If supported spatial processing at the access point, then R may also be greater than N. 对于TDD系统来说,下行链路和上行链路可以被假定为互逆的,使得上行链路的信道响应等于下行链路的信道响应的转置,例如,并且 For a TDD system, the downlink and uplink may be assumed to be reciprocal, so that the channel response to transpose the uplink channel response is equal to the downlink, e.g., and

[0090] 对于来自单天线终端x的上行链路数据传输来说,在接入点110处接收的符号可以表示为: [0090] For uplink data transmission from single-antenna terminals of x, the received symbols at the access point 110 may be expressed as:

[0091] rup,x(k)=hup,x(k)·sup,x(k)+wup,x(k), Eq(6) [0091] rup, x (k) = hup, x (k) · sup, x (k) + wup, x (k), Eq (6)

[0092] 其中sup,x(k)是由用户终端x在子频带k上发送的数据符号,rup,x(k)是具有用户终端x的R个接收符号的矢量,并且wup,x(k)是接入点110处接收的噪声矢量。 [0092] wherein sup, x (k) of x by the user terminal data symbol transmitted on subband k, rup, x (k) is a vector having a user terminal x of R received symbols, and wup, x (k ) is the noise vector received by the access point 110.

[0093] 接入点110可以如下所述执行接收器匹配滤波: [0093] The access point 110 may be a receiver matched filtering following the execution:

[0094] [0094]

[0095] 其中 [0095] in which

是sup,x(k)的估计,并且wup,x(k)是由sup,x(k)观察的后处理噪声。 SUP is, estimate x (k), and the WUP, x (k) is the noise observed by workup sup, x (k).

[0096] 对于来自使用无操纵或本征操纵的多天线终端y的上行链路数据传输来说,在接入点110处接收的符号可以表示为: [0096] For uplink data transmission from the use of non-manipulate manipulation or intrinsic y of a multi-antenna terminal, the received symbols at the access point 110 may be expressed as:

[0097] rup,y(k)=Hup,y(k)·xup,y(k)+wup,y(k)=Heff,y(k)·sup,y(k)+wup,y(k),Eq(8) [0097] rup, y (k) = Hup, y (k) · xup, y (k) + wup, y (k) = Heff, y (k) · sup, y (k) + wup, y (k ), Eq (8)

[0098] 其中sup,y(k)是由用户终端y发送的数据符号的矢量,xup,y(k)是用户终端y处的Nut个天线的发送符号的矢量,Heff,y(k)是用于上行链路的有效信道响应矩阵,并且rup,y(k)是对于用户终端y来说在接入点110处接收的符号的矢量。 [0098] wherein sup, y (k) is a vector by a user terminal y data symbols transmitted, xup, y (k) is a vector of transmitted symbols Nut antennas of the user terminal at y, Heff, y (k) is effective channel response matrix for the uplink, and rup, y (k) y is a vector for the user terminal is received at the access point 110 symbols. Heff,y(k)取决于由用户终端y用于上行链路数据传输的传输模式,例如,如果用户终端y执行本征操纵那么Heff,y(k)=Hup,y(k)·Eup,y(k),并且如果用户终端y执行无操纵那么Heff,y(k)=Hup,y(k)。 Heff, y (k) y depending on the user terminal for transmitting uplink data transmission mode, e.g., if the user terminal y intrinsic manipulation performed so Heff, y (k) = Hup, y (k) · Eup, y (k), and if the user terminal performs no manipulation y then Heff, y (k) = Hup, y (k).

