公开(公告)号：JP2011188507A

公开(公告)日：2011-09-22

申请号：JP2011091000

申请日：2011-04-15

Applicant: Qualcomm Inc ,  クゥアルコム・インコーポレイテッドQualcomm Incorporated

Inventor： WALLACE MARK S ,  WALTON JAY RODNEY ,  HOWARD STEVEN J

IPC: H04J99/00 ,  H04B7/04 ,  H04B7/08

CPC classification number: H04B7/0417 ,  H04B7/0626 ,  H04B7/0697 ,  H04B7/0854

Abstract: PROBLEM TO BE SOLVED: To efficiently perform spatial processing for improving characteristics in a multiple input multiple output system. SOLUTION: A first spatial filter matrix for a first transmission span is derived, a first initial spatial filter matrix for a second transmission span is determined on the basis of the first spatial filter matrix, a second spatial filter matrix for the second transmission span is derived on the basis of the first initial spatial filter matrix, thereby deriving spatial filter matrices in a wireless MIMO communication system. COPYRIGHT: (C)2011,JPO&INPIT

Abstract translation: 要解决的问题：为了有效地执行用于改善多输入多输出系统中的特性的空间处理。 导出用于第一传输跨度的第一空间滤波器矩阵，基于第一空间滤波器矩阵确定用于第二传输跨度的第一初始空间滤波器矩阵，用于第二传输的第二空间滤波器矩阵 跨度是基于第一初始空间滤波器矩阵导出的，从而导出无线MIMO通信系统中的空间滤波器矩阵。 版权所有（C）2011，JPO＆INPIT

公开(公告)号：JP2011050063A

公开(公告)日：2011-03-10

申请号：JP2010210828

申请日：2010-09-21

Applicant: Qualcomm Inc ,  クゥアルコム・インコーポレイテッドQualcomm Incorporated

Inventor： WALLACE MARK ,  KETCHUM JOHN W ,  WALTON J RODNEY ,  HOWARD STEVEN J

IPC: H04J99/00 ,  H04B7/005 ,  H04B7/04 ,  H04B7/06 ,  H04B7/08 ,  H04J11/00 ,  H04L1/00 ,  H04L1/06 ,  H04L1/08 ,  H04L1/16 ,  H04L5/14 ,  H04L5/16 ,  H04L12/28 ,  H04L12/56 ,  H04L25/02 ,  H04L25/03 ,  H04L27/26

CPC classification number: H04B7/0421 ,  H04B7/0615 ,  H04B7/0619 ,  H04B7/0669 ,  H04B7/0697 ,  H04B7/0854 ,  H04B17/336 ,  H04L1/00 ,  H04L1/0001 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0017 ,  H04L1/0059 ,  H04L1/0061 ,  H04L1/0068 ,  H04L1/0071 ,  H04L1/06 ,  H04L1/0618 ,  H04L1/08 ,  H04L1/16 ,  H04L5/1469 ,  H04L25/0224 ,  H04L25/0226 ,  H04L25/0242 ,  H04L25/03006 ,  H04L25/03343 ,  H04L27/2601 ,  H04L27/2602 ,  H04L27/261 ,  H04L27/2647 ,  H04L2001/0093 ,  H04W16/28 ,  H04W52/50 ,  H04W74/04

Abstract: PROBLEM TO BE SOLVED: To provide techniques to calibrate downlink and uplink channels to account for differences in frequency responses of transmission and reception chains at an access point and a user terminal. SOLUTION: Pilots are transmitted on downlink and uplink channels and used to derive estimates of downlink and uplink channel responses, respectively. Two sets of correction factors are then determined based on the estimates of the downlink and uplink channel responses. A calibrated downlink channel is formed by using a first set of correction factors for the downlink channel, and a calibrated uplink channel is formed by using a second set of correction factors for the uplink channel. The first and second sets of correction factors may be determined using a matrix-ratio computation or a minimum mean square error (MMSE) computation. The calibration may be performed in real time based on over-the-air transmission. COPYRIGHT: (C)2011,JPO&INPIT

