公开(公告)号：JP2010119134A

公开(公告)日：2010-05-27

申请号：JP2010019320

申请日：2010-01-29

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 THE 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)2010,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”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）2010，JPO＆INPIT

公开(公告)号：JP2010063111A

公开(公告)日：2010-03-18

申请号：JP2009219253

申请日：2009-09-24

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

Inventor： BJERKE BJORN ,  KETCHUM JOHN W ,  SINDHUSHAYANA NAGABHUSHANA ,  WALTON JAY ROD

IPC: H03M13/19 ,  H03M13/00 ,  H03M13/11 ,  H04L1/00

CPC classification number: H04L1/0057 ,  H03M13/11 ,  H03M13/6393

Abstract: PROBLEM TO BE SOLVED: To provide a method and an apparatus for generating code words with variable length and redundancy from a single low-density parity check (LDPC) code with variable-length input words. SOLUTION: A mother code for encoding data words is generated based on a parity check matrix, and the mother code is adjusted to reflect the size of the data word to be encoded. A generator matrix applies the mother code to the data words to produce a code words for transmission. A reduction criteria is determined and the size of the generator matrix is reduced accordingly. At a receiver, a corresponding parity check matrix is applied to decode the received code word. COPYRIGHT: (C)2010,JPO&INPIT

Abstract translation: 解决的问题：提供一种用于从具有可变长度输入字的单个低密度奇偶校验（LDPC）码生成具有可变长度和冗余的码字的方法和装置。 解决方案：基于奇偶校验矩阵生成用于编码数据字的母码，并且调整母码以反映要编码的数据字的大小。 生成矩阵将母码应用于数据字以产生用于传输的码字。 确定减少标准，并相应地减小发电机矩阵的尺寸。 在接收机处，应用相应的奇偶校验矩阵来解码所接收的码字。 版权所有（C）2010，JPO＆INPIT

公开(公告)号：JP2011097619A

公开(公告)日：2011-05-12

申请号：JP2010280775

申请日：2010-12-16

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 ,  HOWARD STEVEN J ,  WALTON JAY ROD ,  WALLACE MARK S ,  LING FUYUN

IPC: H04J11/00 ,  H04J99/00 ,  H04B7/005 ,  H04B7/04 ,  H04B7/06 ,  H04B7/26 ,  H04L1/00 ,  H04L1/06 ,  H04L5/06 ,  H04L25/03 ,  H04L27/26

CPC classification number: H04W52/346 ,  H04L1/0009 ,  H04L1/0068 ,  H04L1/06 ,  H04L5/0023 ,  H04L5/0037 ,  H04L5/0046 ,  H04L5/006 ,  H04L5/06 ,  H04L25/03343 ,  H04L2001/0096 ,  H04W52/24 ,  H04W52/42

Abstract: PROBLEM TO BE SOLVED: To provide a novel and improved method and apparatus for processing data for transmission in a wireless communication system using selective channel inversion. SOLUTION: The method includes: coding data based on a common coding and modulation scheme to provide modulation symbols; and pre-weighting the modulation symbols for each selected channel based on the channel's characteristics. The pre-weighting may be achieved by "inverting" the selected channels so that the received SNRs are approximately similar for all selected channels. With selective channel inversion, only channels having SNRs above a particular threshold are selected, "bad" channels are not used, and the total available transmit power is distributed across only "good" channels. COPYRIGHT: (C)2011,JPO&INPIT

Abstract translation: 要解决的问题：提供一种用于在使用选择性信道反转的无线通信系统中处理用于传输的数据的新颖和改进的方法和装置。 解决方案：该方法包括：基于公共编码和调制方案对数据进行编码以提供调制符号; 并且基于信道的特性对每个所选信道的调制符号进行预加权。 预加权可以通过“反转”所选择的信道来实现，使得接收的SNR对于所有选择的信道大致相似。 通过选择性信道反转，仅选择具有高于特定阈值的SNR的信道，不使用“坏”信道，并且总可用发射功率仅在“良好”信道上分布。 版权所有（C）2011，JPO＆INPIT