[0099] 接入点110可以如下所述执行接收器空间处理: [0099] The access point 110 may perform receiver spatial following process:

[0100] [0100]

[0101] 其中Mup,y(k)是对于子频带k而言的空间滤波器矩阵,并且 [0101] wherein Mup, y (k) for subband k in terms of the spatial filter matrix, and

是后检测噪声。 After detecting noise. 接入点110可以使用以下等式中的任何一个来导出空间滤波器矩阵Mup,y(k): Access point 110 can use any of the following equation to derive the spatial filter matrix Mup, y (k):

[0102] [0102]

[0103] [0103]

[0104] [0104]

[0105] 其中,Dy(k)=[diag[M′up,y3(k)·Heff,y(k)]]-1, [0105] wherein, Dy (k) = [diag [M'up, y3 (k) · Heff, y (k)]] - 1,

[0106] [0106]

[0107] I是单位矩阵,并且σn2是接入点110处的噪声的方差。 [0107] I is a unit matrix, and σn2 is the variance of the noise 110 at the access point. 等式(10)用于本征操纵的匹配滤波技术,等式(11)用于迫零(zero-forcing)技术,并且等式(12)用于最小均方误差(MMSE)技术。 Matched filtering equation (10) for intrinsically manipulation, equation (11) for zero-forcing (zero-forcing) technique, and equation (12) for the minimum mean square error (MMSE) technique. 追零和MMSE技术可以用于无操纵和本征操纵传输模式。 MMSE and zero recovery techniques may be used to manipulate non-transmission mode and the intrinsic manipulation.

[0108] 对于来自使用STTD的多天线终端y的上行链路数据传输来说,在接入点110处接收的符号可以表示为: [0108] For uplink data transmission from multi-antenna terminals using STTD of the y, the received symbols at the access point 110 may be expressed as:

[0109] rup,td,y1(k)=hup,ya1(k)·sy1(k)+hup,ya2(k)·sy2(k)+wup,y1(k),and Eq(13) [0109] rup, td, y1 (k) = hup, ya1 (k) · sy1 (k) + hup, ya2 (k) · sy2 (k) + wup, y1 (k), and Eq (13)

[0110] [0110]

[0111] 其中sy1(k)和sy2(k)是使用STTD在子频带k上在两个符号周期内从两个UT天线y1和y2发送的两个数据符号,hup,yG1(k)和hup,ya2(k)分别是在两个UT天线y1和y2之间的信道增益的矢量,并且R是所选的AP天线,rup,td,y1(k)和rup,td,y2(k)是在两个符号周期内对于子频带k来说的接收符号的矢量,并且wup,y1(k)和wup,y2(k)是两个符号周期的噪声矢量。 [0111] wherein SY1 (k) and SY2 (k) is the use of two data symbol STTD on subband k UT transmitted from two antennas y1 and y2 in two symbol periods, hup, yG1 (k) and hup , ya2 (k) are the vectors of the channel gain between the two antennas UT y1 and y2, and R is selected AP antenna, rup, td, y1 (k) and rup, td, y2 (k) is for subband k is a vector of received symbols in two symbol periods, and wup, y1 (k) and wup, y2 (k) is the noise vector two symbol periods. 对于STTD和SFTD传输模式来说,R≥1。 For STTD transmission mode and for SFTD, R≥1.

[0112] 接入点110可以如下所述导出两个数据符号sy1(k)和sy2(k)的估计: [0112] The access point 110 may derive the following two data symbols sy1 (k) and sy2 (k) of the estimate:

[0113] 并且 [0113] and

[0114] [0114]

[0115] 其中 [0115] in which

with

分别是sy1(k)和sy2(k)的估计,并且 They are sy1 (k) and sy2 (k) of the estimate, and

with

分别是由sy1(k)和sy2(k)观察的后处理噪声。 After treatment were observed by the noise sy1 (k) and sy2 (k).