Abstract translation: 要解决的问题：提供校准下行链路和上行链路信道以解决接入点和用户终端处的发射和接收链的频率响应差异的技术。 解决方案：飞行员在下行链路和上行链路信道上传输，分别用于导出下行链路和上行链路信道响应的估计。 然后基于下行链路和上行链路信道响应的估计来确定两组校正因子。 通过使用用于下行链路信道的第一组校正因子形成校准的下行链路信道，并且通过使用用于上行链路信道的第二组校正因子形成校准的上行链路信道。 可以使用矩阵比计算或最小均方误差（MMSE）计算来确定第一和第二组校正因子。 可以基于空中传输实时地进行校准。 版权所有（C）2011，JPO＆INPIT

公开(公告)号：JP2011024233A

公开(公告)日：2011-02-03

申请号：JP2010185302

申请日：2010-08-20

Applicant: Qualcomm Inc ,  クゥアルコム・インコーポレイテッドQualcomm Incorporated

Inventor： MENON MURALI PARAVATH ,  KETCHUM JOHN W ,  WALLACE MARK S ,  WALTON JAY ROD ,  HOWARD STEVEN J

IPC: H04J99/00 ,  H01Q3/26 ,  H04B7/005 ,  H04B7/04 ,  H04B7/06 ,  H04J11/00 ,  H04L27/26

CPC classification number: H04B7/0417 ,  H01Q3/26 ,  H04B7/043 ,  H04B7/0617 ,  H04B7/0634 ,  H04L5/0025 ,  H04L5/0044 ,  H04L5/0053 ,  H04L5/006 ,  H04L5/0085 ,  H04L5/0096 ,  H04L25/0204 ,  H04L25/0246 ,  H04L25/0248 ,  H04L25/03343 ,  H04L2025/03414 ,  H04L2025/03426 ,  H04L2025/03802 ,  H04W52/42

Abstract: PROBLEM TO BE SOLVED: To provide techniques with which beam-steering and beam-forming are performed so as to transmit data on a single eigenmode in a wideband multiple-input channel.
SOLUTION: Depending on how steering vectors are defined, beam-steering or beam-forming is achieved for each subband. Total transmit power is allocated to the subbands on the basis of a particular power allocation scheme (e.g., full channel inversion, selective channel inversion, water-filling or uniform). A scaling value is then obtained for each subband on the basis of its allocated transmit power. Data to be transmitted are coded and modulated to provide modulation symbols. The modulation symbols to be transmitted on each subband are scaled with the subband's scaling value and further preconditioned with the subband's steering vector.
COPYRIGHT: (C)2011,JPO&INPIT

Abstract translation: 要解决的问题：提供执行波束转向和波束形成以便在宽带多输入通道中的单个本征模式上发送数据的技术。 解决方案：根据如何定义导向矢量，实现每个子带的波束转向或波束形成。 基于特定的功率分配方案（例如，全信道反转，选择性信道反转，注水或均匀）将总发射功率分配给子带。 然后根据其分配的发射功率，为每个子带获得缩放值。 要发送的数据被编码和调制以提供调制符号。 要在每个子带上发送的调制符号用子带的缩放值进行缩放，并进一步用子带的导向矢量进行预处理。 版权所有（C）2011，JPO＆INPIT

公开(公告)号：JP2011010332A

公开(公告)日：2011-01-13

申请号：JP2010172439

申请日：2010-07-30

Applicant: Qualcomm Inc ,  クゥアルコム・インコーポレイテッドQualcomm Incorporated

Inventor： KETCHUM JOHN W ,  WALLACE MARK S ,  WALTON J RODNEY ,  HOWARD STEVEN J

IPC: H04J99/00 ,  H04B7/04 ,  H04B7/08 ,  H04L1/06 ,  H04L25/02 ,  H04L27/26

CPC classification number: H04B7/0417 ,  H04B7/0854 ,  H04L1/0002 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/06 ,  H04L25/0206 ,  H04L27/2601

Abstract: PROBLEM TO BE SOLVED: To provide a spatial processing method for a receiver in a MIMO system.SOLUTION: In the spatial processing method, multiple received symbol streams are obtained for multiple data symbol streams transmitted through the multiple spatial channels of a MIMO channel. Spatial processing is performed in a transmitter with steering vectors, that is, estimates of transmitter steering vectors required to orthogonalize the multiple spatial channels, and spatial processing is performed on the multiple received symbol streams with a spatial filter to obtain symbol streams for multiple filters, that is, estimates of the multiple data symbol streams. Further, in the spatial processing method, response is obtained for the spatial filter based on an MMSE criterion for minimizing a mean square error between the symbol streams for the filters and the data symbol streams.

