利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

11 条记录 (耗时 0.015 秒)

    REALLOCATION OF EXCESS POWER FOR FULL CHANNEL-STATE INFORMATION (CSI) MULTIPLE-INPUT, MULTIPLE-OUTPUT (MIMO) SYSTEMS
    2.
    发明公开
    REALLOCATION OF EXCESS POWER FOR FULL CHANNEL-STATE INFORMATION (CSI) MULTIPLE-INPUT, MULTIPLE-OUTPUT (MIMO) SYSTEMS 有权
    生产能力过剩FOR多个输入 - 输出多个系统（MIMO）系统，具有全信道状态信息REMAP（CSI）

    公开(公告)号：EP1468505A1

    公开(公告)日：2004-10-20

    申请号：EP03707488.7

    申请日：2003-01-22

    申请人： QUALCOMM Incorporated

    发明人： MEDVEDEV, Irina ,  WALTON, Jay, Rod ,  KETCHUM, John, W.

    IPC分类号： H04B7/005

    CPC分类号： H04W52/346 ,  H04B7/0443 ,  H04W24/00 ,  H04W52/241 ,  H04W52/267 ,  H04W52/50 ,  H04W72/00

    摘要： Techniques to allocate the total transmit power to the transmission channels in a multi-channel communication system such that higher overall system spectral efficiency and/or other benefits may be achieved. The total transmit power may be initially allocated to the transmission channels based on a particular power allocation scheme (e.g., the water-filling scheme). The initial allocation may result in more power being allocated to some transmission channels than needed to achieve the required SNR (e.g., the SNR needed to achieve the maximum allowed data rate), which would then result in these transmission channels being operated in the saturation region. 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.

    CODED MIMO SYSTEMS WITH SELECTIVE CHANNEL INVERSION APPLIED PER EIGENMODE
    3.
    发明公开
    CODED MIMO SYSTEMS WITH SELECTIVE CHANNEL INVERSION APPLIED PER EIGENMODE 有权
    选择性信道反转编码MIMO系统中应用BY自己的时尚

    公开(公告)号：EP1532762A1

    公开(公告)日：2005-05-25

    申请号：EP03791732.5

    申请日：2003-08-19

    申请人： QUALCOMM Incorporated

    发明人： MEDVEDEV, Irina ,  WALTON, Jay, Rod ,  KETCHUM, John, W.

    IPC分类号： H04L1/06 ,  H04B7/005

    CPC分类号： H04W52/346 ,  H04B7/0413 ,  H04B7/0439 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0041 ,  H04L1/0068 ,  H04L1/0071 ,  H04W52/42

    摘要： Techniques to perform selective channel inversion per eigenmode in a MIMO system to achieve high spectral efficiency while reducing complexity at both the transmitter and receiver are presented. The available transmission channels are arranged into a number of groups, where each group may include all transmission channels (or frequency bins) for a respective eigenmode of a MIMO channel. The total transmit power is allocated to the groups using a particular group power allocation scheme. Selective channel inversion is then performed independently for each group selected for use for data transmission. For each such group, one or more transmission channels in the group are selected for use, and a scaling factor is determined for each selected channel such that all selected channels for the group achieve similar received signal quality (e.g., received SNR).

    ALLOCATION OF UPLINK RESOURCES IN A MULTIPLE-INPUT MULTIPLE-OUTPUT (MIMO) COMMUNICATION SYSTEM
    4.
    发明公开
    ALLOCATION OF UPLINK RESOURCES IN A MULTIPLE-INPUT MULTIPLE-OUTPUT (MIMO) COMMUNICATION SYSTEM 有权
    资源分配在反向信道上在多输入多输出（MIMO）通信系统

    公开(公告)号：EP1393466A1

    公开(公告)日：2004-03-03

    申请号：EP02731791.6

    申请日：2002-05-14

    申请人： QUALCOMM INCORPORATED

    发明人： WALTON, Jay, Rod ,  WALLACE, Mark, S. ,  HOWARD, Steven, J.

    IPC分类号： H04B7/02 ,  H04J15/00 ,  H04L12/56 ,  H04Q7/38

    CPC分类号： H04W72/121 ,  H04B7/0417 ,  H04B7/0626 ,  H04B7/0697 ,  H04B7/0891 ,  H04W72/1205

    摘要： Techniques to schedule uplink data transmission for a number of terminals in a wireless communication system. In one method, a number of sets of terminals are formed for possible data transmission, with each set including a unique combination of terminals and corresponds to a hypothesis to be evaluated. The performance of each hypothesis is evaluated (e.g., based on channel response estimates for each terminal) and one of the evaluated hypotheses is selected based on the performance. The terminals in the selected hypothesis are scheduled for data transmission. A successive cancellation receiver processing scheme may be used to process the signals transmitted by the scheduled terminals. In this case, one or more orderings of the terminals in each set may be formed, with each terminal ordering corresponding to a sub-hypothesis to be evaluated. The performance of each sub-hypothesis is then evaluated and one of the sub-hypothcses is selected.

    ALLOCATION OF UPLINK RESOURCES IN A MULTIPLE-INPUT MULTIPLE-OUTPUT (MIMO) COMMUNICATION SYSTEM
    5.
    发明授权
    ALLOCATION OF UPLINK RESOURCES IN A MULTIPLE-INPUT MULTIPLE-OUTPUT (MIMO) COMMUNICATION SYSTEM 有权
    多输入多输出（MIMO）通信系统中上行资源的分配

    公开(公告)号：EP1393466B1

    公开(公告)日：2016-08-31

    申请号：EP02731791.6

    申请日：2002-05-14

    申请人： QUALCOMM INCORPORATED

    发明人： WALTON, Jay, Rod ,  WALLACE, Mark, S. ,  HOWARD, Steven, J.