[0116] 本文中所描述的多天线站可以通过各种装置来实现。 [0116] Multi-station antennas described herein may be implemented by various means. 例如,本文中所描述的多天线站和任何功能可以利用硬件、固件或软件的组合来实现。 For example, the multi-antenna station and any of the functions described herein may be implemented using a combination of hardware, firmware or software. 用于对AP天线进行测量、选择用于数据发送和接收的天线以及处理数据和信号的单元可以在一个或多个专用集成电路(ASIC)、数字信号处理器(DSP)、数字信号处理器件(DSPD)、可编程逻辑器件(PLD)、现场可编程门阵列(EPGA)、处理器、控制器、微控制器、微处理器、RF集成电路(RFIC)、设计成用于执行本文中描述的功能的其它电子单元或其组合内实现。 AP antenna for measuring selected for data transmission and reception antenna and a unit for processing data and signals may be in one or more application specific integrated circuits (ASIC), a digital signal processor (DSP), digital signal processing devices ( DSPDs), programmable logic devices (PLD), field programmable gate arrays (EPGA), processors, controllers, micro-controllers, microprocessors, the RF integrated circuit (an RFIC), designed as described herein for performing other electronic units, or to achieve a combination of functions.

[0117] 可以利用硬件或软件来执行天线选择。 [0117] hardware or software may be utilized to perform antenna selection. 对于软件实现方案来说,可以利用执行本文中描述的功能的模块(例如,程序、功能等)来执行天线选择。 For a software implementation, the functions may be implemented with modules described herein (e.g., procedures, functions, etc.) to perform antenna selection. 软件代码可以存储在存储器单元(例如,图4中的存储器单元222)中并由处理器(例如,控制器220)执行。 The software codes may be stored in a memory unit (e.g., in the memory unit 222 in FIG. 4) and executed by a processor (e.g., controller 220) performed. 存储器单元可以在处理器内部或在处理器外部实现,在处理器外部实现的情况下,存储器单元可以经由本领域中已知的各种装置被可通信地连接到处理器。 The memory unit may be implemented or external to the processor within the processor, the processor in the case of an external implementation, the memory unit may be communicatively connected to the processor via various means known in the art.

[0118] 对所公开的实施例的上述说明,是为了使本领域的任何专业技术人员能够实现或使用本发明。 [0118] The above description of the disclosed embodiments is provided to enable any person skilled in the technical art to make or use the present invention. 对这些实施例的多种修改对本领域的专业技术人员来说将是显而易见的,本文中所定义的一般原理可以在不脱离本发明的精神或范围的情况下,应用于其它实施例。 Various modifications to these professionals skilled in the art of the present embodiments will be apparent, and the generic principles defined herein may be made without departing from the spirit or scope of the present invention, it applied to other embodiments. 因此,本发明不应被限制于本文所示的这些实施例,而是要符合与本文所公开的原理和新颖特征一致的最宽的范围。 Accordingly, the present invention should not be limited to the embodiments shown herein, but is to be accorded herein consistent with the principles and novel features disclosed widest scope.

Claims (36)