Abstract translation: 要解决的问题：提供MIMO系统中的接收机的空间处理方法。解决方案：在空间处理方法中，通过MIMO信道的多个空间信道发送的多个数据符号流获得多个接收符号流。 在具有导向向量的发射机中执行空间处理，即，使多个空间信道正交化所需的发射机导向矢量的估计，并且对具有空间滤波器的多个接收符号流执行空间处理，以获得用于多个滤波器的符号流， 即多个数据符号流的估计。 此外，在空间处理方法中，基于用于最小化用于滤波器的符号流和数据符号流之间的均方误差的MMSE准则，获得针对空间滤波器的响应。

公开(公告)号：JP2010226736A

公开(公告)日：2010-10-07

申请号：JP2010098917

申请日：2010-04-22

Applicant: Qualcomm Inc ,  クゥアルコム・インコーポレイテッドQualcomm Incorporated

Inventor： WALTON J RODNEY ,  KETCHUM JOHN W ,  WALLACE MARK ,  HOWARD STEVEN J

IPC: H04J99/00 ,  H04B7/005 ,  H04B7/04 ,  H04B7/06 ,  H04B7/08 ,  H04J11/00 ,  H04L1/00 ,  H04L1/06 ,  H04L1/08 ,  H04L1/16 ,  H04L12/28 ,  H04L12/56 ,  H04L25/02 ,  H04L25/03 ,  H04L27/26 ,  H04W16/28 ,  H04W28/06 ,  H04W88/02

CPC classification number: H04B7/0417 ,  H04B7/0421 ,  H04B7/043 ,  H04B7/0434 ,  H04B7/0452 ,  H04B7/0628 ,  H04B7/0669 ,  H04B7/0689 ,  H04B7/0697 ,  H04B7/0854 ,  H04B7/0871 ,  H04J11/003 ,  H04J11/0053 ,  H04L1/0001 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0017 ,  H04L1/06 ,  H04L5/0073 ,  H04L25/0224 ,  H04L25/0226 ,  H04L25/0242 ,  H04L25/0248 ,  H04L25/03343 ,  H04L25/03891 ,  H04L27/2601 ,  H04L27/2602 ,  H04L27/261 ,  H04L27/2647 ,  H04L27/2675 ,  H04W16/28 ,  H04W52/50 ,  H04W72/046 ,  H04W74/04

Abstract: PROBLEM TO BE SOLVED: To give the improved property and higher flexibility of a communicating system, by a MIMO system having multiple spatial multiplexing modes. SOLUTION: The communicating system includes (1) a steered mode of a single user which transmits multiple data streams by an orthogonal spatial channel to a single receiver, (2) a non-steered mode of a single user which transmits multiple data streams from multiple antennas to a single receiver without any spatial processing in a transmitter, (3) steered modes of multi-users which transmit multiple data streams to multiple receivers at the same time while being accompanied by a spatial processing in a transmitter, and (4) non-steered modes of multi-users which transmit multiple data streams from multiple antennas to multiple receivers having multiple antennas without any spatial processing in a transmitter. Each spatial multiplexing mode is selected from multiple spatial multiplexing modes supported by the system to the set of the terminal of each user. COPYRIGHT: (C)2011,JPO&INPIT

Abstract translation: 要解决的问题：通过具有多个空间复用模式的MIMO系统来提供通信系统的改进的性能和更高的灵活性。 解决方案：通信系统包括（1）单个用户的转向模式，其通过正交空间信道向单个接收机发送多个数据流，（2）发送多个数据的单个用户的非转向模式 从多个天线到单个接收机的流，在发射机中没有任何空间处理，（3）多个用户的转向模式，其在同时发送多个数据流到多个接收机，同时伴随着发射机中的空间处理，以及（ 4）多个用户的非转向模式，其将多个数据流从多个天线发射到具有多个天线的多个接收机，而无需在发射机中进行任何空间处理。 每个空间复用模式从系统支持的多个空间复用模式中选择到每个用户的终端的集合。 版权所有（C）2011，JPO＆INPIT