    IPC分类号： H04B7/04 ,  H04B7/06 ,  H04B7/08 ,  H04W72/12

    CPC分类号： H04W72/121 ,  H04B7/0417 ,  H04B7/0626 ,  H04B7/0697 ,  H04B7/0891 ,  H04W72/1205

    摘要： Techniques to schedule uplink data transmission for a number of terminals in a wireless communication system. In one method, a number of sets of terminals are formed for possible data transmission, with each set including a unique combination of terminals and corresponds to a hypothesis to be evaluated. The performance of each hypothesis is evaluated (e.g., based on channel response estimates for each terminal) and one of the evaluated hypotheses is selected based on the performance. The terminals in the selected hypothesis are scheduled for data transmission. A successive cancellation receiver processing scheme may be used to process the signals transmitted by the scheduled terminals. In this case, one or more orderings of the terminals in each set may be formed, with each terminal ordering corresponding to a sub-hypothesis to be evaluated. The performance of each sub-hypothesis is then evaluated and one of the sub-hypothcses is selected.

    REALLOCATION OF EXCESS POWER FOR FULL CHANNEL-STATE INFORMATION (CSI) MULTIPLE-INPUT, MULTIPLE-OUTPUT (MIMO) SYSTEMS
    7.
    发明授权
    REALLOCATION OF EXCESS POWER FOR FULL CHANNEL-STATE INFORMATION (CSI) MULTIPLE-INPUT, MULTIPLE-OUTPUT (MIMO) SYSTEMS 有权
    生产能力过剩FOR多个输入 - 输出多个系统（MIMO）系统，具有全信道状态信息REMAP（CSI）

    公开(公告)号：EP1468505B1

    公开(公告)日：2007-10-03

    申请号：EP03707488.7

    申请日：2003-01-22

    申请人： QUALCOMM INCORPORATED

    发明人： MEDVEDEV, Irina ,  WALTON, Jay, Rod ,  KETCHUM, John, W.

    IPC分类号： H04B7/005

    CPC分类号： H04W52/346 ,  H04B7/0443 ,  H04W24/00 ,  H04W52/241 ,  H04W52/267 ,  H04W52/50 ,  H04W72/00

    摘要： Techniques to allocate the total transmit power to the transmission channels in a multi-channel communication system such that higher overall system spectral efficiency and/or other benefits may be achieved. The total transmit power may be initially allocated to the transmission channels based on a particular power allocation scheme (e.g., the water-filling scheme). The initial allocation may result in more power being allocated to some transmission channels than needed to achieve the required SNR (e.g., the SNR needed to achieve the maximum allowed data rate), which would then result in these transmission channels being operated in the saturation region. 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.

    CODED MIMO SYSTEMS WITH SELECTIVE CHANNEL INVERSION APPLIED PER EIGENMODE
    8.
    发明授权
    CODED MIMO SYSTEMS WITH SELECTIVE CHANNEL INVERSION APPLIED PER EIGENMODE 有权
    选择性信道反转编码MIMO系统中应用BY自己的时尚

    公开(公告)号：EP1532762B1

    公开(公告)日：2006-12-06

    申请号：EP03791732.5

    申请日：2003-08-19

    申请人： QUALCOMM INCORPORATED

    发明人： MEDVEDEV, Irina ,  WALTON, Jay, Rod ,  KETCHUM, John, W.

    IPC分类号： H04L1/06 ,  H04B7/005

    CPC分类号： H04W52/346 ,  H04B7/0413 ,  H04B7/0439 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0041 ,  H04L1/0068 ,  H04L1/0071 ,  H04W52/42

    摘要： Techniques to perform selective channel inversion per eigenmode in a MIMO system to achieve high spectral efficiency while reducing complexity at both the transmitter and receiver are presented. The available transmission channels are arranged into a number of groups, where each group may include all transmission channels (or frequency bins) for a respective eigenmode of a MIMO channel. The total transmit power is allocated to the groups using a particular group power allocation scheme. Selective channel inversion is then performed independently for each group selected for use for data transmission. For each such group, one or more transmission channels in the group are selected for use, and a scaling factor is determined for each selected channel such that all selected channels for the group achieve similar received signal quality (e.g., received SNR).

    RATE-COMPATIBLE LOW-DENSITY PARITY-CHECK (LDPC) CODES
    9.
    发明公开
    RATE-COMPATIBLE LOW-DENSITY PARITY-CHECK (LDPC) CODES 有权
    高可靠性低密度奇偶校验（LDPC）编码

    公开(公告)号：EP1576733A1

    公开(公告)日：2005-09-21

    申请号：EP03783405.8

    申请日：2003-11-12

    申请人： QUALCOMM INCORPORATED

    发明人： BJERKE, Bjorn ,  KETCHUM, John, W. ,  SINDHUSHAYANA, Nagabhushana ,  WALTON, Jay, Rod

    IPC分类号： H03M13/00

    CPC分类号： H04L1/0057 ,  H03M13/11 ,  H03M13/6393

    摘要： Method and apparatus for generating codewords with variable length and redundancy from a single Low-Density Parity-Check (LDPC) code with variable length input words. A mother code for encoding data words is generated based on a parity-check matrix, wherein the mother code is adjusted to reflect the size of the data word to be encoded. A generator matrix applies the mother code to data words to produce codewords for transmission. In one embodiment, a reduction criteria is determined and the size of the generator matrix reduced in response. The corresponding parity-check matrix is applied at the receiver for decoding the received codeword.