公开(公告)号：WO2017181269A1

公开(公告)日：2017-10-26

申请号：PCT/CA2017/050203

申请日：2017-02-16

Applicant: HUAWEI TECHNOLOGIES CANADA CO., LTD.

Inventor： JANA, Mrinmoy ,  MITRA, Jeebak ,  LAMPE, Lutz Hans-Joachim ,  MEDRA, Ahmed Mohamed Ibrahim

IPC: H04L25/03 ,  H03M13/03 ,  H04B10/508 ,  H04B10/61

CPC classification number: H04B7/0456 ,  H04B7/0413 ,  H04B7/0417 ,  H04B7/10 ,  H04L1/00 ,  H04L25/03343 ,  H04L25/03834 ,  H04L25/4975

Abstract: Systems and methods of precoded faster than Nyquist (FTN) signalling are provided. In the transmitter, Tomlinson-Harashima Precoding (THP) is applied to produce precoded symbols. The THP is based on inter-symbol interference (ISI) due to using faster than Nyquist (FTN) signalling. An inverse modulo operation is not performed in the receiver. Instead, in the receiver, FTN processing is performed based on a matched filter output by determining log a-posteriori probability ratio LAPPR values computed for an n th bit bn of a k th received symbol and pre-computed a-priori probabilities of an extended constellation for a given pulse shape h(t) and FTN acceleration factor combination.

Abstract translation: 提供了比奈奎斯特（Nyquist）（FTN）信令更快的预编码系统和方法。 在发射机中，Tomlinson-Harashima预编码（THP）被用于产生预编码的符号。 由于使用比奈奎斯特（FTN）信号更快的速率，THP基于符号间干扰（ISI）。 在接收器中不执行逆模运算。 相反，在接收机中，通过确定对于第k个第n个比特的第n比特计算的对数 - 后验概率比LAPPR值，基于匹配的滤波器输出来执行FTN处理。 接收的符号以及针对给定脉冲形状h（t）和FTN加速因子组合的扩展星座的预先计算的先验概率。

公开(公告)号：WO2019153072A1

公开(公告)日：2019-08-15

申请号：PCT/CA2019/050099

申请日：2019-01-28

Applicant: HUAWEI TECHNOLOGIES CANADA CO., LTD

Inventor： JANA, Mrinmoy ,  MITRA, Jeebak ,  LAMPE, Lutz Hans-Joachim

IPC: H04B7/0456 ,  H01Q21/28 ,  H03H17/02 ,  H04B7/005 ,  H04L27/34

Abstract: An interference mitigation apparatus, comprising: an adaptive feedforward filtering stage and an adaptive feedback filtering stage configured to produce a plurality of output signals from a plurality of frequency downconverted signals, the output signals for being provided to a data decoding stage; a plurality of phase rotators configured to apply phase rotation to the frequency downconverted signals prior to processing by the adaptive feedforward filtering stage and the adaptive feedback filtering stage; and an adaptive controller configured for varying an amount of the phase rotation applied by the phase rotators to the frequency downconverted signals based at least in part on symbol decisions made on the output signals. There may be second phase rotators configured to apply phase rotation after the adaptive feedforward filtering stage so as to produce the output signals for forwarding to the data decoding stage.