公开(公告)号：JP2010183580A

公开(公告)日：2010-08-19

申请号：JP2010030077

申请日：2010-02-15

Applicant: Qualcomm Inc ,  クゥアルコム・インコーポレイテッドQualcomm Incorporated

Inventor： WALTON RODNEY J ,  KETCHUM JOHN W ,  WALLACE MARK ,  HOWARD STEVEN J

IPC: H04J99/00 ,  H04B7/005 ,  H04B7/02 ,  H04B7/04 ,  H04B7/06 ,  H04B7/08 ,  H04J11/00 ,  H04L1/00 ,  H04L1/06 ,  H04L1/16 ,  H04L12/28 ,  H04L12/56 ,  H04L25/02 ,  H04L25/03 ,  H04L27/26 ,  H04W28/20 ,  H04W52/50

CPC classification number: H04L5/0007 ,  H04B7/0421 ,  H04B7/043 ,  H04B7/0669 ,  H04B7/0697 ,  H04B7/0854 ,  H04L1/0017 ,  H04L5/0023 ,  H04L5/0028 ,  H04L5/0037 ,  H04L25/0232 ,  H04L25/0248 ,  H04L27/2602 ,  H04W28/20 ,  H04W52/50 ,  H04W72/04

Abstract: PROBLEM TO BE SOLVED: To provide multicarrier transmission using a plurality of symbol lengths. SOLUTION: System traffic may be arranged into different categories. For each category, OFDM symbols of proper sizes may be selected based on the expected payload size for the traffic in that category. For example, control data may be transmitted using OFDM symbols of a first size, user data may be transmitted using OFDM symbols of the first size and a second size, and pilot data may be transmitted using OFDM symbols of a third size or the first size. In one exemplary design, a small OFDM symbol is utilized for pilot and for transport channels used to send control data, and a large OFDM symbol and the small OFDM symbol are utilized for transport channels used to send user data. COPYRIGHT: (C)2010,JPO&INPIT

Abstract translation: 要解决的问题：使用多个符号长度来提供多载波传输。 解决方案：系统流量可能被排列成不同的类别。 对于每个类别，可以基于该类别中的业务的预期有效载荷大小来选择适当大小的OFDM符号。 例如，可以使用第一大小的OFDM符号发送控制数据，可以使用第一大小和第二大小的OFDM符号发送用户数据，并且可以使用第三大小或第一大小的OFDM符号来发送导频数据 。 在一个示例性设计中，小OFDM符号用于导频和用于发送控制数据的传输信道，并且将大OFDM符号和小OFDM符号用于用于发送用户数据的传输信道。 版权所有（C）2010，JPO＆INPIT

公开(公告)号：JP2010178352A

公开(公告)日：2010-08-12

申请号：JP2010040561

申请日：2010-02-25

Applicant: Qualcomm Inc ,  クゥアルコム・インコーポレイテッドQualcomm Incorporated

Inventor： HOWARD STEVEN J ,  WALTON JAY RODNEY ,  WALLACE MARK S

IPC: H04J99/00 ,  H04B7/04 ,  H04B7/06 ,  H04B7/10 ,  H04L5/02 ,  H04L27/26

CPC classification number: H04B7/0617 ,  H04B7/0408 ,  H04B7/0417 ,  H04B7/0626 ,  H04B7/0671

Abstract: PROBLEM TO BE SOLVED: To perform continuous beamforming for a MIMO-OFDM system. SOLUTION: A transmitting entity performs spatial processing on data symbols for each subband with an eigenmode matrix, a steering matrix, or an identity matrix. The data symbols may be sent on orthogonal spatial channels by using the eigenmode matrix, on different spatial channels by using the steering matrix, or from different transmit antennas by using the identity matrix. The transmitting entity further performs beamforming on the spatially processed symbols, in the frequency domain or time domain, prior to transmission from the multiple transmit antennas. A receiving entity performs the complementary processing to recover the data symbols sent by the transmitting entity. Moreover, the receiving entity may derive a spatial filter matrix for each subband based on a MIMO channel response for that subband and perform receiver spatial processing for the subband by using the spatial filter matrix. COPYRIGHT: (C)2010,JPO&INPIT