1.一种多天线站,包括: 1. A multi-station antenna, comprising:
多个天线,其被连接到所述多天线站并且包括远离所述多天线站的至少一个远程天线; A plurality of antennas, which is connected to the multi-antenna comprises at least one remote station and the antenna away from the multi-antenna station;
控制器,用于从所述多个天线中选择一组一个或多个天线以用于向终端进行数据发送;和 A controller for selecting a set of one or more antennas from the plurality of antennas for transmitting data to the terminal; and
至少一个发射器单元,用于经由所述一组一个或多个天线向所述终端发送数据。 At least one transmitter unit for transmitting data to the terminal via a set of one or more of the antennas.
2.如权利要求1所述的多天线站,其中所述控制器获得所述多个天线的测量值并基于所述测量值来选择所述一组一个或多个天线。 The multi-antenna station according to claim 1, wherein said controller obtains a measured value of the plurality of antennas and selecting a set of one or more of the antennas based on the measured value.
3.如权利要求1所述的多天线站,进一步包括: Multi-antenna station according to claim 1, further comprising:
至少一个功率检测器,用于测量在所述多个天线处接收的功率并提供所述多个天线的功率测量值。 At least one power detector for measuring the received power of the plurality of antennas and provide power measurements of said plurality of antennas.
4.如权利要求3所述的多天线站,其中所述控制器在所述多个天线中选择具有最高功率测量值的预定数目个天线。 4. The multi-antenna station according to claim 3, wherein said controller selects a predetermined number of antennas having the highest power measurements at the plurality of antennas.
5.如权利要求3所述的多天线站,其中所述控制器选择具有高于预定功率阈值的功率测量值的天线。 The multi-antenna station according to claim 3, wherein the controller selects the antenna having the power measurement values ​​greater than the predetermined power threshold.
6.如权利要求1所述的多天线站,其中所述控制器基于所述多个天线的已知位置来选择所述一组一个或多个天线。 The multi-antenna station according to claim 1, wherein said controller of said plurality of antennas based on known locations to select a set of one or more of said antennas.
7.如权利要求1所述的多天线站,其中所述控制器基于所述多个天线的位置信息来选择所述一组一个或多个天线。 The multi-antenna station according to claim 1, wherein said controller based on the position information of the plurality of antennas to the selected set of one or more antennas.
8.如权利要求1所述的多天线站,其中所述控制器基于所述一组一个或多个天线中的天线数目来从多个被支持的传输模式中选择传输模式,所选择的传输模式用于向所述终端进行数据发送。 8. The multi-antenna station according to claim 1, wherein said controller is based on a number of antennas of the set of one or more antennas to be supported from a plurality of transmission modes selected transmission mode, the selected transmission mode is used for data transmission to the terminal.
9.如权利要求1所述的多天线站,进一步包括: 9. The multi-antenna station according to claim 1, further comprising:
存储单元,用于存储用于所述终端的所述一组一个或多个天线并提供所述一组一个或多个天线以用于向所述终端进行的随后的数据传输。 A storage unit for storing the set for the terminal and one or more antennas to provide a set of one or more of said antennas for subsequent data transmission to the terminal.
10.如权利要求1所述的多天线站,其中所述控制器进一步从所述多个天线中选择第二组一个或多个天线以用于从所述终端接收上行链路传输。 10. The multi-antenna station according to claim 1, wherein said controller further selects a second set of one or more antennas from the plurality of antennas for receiving an uplink transmission from the terminal.
11.如权利要求10所述的多天线站,其中所述控制器基于由所述终端用来进行上行链路传输的传输模式,来选择所述第二组一个或多个天线。 11. The multi-antenna station of claim 10, wherein said controller based on a transmission mode by the terminal used for uplink transmission, selecting the second set of one or more antennas.
12.如权利要求10所述的多天线站,其中所述控制器选择用于向所述终端进行数据发送的所述一组一个或多个天线作为用于从所述终端接收上行链路传输的所述第二组一个或多个天线。 12. The multi-antenna station of claim 10, wherein the controller selects the terminal for transmitting data to the set of one or more antennas as receiving an uplink transmission from the terminal to link the second set of one or more antennas.
13.如权利要求10所述的多天线站,进一步包括: 13. The multi-antenna station of claim 10, further comprising:
至少一个接收器单元,用于经由所述第二组一个或多个天线从所述终端接收上行链路传输。 At least one receiver unit, via a second set of one or more of the antennas receive an uplink transmission from the terminal.