公开(公告)号：JP2009081873A

公开(公告)日：2009-04-16

申请号：JP2008291137

申请日：2008-11-13

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 ,  HOWARD STEVEN J ,  WALTON JAY ROD ,  WALLACE MARK S ,  LING FUYUN

IPC: H04J11/00 ,  H04J99/00 ,  H04B7/005 ,  H04B7/04 ,  H04B7/06 ,  H04B7/26 ,  H04L1/00 ,  H04L1/06 ,  H04L5/06 ,  H04L25/03 ,  H04L27/26

CPC classification number: H04W52/346 ,  H04L1/0009 ,  H04L1/0068 ,  H04L1/06 ,  H04L5/0023 ,  H04L5/0037 ,  H04L5/0046 ,  H04L5/006 ,  H04L5/06 ,  H04L25/03343 ,  H04L2001/0096 ,  H04W52/24 ,  H04W52/42

Abstract: PROBLEM TO BE SOLVED: To provide an effective coding and modulation scheme capable of processing data before transmission on a channel. SOLUTION: Data are coded on the basis of a common coding and modulation scheme to provide modulation symbols and the modulation symbols for each selected channel are pre-weighted on the basis of channel's characteristics. The pre-weighting may be achieved by "inverting" the selected channels so that the received SNRs are approximately similar for all selected channels. With selective channel inversion, only channels having SNRs at or above a particular threshold are selected, "bad" channels are not used, and the total available transmit power is distributed across only "good" channels. Improved performance is achieved due to the combined benefits of using only the Ns best channels and matching the received SNR of each selected channel to the SNR required by the selected coding and modulation scheme. COPYRIGHT: (C)2009,JPO&INPIT

Abstract translation: 要解决的问题：提供能够在通道上传输之前处理数据的有效的编码和调制方案。 解决方案：基于通用编码和调制方案对数据进行编码以提供调制符号，并且基于信道的特性对每个选定信道的调制符号进行预加权。 预加权可以通过“反转”所选择的信道来实现，使得接收的SNR对于所有选择的信道大致相似。 通过选择性信道反转，仅选择具有等于或高于特定阈值的SNR的信道，不使用“坏”信道，并且总可用发射功率仅在“良好”信道上分布。 由于仅使用Ns最佳信道并且将每个所选信道的接收SNR与所选择的编码和调制方案所需的SNR相匹配的综合益处，实现了改进的性能。 版权所有（C）2009，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：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

公开(公告)号：JP2011125040A

公开(公告)日：2011-06-23

申请号：JP2011002259

申请日：2011-01-07

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

Inventor： MEDVEDEV IRINA ,  WALTON JAY ROD ,  KETCHUM JOHN W

IPC: H04J99/00 ,  H04B7/005 ,  H04B7/04 ,  H04J11/00 ,  H04W24/00 ,  H04W52/24 ,  H04W52/26 ,  H04W52/34 ,  H04W52/50 ,  H04W72/00

CPC classification number: H04W52/346 ,  H04B7/0443 ,  H04W24/00 ,  H04W52/241 ,  H04W52/267 ,  H04W52/50 ,  H04W72/00

Abstract: PROBLEM TO BE SOLVED: To provide a method of reallocating excess power for full channel-state information (CSI) multiple-input, multiple-output (MIMO) systems. SOLUTION: The total transmit power may be initially allocated to the transmission channels based on a particular power allocation scheme. The initial allocation may result in more power being allocated to some transmission channels than needed to achieve the required SNR. In such situations, the techniques reallocate the excess transmit power of transmission channels operated in the saturation region to other transmission channels operated below the saturation region. In this way, higher data rate may be achieved for the "poorer" transmission channels without sacrificing the performance of the "better" transmission channels. COPYRIGHT: (C)2011,JPO&INPIT