Abstract translation: 要解决的问题：为MIMO-OFDM系统执行连续波束成形。 解决方案：发送实体对具有本征模式矩阵，导向矩阵或单位矩阵的每个子带的数据符号执行空间处理。 数据符号可以在正交空间信道上通过使用本征模式矩阵，在不同的空间信道上使用导引矩阵，或者通过使用单位矩阵从不同的发射天线发送。 在从多个发射天线的发射之前，发射实体在频域或时域中进一步对空间处理的符号执行波束成形。 接收实体执行补充处理以恢复由发送实体发送的数据符号。 此外，接收实体可以基于该子带的MIMO信道响应导出每个子带的空间滤波器矩阵，并且通过使用空间滤波器矩阵对子带执行接收机空间处理。 版权所有（C）2010，JPO＆INPIT

公开(公告)号：JP2010119110A

公开(公告)日：2010-05-27

申请号：JP2009287916

申请日：2009-12-18

Applicant: Qualcomm Inc ,  クゥアルコム・インコーポレイテッドQualcomm Incorporated

Inventor： WALTON J RODNEY ,  WALLACE MARK S ,  KETCHUM JOHN W ,  HOWARD STEVEN J

IPC: H04W28/22 ,  H04B7/005 ,  H04B7/04 ,  H04B7/06 ,  H04B7/08 ,  H04J3/00 ,  H04J11/00 ,  H04J99/00 ,  H04L1/00 ,  H04L1/06 ,  H04L1/08 ,  H04L1/16 ,  H04L12/28 ,  H04L12/56 ,  H04L25/02 ,  H04L25/03 ,  H04L27/26 ,  H04W16/28 ,  H04W28/18 ,  H04W52/50

CPC classification number: H04L27/261 ,  H04B7/0417 ,  H04B7/043 ,  H04B7/0443 ,  H04B7/0669 ,  H04B7/0697 ,  H04B7/0854 ,  H04L1/0002 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0016 ,  H04L1/0017 ,  H04L1/0025 ,  H04L1/0059 ,  H04L1/0061 ,  H04L1/0071 ,  H04L1/0675 ,  H04L1/20 ,  H04L25/0224 ,  H04L25/0226 ,  H04L25/0242 ,  H04L25/03343 ,  H04L27/2601 ,  H04L27/2602 ,  H04L27/2647 ,  H04L2001/0093 ,  H04W16/28 ,  H04W52/50 ,  Y02D50/10

Abstract: PROBLEM TO BE SOLVED: To provide closed-loop rate control for data transmission in a plurality of parallel channels. SOLUTION: An internal loop estimates channel conditions of communication links, and selects data rates suitable for each of the plurality of parallel channels based on channel estimation. Reception SNRs are calculated based on the channel estimation by parallel channels; operation SNRs are calculated, based on the reception SNRs and SNR offsets of the parallel channels; and the data rates are selected, based on the operation SNRs of the parallel channels and one set of necessary SNRs of one set of data rates supported by systems. An external loop estimates the quality of the data transmission received by the plurality of parallel channels to adjust the operation of the internal loop. For example, the SNR offset for each parallel channel is adjusted, based on the statuses of packets received by the parallel channels. COPYRIGHT: (C)2010,JPO&INPIT

Abstract translation: 要解决的问题：为多个并行通道中的数据传输提供闭环速率控制。 解决方案：内部循环估计通信链路的信道条件，并且基于信道估计来选择适合于多个并行信道中的每一个的数据速率。 基于并行信道的信道估计来计算接收SNR; 基于并行信道的接收SNR和SNR偏移来计算操作SNR; 并且基于并行信道的操作SNR和系统支持的一组数据速率的一组必需SNR来选择数据速率。 外部环路估计由多个并行通道接收的数据传输的质量，以调整内部循环的操作。 例如，基于由并行信道接收的分组的状态来调整每个并行信道的SNR偏移。 版权所有（C）2010，JPO＆INPIT

公开(公告)号：JP2010016837A

公开(公告)日：2010-01-21

申请号：JP2009176266

申请日：2009-07-29

Applicant: Qualcomm Inc ,  クゥアルコム・インコーポレイテッドQualcomm Incorporated

Inventor： WALTON JAY R ,  KETCHUM JOHN W ,  HOWARD STEVEN J ,  WALLACE MARK

IPC: H04J11/00 ,  H04B1/692 ,  H04B7/005 ,  H04L5/02 ,  H04W72/04

CPC classification number: H04W52/12 ,  H04B1/692 ,  H04L5/0021 ,  H04L5/0048 ,  H04L5/026 ,  H04L25/0228 ,  H04L27/0008 ,  H04L27/2607 ,  H04L27/2613 ,  H04L27/2647 ,  H04L27/2655 ,  H04W52/286