14.如权利要求1所述的多天线站,进一步包括: 14. The multi-antenna station according to claim 1, further comprising:
连接到所述至少一个远程天线的至少一个远程前端,每个远程前端对经由相关联的远程天线发射和接收的无线电频率(RF)信号执行信号调节。 At least one remote front end connected to the at least one remote antennas, each remote signal conditioning front end for performing transmission and reception via an antenna associated with a remote radio frequency (RF) signals.
15.如权利要求1所述的多天线站,进一步包括: 15. The multi-antenna station according to claim 1, further comprising:
无线电频率(RF)开关,用于把所述至少一个发射器单元连接到所述多个天线。 Radio frequency (RF) switch for connecting the at least one transmitter unit to the plurality of antennas.
16.如权利要求1所述的多天线站,其中所述多个天线包括至少两个远程天线,所述至少两个远程天线远离所述多天线站并且被分布在所述多天线站的覆盖区域内。 16. The multi-antenna station according to claim 1, wherein said plurality of antennas comprises at least two remote antenna, said at least two remote antenna away from the multi-antenna station and is distributed in the multi-antenna station coverage within the area.
17.如权利要求1所述的多天线站,其中所述多个天线中的至少两个天线具有不同的辐射图。 17. The multi-antenna station according to claim 1, wherein the at least two antennas having different radiation patterns of the plurality of antennas.
18.一种发送数据的方法,包括: 18. A method of transmitting data, comprising:
从多个天线中选择一组一个或多个天线以用于从多天线站向终端进行数据发送,其中所述多个天线包括远离所述多天线站的至少一个远程天线;和 Selecting a set of one or more antennas from the plurality of antennas for data from a plurality of transmitting antennas to a terminal station, wherein said plurality of antennas comprises at least one remote antenna away from the multi-antenna station; and
经由所述一组一个或多个天线向所述终端发送数据。 Transmitting data to the terminal via a set of one or more of the antennas.
19.如权利要求18所述的方法,进一步包括: 19. The method as claimed in claim 18, further comprising:
获得所述多个天线的测量值。 Obtaining the plurality of measurements of the antenna.
20.如权利要求19所述的方法,其中选择所述一组一个或多个天线的步骤包括 20. The method according to claim 19, wherein said selecting a set of one or more antennas comprises the step of
在所述多个天线中选择具有最高测量值的预定数目个天线。 Selecting a predetermined number of antennas with the highest values ​​measured at the plurality of antennas.
21.如权利要求19所述的方法,其中选择所述一组一个或多个天线的步骤包括 21. The method according to claim 19, wherein said selecting a set of one or more antennas comprises the step of
选择具有高于预定阈值的测量值的天线。 Selecting an antenna having a measured value above a predetermined threshold value.
22.如权利要求18所述的方法,其中选择所述一组一个或多个天线的步骤包括 22. The method according to claim 18, wherein said selecting a set of one or more antennas comprises the step of
基于所述多个天线的位置信息来选择所述一组一个或多个天线。 Based on the position information of the plurality of antennas to the selected set of one or more antennas.
23.如权利要求18所述的方法,进一步包括: 23. The method as claimed in claim 18, further comprising:
存储用于所述终端的所述一组一个或多个天线;和 The terminal stores the set of one or a plurality of antennas; and
使用所存储的所述一组一个或多个天线来用于向所述终端进行的随后的数据发送。 Using the stored set of one or more of said antennas for subsequent data transmission to the terminal.
24.如权利要求18所述的方法,进一步包括: 24. A method as claimed in claim 18, further comprising:
从所述多个天线中选择第二组一个或多个天线以用于从所述终端接收上行链路传输;和 Selecting a second set of one or more antennas from the plurality of antennas for receiving an uplink transmission from the terminal; and
经由所述第二组一个或多个天线来接收所述上行链路传输。 Via the second set of one or more antennas to receive the uplink transmission.
25.一种设备,包括: 25. An apparatus, comprising:
用于从多个天线中选择一组一个或多个天线以用于向终端进行数据发送的装置,其中所述多个天线包括远离所述设备的至少一个远程天线;和 For selecting a set of one or more antennas from the plurality of antennas to the apparatus for transmitting data to a terminal, wherein the plurality of antennas comprises at least one remote antenna away from the device; and
用于经由所述一组一个或多个天线向所述终端发送数据的装置。 Means for transmitting data to the terminal via a set of one or more of the antennas used.
