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    • 4. 发明申请
    • PRECODING DEVICE FOR CANCELLING ASYMMETRICALLY KNOWN INTERFERENCE
    • 用于取消不对称已知干扰的预先设备
    • WO2017101999A1
    • 2017-06-22
    • PCT/EP2015/080080
    • 2015-12-16
    • HUAWEI TECHNOLOGIES CO., LTD.ZAIDI, AbdellatifTOMASIN, Stefano
    • ZAIDI, AbdellatifTOMASIN, Stefano
    • H04L25/03H04L25/497
    • H04L25/03955H04L25/03343H04L25/03974H04L25/4975
    • The disclosure relates to a precoding device (300) for cancelling asymmetrically known interference, the precoding device (300) comprising: a first transmitter node (Tx1) configured to generate a first input signal (X 1 ) carrying a first message (c W1 ) intended for transmission to a first reception node (Rx1); a second transmitter node (Tx2) configured to generate a second input signal (X 2 ) carrying a second message (C W2 ) intended for transmission to the first reception node (Rx1) and an interference signal (X) intended for transmission to another reception node (Rx2), wherein the interference signal (X) is an asymmetrically known interference signal that is known to the second transmitter node (Tx2) and unknown to the first transmitter node (Tx1 ), wherein the second transmitter node (Tx2) comprises: an interference canceller (305) configured to cancel part of the interference signal (X) to generate a partially cancelled interference signal (X c ), and a precoder (303), configured to use a lattice-based precoding scheme to precode the second message (W 2 ) with the non-cancelled part (X nc ) of the interference signal (X) to generate a precoded signal (X 2W ), wherein the second transmitter node (Tx2) is configured to generate the second input signal (X 2 ) based on the partially cancelled interference signal (X c ) and the precoded signal (X 2W ).
    • 本公开涉及用于消除非对称已知干扰的预编码设备(300),所述预编码设备(300)包括:第一发射机节点(Tx1),被配置为生成第一输入信号(X
    • 7. 发明申请
    • INTERPOLATED CHANNEL ESTIMATION FOR MOBILE OFDM SYSTEMS
    • 用于移动OFDM系统的内插信道估计
    • WO2010081896A3
    • 2010-12-02
    • PCT/EP2010050498
    • 2010-01-18
    • ABILIS SYSTEMS SARLBUTUSSI MATTEOTOMASIN STEFANO
    • BUTUSSI MATTEOTOMASIN STEFANO
    • H04L25/02H04L27/26
    • H04L25/0232H04L27/2647
    • In an OFDM system using pilot cells for channel estimation, time interpolation among pilot cells of different OFDM symbols is commonly used to improve the estimate. The estimated channel impulse response is also windowed to further reduce noise and disturbances. However, for a transmission over a time-varying channel, suboptimal time interpolation, implemented with a filter having only a few taps not matched to the maximum Doppler frequency, degrades channel estimation. As aliases can lead to an erroneous estimate of channel duration and consequent errors in windowing, the present invention implements a technique to detect aliases and correct the estimate of channel duration. Parameters of the detection techniques are optimized by an analysis that provides closed-form expressions of the false alarm and miss detection probabilities.
    • 在使用导频小区进行信道估计的OFDM系统中,通常使用不同OFDM符号的导频小区之间的时间内插来改善估计。 估计的信道脉冲响应也被窗口化以进一步减少噪声和干扰。 然而,对于通过时变信道的传输,用仅具有与最大多普勒频率不匹配的几个抽头的滤波器实现的次优时间插值降低了信道估计。 由于别名可能导致频道持续时间的错误估计和随之而来的窗口错误,本发明实现了检测别名并纠正频道持续时间估计的技术。 通过分析提供检测技术的参数,该分析提供虚警和封闭检测概率的闭合表达式。