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    Frequency-domain adaptive feedback equalizer
    61.
    发明公开
    Frequency-domain adaptive feedback equalizer 有权
    ADAPTIVERRÜCKGEKOPPELTERFREQUENZBEREICHSENTZERRER

    公开(公告)号：EP2501089A2

    公开(公告)日：2012-09-19

    申请号：EP11169506.0

    申请日：2011-06-10

    申请人： IMEC ,  Panasonic Corporation

    发明人： Bourdoux, André ,  Yomo, Hidekuni ,  Kobayashi, Kiyotaka

    IPC分类号： H04L25/03

    CPC分类号： H04L25/03159

    摘要： The present invention is related to a circuit (1) for adaptive feedback equalisation comprising
    - a feedforward filtering section (2) and a feedback filtering section (7) arranged for frequency domain filtering,
    - a slicer (4) to slice a block of equalized symbols, whereby a block of sliced symbols is output,
    - summing means (8) for summing the outputs of the feedforward filtering section and the feedback filtering section, thereby yielding said block of equalized symbols,
    - first (9) and second (10) updating means to provide coefficient updates to the feedforward filtering section and to the feedback filtering section, respectively, whereby said first and second updating means are fed with a frequency domain converted block of error signals (11) indicative of the difference between the block of equalized symbols at the slicer input and the block of sliced symbols at the slicer output and for computing updates using said frequency domain converted block of error signals,
    - time-domain compensation means (12) arranged for receiving a time-domain version of the updated filter coefficients of said feedback filtering section and for receiving symbols of the block of sliced symbols and for adding a feedback error compensation signal to the block of equalized symbols.

    摘要翻译： 本发明涉及一种用于自适应反馈均衡的电路（1），包括：前馈滤波部分（2）和布置用于频域滤波的反馈滤波部分（7）;切片器（4） 输出一组分片符号， - 求和装置（8），用于对前馈滤波部分和反馈滤波部分的输出求和，从而产生所述均衡符号块， - 第一（9）和第二（10） 更新装置，分别向前馈滤波部分和反馈滤波部分提供系数更新，由此所述第一和第二更新装置馈送有频域转换的误差信号块（11），其指示均衡块之间的差异 在限幅器输入处的符号和限幅器输出处的分片符号块，并且用于使用所述频域转换的误差信号块计算更新， - 时域 用于接收所述反馈滤波部分的更新的滤波器系数的时域版本并用于接收分片符号块的符号的补偿装置（12），并用于将均衡的符号块加到反馈误差补偿信号。

    METHOD, APPARATUS AND SYSTEM FOR TRANSMITTING CHANNEL STATE INFORMATION
    63.
    发明公开
    METHOD, APPARATUS AND SYSTEM FOR TRANSMITTING CHANNEL STATE INFORMATION 有权
    发送信道状态信息的方法，装置和系统

    公开(公告)号：EP2453587A1

    公开(公告)日：2012-05-16

    申请号：EP10813348.9

    申请日：2010-09-01

    申请人： Huawei Technologies Co., Ltd.

    发明人： ZHANG, Gong ,  YANG, Xun ,  XIAO, Pei ,  LIN, Zihuai

    IPC分类号： H04B7/02

    CPC分类号： H04L25/03159 ,  H04B7/0434 ,  H04B7/0465 ,  H04B7/0617 ,  H04J11/0063 ,  H04L1/0026 ,  H04L1/0028 ,  H04L1/0036 ,  H04L1/0073 ,  H04L1/0606 ,  H04L25/0204 ,  H04L25/03343 ,  H04L25/03968 ,  H04L27/02 ,  H04L27/2082 ,  H04L27/34 ,  H04L2001/125

    摘要： A precoding method, a precoding apparatus, a Frequency Domain Equalization (FDE) method, and an FDE apparatus are provided in the embodiments of the present invention. The precoding method includes: performing offset modulation for a transmitting signal vector; calculating a precoding matrix according to the offset-modulated transmitting signal vector and a receiver decision signal vector, where the precoding matrix is used for performing precoding for the transmitting signal vector; and performing precoding for the transmitting signal vector according to the precoding matrix. Linear precoding is performed by using the offset-modulated signal on the transmitter, and therefore, the interference caused by multiple antennas and multipath propagation is reduced, the system BER is reduced, and the complexity of implementation is low.