26.如权利要求25所述的设备,进一步包括: 26. The apparatus according to claim 25, further comprising:
用于获得所述多个天线的测量值的装置。 Means for measuring values ​​of said plurality of antennas is obtained.
27.如权利要求26所述的设备,其中用于选择所述一组一个或多个天线的装置包括 27. The apparatus according to claim 26, wherein said means for selecting a set of one or more antennas comprises
用于在所述多个天线中选择具有最高测量值的预定数目个天线的装置。 Means for selecting a predetermined number of antennas with the highest values ​​measured at the plurality of antennas.
28.如权利要求26所述的设备,其中用于选择所述一组一个或多个天线的装置包括 28. The apparatus according to claim 26, wherein said means for selecting a set of one or more antennas comprises
用于选择具有高于预定阈值的测量值的天线的装置。 Antenna means having a measured value above a predetermined threshold value for selecting.
29.如权利要求25所述的设备,进一步包括: 29. The apparatus according to claim 25, further comprising:
用于存储用于所述终端的所述一组一个或多个天线的装置;和 Means for storing a set of the terminal device or a plurality of antennas; and
用于使用所存储的所述一组一个或多个天线来用于向所述终端进行的随后的数据发送的装置。 Using said stored for a set of one or more antennas to the means for transmitting subsequent data to the terminal.
30.如权利要求25所述的设备,进一步包括: 30. The apparatus according to claim 25, further comprising:
用于从所述多个天线中选择第二组一个或多个天线以用于从所述终端接收上行链路传输的装置;和 A means for receiving an uplink transmission from the terminal selecting a second set of one or more antennas from the plurality of antennas; and
用于经由所述第二组一个或多个天线来接收所述上行链路传输的装置。 Means for receiving the uplink transmission via the second set of one or more antennas.
31.一种包括用于发送数据的指令的计算机可读介质,所述指令包括: 31. A computer comprising instructions for transmitting data readable medium, the instructions comprising:
用于从多个天线中选择一组一个或多个天线以用于从多天线站向终端进行数据发送的指令,其中所述多个天线包括远离所述多天线站的至少一个远程天线;和 For selecting a set of one or more antennas from the plurality of antennas to the at least one remote antenna for instruction data transmitted from a terminal station to a multi-antenna, wherein the antenna comprises a plurality of multi-antenna remote from the station; and
用于经由所述一组一个或多个天线向所述终端发送数据的指令。 Instructions for transmitting data to the terminal via a set of one or more of the antennas.
32.如权利要求31所述的计算机可读介质,进一步包括用于获得所述多个天线的测量值的指令。 The computer-readable medium according to claim 32. 31, further comprising a plurality of instructions for obtaining the measured values ​​for the antenna.
33.如权利要求32所述的计算机可读介质,其中用于选择所述一组一个或多个天线的指令包括用于在所述多个天线中选择具有最高测量值的预定数目个天线的指令。 33. The computer-readable medium according to claim 32, wherein the plurality of antennas or instructions comprises selecting the plurality of antennas having the highest measurement value of a predetermined number of antennas used for selecting a group of one of the instruction.
34.如权利要求32所述的计算机可读介质,其中用于选择所述一组一个或多个天线的指令包括用于选择具有高于预定阈值的测量值的天线的指令。 32 34. The computer-readable medium as claimed in claim, wherein the instruction set of one or more antennas for selecting comprises means for selecting an instruction having a measured value above a predetermined threshold value of the antenna.
35.如权利要求31所述的计算机可读介质,其中用于选择所述一组一个或多个天线的指令包括用于基于所述多个天线的位置信息来选择所述一组一个或多个天线的指令。 35. The computer-readable medium according to claim 31, wherein the one or more antennas of the set of instructions for selecting comprises a plurality of the antennas based on location information to select a set of one or more of the instructions antennas.
36.如权利要求31所述的计算机可读介质,进一步包括用于从所述多个天线中选择第二组一个或多个天线以用于从所述终端接收上行链路传输的指令;和 36. The computer-readable medium of claim 31, further comprising means for selecting a second set of one or more antennas from the plurality of antennas for uplink transmission instruction received from the terminal; and
用于在所述多个天线中选择具有最高测量值的预定数目个天线的指令。 Instructions for selecting a predetermined number of antennas with the highest values ​​measured at the plurality of antennas.
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