Abstract: PROBLEM TO BE SOLVED: To provide techniques for implementing a multiple-access hybrid OFDM-CDMA system that may be used to provide wireless voice and/or data communications. SOLUTION: In one aspect of a multiple-access OFDM-CDMA system, data spreading is performed in a frequency domain by spreading each data stream with a respective spreading code selected from a set of available spreading codes. To support multiple access, system resources may be allocated and de-allocated to users (e.g., spreading codes may be assigned to users as needed, and transmit power may be allocated to users). Variable rate data for each user may be supported via a combination of spreading adjustment and transmit power scaling. Interference control techniques are also provided to improve system performance via power control of downlink and/or uplink transmissions to achieve the desired level of performance while minimizing interference. A pilot may be transmitted by each transmitter unit to assist the receiver units perform acquisition, timing synchronization, carrier recovery, handoff, channel estimation, coherent data demodulation, and so on. COPYRIGHT: (C)2010,JPO&INPIT

Abstract translation: 要解决的问题：提供用于实现可用于提供无线语音和/或数据通信的多址混合OFDM-CDMA系统的技术。 解决方案：在多址OFDM-CDMA系统的一个方面，通过用从一组可用的扩展码中选出的相应的扩展码扩展每个数据流，在频域中执行数据扩展。 为了支持多重访问，可以向用户分配和分配系统资源（例如，可以根据需要将扩展​​码分配给用户，并且发送功率可以被分配给用户）。 可以通过扩展调整和发射功率缩放的组合来支持每个用户的可变速率数据。 还提供干扰控制技术以通过下行链路和/或上行链路传输的功率控制来提高系统性能，以实现期望的性能水平同时最小化干扰。 每个发射机单元可以发送导频，以帮助接收机单元执行采集，定时同步，载波恢复，切换，信道估计，相干数据解调等。 版权所有（C）2010，JPO＆INPIT

公开(公告)号：JP2009189045A

公开(公告)日：2009-08-20

申请号：JP2009102926

申请日：2009-04-21

Applicant: Qualcomm Inc ,  クゥアルコム・インコーポレイテッドQualcomm Incorporated

Inventor： KETCHUM JOHN W ,  WALLACE MARK ,  HOWARD STEVEN J ,  WALTON JAY ROD

IPC: H04J99/00 ,  H04B7/04 ,  H04L1/00 ,  H04L25/03 ,  H04L27/26

CPC classification number: H04B7/0417 ,  H04B7/0443 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0026 ,  H04L1/0029 ,  H04L25/03343 ,  H04L25/03834 ,  H04L27/2601 ,  H04L27/2647 ,  H04L2025/0349 ,  H04L2025/03605

Abstract: PROBLEM TO BE SOLVED: To provide time-domain transmit and receive processing using channel eigen-mode decomposition for MIMO systems. SOLUTION: In an aspect, a time-domain implementation is provided which uses frequency-domain singular value decomposition and "water-pouring" results to derive time-domain pulse-shaping and beam-steering solutions at the transmitter and receiver. The singular value decomposition is performed at the transmitter to determine eigen-modes (i.e., spatial subchannels) of the MIMO channel and to derive a first set of steering vectors used to "precondition" modulation symbols. The singular value decomposition is also performed at the receiver to derive a second set of steering vectors used to precondition the received signals, such that orthogonal symbol streams are recovered at the receiver, which can simplify the receiver processing. COPYRIGHT: (C)2009,JPO&INPIT

Abstract translation: 要解决的问题：使用MIMO系统的信道本征模式分解来提供时域发射和接收处理。 解决方案：在一方面，提供了时域实现，其使用频域奇异值分解和“浇注”结果以在发射机和接收机处导出时域脉冲整形和波束导引解决方案。 在发射机处执行奇异值分解以确定MIMO信道的本征模式（即，空间子信道），并导出用于“调制前缀”调制符号的第一组导引向量。 奇异值分解也在接收机处执行以导出用于预处理接收信号的第二组导引向量，使得在接收机处恢复正交符号流，这可以简化接收机处理。 版权所有（C）2009，JPO＆INPIT