    摘要翻译： 本发明实施例提供了一种预编码方法，预编码装置，频域均衡（FDE）方法和FDE装置。 预编码方法包括：对发射信号向量进行偏移调制; 根据所述偏置调制后的发射信号向量和接收机判决信号向量计算预编码矩阵，所述预编码矩阵用于对所述发射信号向量进行预编码; 根据预编码矩阵对发送信号向量进行预编码。 线性预编码通过在发射机上使用偏移调制信号来执行，因此，由多个天线和多径传播引起的干扰减少，系统BER降低，并且实现的复杂度低。

    FRACTIONAL FREQUENCY AND SAMPLING-RATE CHANGE IN THE FREQUENCY DOMAIN
    69.
    发明公开
    FRACTIONAL FREQUENCY AND SAMPLING-RATE CHANGE IN THE FREQUENCY DOMAIN 审中-公开
    FRAKTIONALFREQUENZ-和采样变动情况频率范围

    公开(公告)号：EP2382747A1

    公开(公告)日：2011-11-02

    申请号：EP09796467.0

    申请日：2009-12-17

    申请人： NXP B.V. ,  Minnis, Brian John

    发明人： MINNIS, Brian John ,  FIFIELD, Robert

    IPC分类号： H04L25/03

    CPC分类号： H04L25/03159

    摘要： An arrangement (30) and a method for digitally filtering a time-discrete digital signal, wherein the signal is transformed to the frequency domain using discrete Fourier transformation (31), the signal is filtered in the frequency domain (33), wherein a filter response can be adapted in real time as required to respond to changes in the interference environment, and the filtered signal is transformed back to the time domain using inverse discrete Fourier transformation (32) to create an output signal, and wherein bin frequencies of said signal in the frequency domain are translated by a real amount and the sampling rate of the output signal is changed by a real factor.

    SYSTEM AND METHOD FOR DIGITAL SUBSCRIBER LOOP CROSSTALK CANCELLATION
    70.
    发明公开
    SYSTEM AND METHOD FOR DIGITAL SUBSCRIBER LOOP CROSSTALK CANCELLATION 审中-公开
    系统和方法数字端TALK还原用户回路

    公开(公告)号：EP2380282A1

    公开(公告)日：2011-10-26

    申请号：EP09835864.1

    申请日：2009-12-23

    申请人： Actelis Networks Ltd.

    发明人： DOMANOVITZ, Elad ,  TSUR, Eitan

    IPC分类号： H04B1/10

    CPC分类号： H04B3/32 ,  H04L5/14 ,  H04L25/0242 ,  H04L25/03159 ,  H04L25/03343 ,  H04M3/304 ,  H04M3/306 ,  H04M3/34 ,  H04M11/062

    摘要： A system and a method for crosstalk cancellation, the method includes: (i) generating estimated crosstalk cancellation matrices for each frequency bin of a group of adjacent frequency bins, wherein each estimated crosstalk cancellation matrix provides an estimation of a crosstalk cancellation that is expected to mitigate crosstalk that is generated at a single frequency bin by an array of transmitters that transmit information over different copper pairs that form a bonded digital subscriber line link; (ii) generating a group crosstalk cancellation matrix based on the estimated crosstalk cancellation matrices, wherein a size of the group crosstalk cancellation matrix is smaller that an aggregate size of the estimated crosstalk cancellation matrices; and (iii) cancelling crosstalk for each frequency bin of the group by utilizing the group crosstalk cancellation matrix.