Abstract translation: 要解决的问题：提供一种重新分配用于全信道状态信息（CSI）多输入多输出（MIMO）系统的多余功率的方法。 解决方案：总发射功率可以基于特定的功率分配方案最初分配给传输信道。 初始分配可以导致比实现所需的SNR所需的更多的功率被分配给一些传输信道。 在这种情况下，这些技术将在饱和区域中运行的传输信道的多余发射功率重新分配到在饱和区域以下运行的其它传输信道。 以这种方式，对于“较差”的传输信道可以实现更高的数据速率，而不牺牲“更好”的传输信道的性能。 版权所有（C）2011，JPO＆INPIT

公开(公告)号：BRPI0210417B1

公开(公告)日：2016-06-28

申请号：BR0210417

申请日：2002-06-13

Applicant: QUALCOMM INC

Inventor： WALTON JAY ROD ,  KETCHUM JOHN W

IPC: H04B7/005 ,  H04J99/00 ,  H04B7/04 ,  H04B7/06 ,  H04B7/26 ,  H04J11/00 ,  H04L1/00 ,  H04L1/06 ,  H04L5/06 ,  H04L25/03 ,  H04L27/26 ,  H04W52/24 ,  H04W52/34 ,  H04W52/50

Abstract: "método e equipamento para processamento de dados para transmissão em um sistema de comunicação de múltiplos canais usando inversão seletiva de canal". na presente invenção são descritas técnicas para processar dados para transmissão através de múltiplos canais de transmissão. os canais de transmissão disponíveis são separados em um ou mais grupos, e os canais em cada grupo são selecionados para uso em transmissão de dados. os dados para cada grupo são codificados e modulados com base em um esquema de codificação e modulação específico para prover símbolos de modulação, e os símbolos de modulação para cada canal selecionado são ponderados com base em pesos designados. a ponderação "inverte" os canais selecionados de modo que eles alcancem snrs recebidas semelhantes. com a inversão seletiva de canal, apenas canais "bons" em cada grupo que possui snrs no ou acima de um limite específico são selecionados, os canais "ruins" não são usados e a potência de transmissão total disponível para o grupo é distribuída pelos canais bons no grupo. desempenho aperfeiçoado é atingido mediante uso apenas de canais bons em cada grupo e coincidência de cada snr recebida do canal selecionado com a snr requerida.

公开(公告)号：CA2495438C

公开(公告)日：2012-05-29

申请号：CA2495438

申请日：2003-08-19

Applicant: QUALCOMM INC

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

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

Abstract: Techniques to perform beam-steering and beam-forming to transmit data on a single eigenmode in a wideband multiple-input channel. In one method, a steering vector is obtained for each of a number of subbands. Depending on how the steering vectors are defined, beam-steering or beam-forming can be achieved for each subband. The total transmit power is allocated to the subbands based on 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 based on its allocated transmit power. Data to be transmitted is 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. A stream of preconditioned symbols is then formed for each transmit antenna.

公开(公告)号：NO329815B1

公开(公告)日：2010-12-27

申请号：NO20034981

申请日：2003-11-10

Applicant: QUALCOMM INC

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

IPC: H04B7/08 ,  H04J99/00 ,  H04B7/06 ,  H04B7/12 ,  H04L1/00

Abstract: Techniques to 'successively' process received signals at a receiver unit in a MIMO system to recover transmitted data, and to 'adaptively' process data at a transmitter unit based on channel state information available for the MIMO channel. A successive cancellation receiver processing technique is used to process the received signals and performs a number of iterations to provide decoded data streams. For each iteration, input (e.g., received) signals for the iteration are processed to provide one or more symbol streams. One of the symbol streams is selected and processed to provide a decoded data stream. The interference due to the decoded data stream is approximately removed (i.e., canceled) from the input signals provided to the next iteration. The channel characteristics are estimated and reported back to the transmitter system and used to adjust (i.e., adapt) the processing (e.g., coding, modulation, and so on) of data prior to transmission.