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    Adaptive equalizer tap coefficient correction method and optical receiver
    4.
    发明公开
    Adaptive equalizer tap coefficient correction method and optical receiver 审中-公开
    自适应均衡器和光接收器的抽头系数的校正方法

    公开(公告)号：EP2763366A3

    公开(公告)日：2014-08-20

    申请号：EP13193437.4

    申请日：2013-11-19

    申请人： FUJITSU LIMITED

    发明人： Saito, Taku ,  Koizumi, Nobukazu ,  Nakashima, Hisao ,  Takeuchi, Osamu ,  Araki, Hirofumi

    IPC分类号： H04L25/03 ,  H04B10/61

    CPC分类号： H04L25/03 ,  H04B10/60 ,  H04L25/03044

    摘要： A method of tap coefficient correction includes: obtaining a synchronization symbol difference between a first polarization and a second polarization orthogonal to the first polarization; obtaining a delay amount of each of the first polarization and the second polarization in an adaptive equalizer; calculating, in a case where a horizontal axis represents a tap number and a vertical axis represents a tap coefficient and a tap number or a nearest tap number with which an area of a drawn figure is halved is set as a gravity center of tap coefficients, a correction reference gravity center of the tap coefficients set in the adaptive equalizer, based on the synchronization symbol difference and the delay amount; and performing a correction of shifting an entire tap coefficients in units of symbol to cause the correction reference gravity center to be closest to a tap center.

    EQUALIZATION WITH SELECTION OF SAMPLES
    7.
    发明公开
    EQUALIZATION WITH SELECTION OF SAMPLES 审中-公开
    与样本选择均衡器

    公开(公告)号：EP1832070A1

    公开(公告)日：2007-09-12

    申请号：EP04806471.1

    申请日：2004-12-30

    申请人： Nokia Corporation

    发明人： HEIKKILÄ, Markku

    IPC分类号： H04L25/03 ,  H04B7/08

    CPC分类号： H04L25/03044 ,  H04L7/0054

    摘要： The invention relates to a method for equalizing signals transmitted via at least one transmission antenna and received by at least one reception antenna (2, 4). To reduce filter complexity, the invention provides for selecting the chip-samples of the received signals such that only one sample per chip is selected for each filter (30, 32; 34, 36).

    ADAPTIVE DIGITAL BEAMFORMER COEFFICIENT PROCESSOR FOR SATELLITE SIGNAL INTERFERENCE REDUCTION
    9.
    发明公开
    ADAPTIVE DIGITAL BEAMFORMER COEFFICIENT PROCESSOR FOR SATELLITE SIGNAL INTERFERENCE REDUCTION 审中-公开
    自适应数字STRAHLFORMERKOEFFIZIENTENPROZESSOR还原卫星信号干扰

    公开(公告)号：EP1514449A2

    公开(公告)日：2005-03-16

    申请号：EP02719517.1

    申请日：2002-04-17

    申请人： Lockheed Martin Corporation

    发明人： GAUS, Richard, C., Jr. ,  AL-DHAHIR, Naofal

    IPC分类号： H04R3/00

    CPC分类号： H04L25/03044 ,  H04B7/086 ,  H04L2025/03509

    摘要： Filter coefficients of a beamformer (100) are computed based on a segment of input samples. The segment of input samples is divided into a plurality of blocks of input samples wherein the plurality of blocks of input samples are received by a shared memory at a first rate. The first block of the plurality of blocks is received in the shared memory at a first time. The plurality of blocks of input samples from the shared memory are read out at a second rate wherein the first block of the plurality of blocks is read from the shared memory at a second time. A plurality of partial covariance matrices for the plurality of blocks read from the shared memory are computed and added together to determine a covariance matrices used to compute the filter coefficients.