公开(公告)号：WO2017177327A1

公开(公告)日：2017-10-19

申请号：PCT/CA2017/050449

申请日：2017-04-12

Applicant: HUAWEI TECHNOLOGIES CANADA CO., LTD.

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

IPC: H03M13/31 ,  H04L27/00

Abstract: Systems and methods are disclosed that attempt to increase spectral efficiency by using Faster- than-Nyquist (FTN) transmission. In one embodiment, a method at a transmitter includes partitioning bits into K bit streams, obtaining K power scaled symbol streams, combining the K power scaled symbol streams to obtain a stream of transmission symbols, and transmitting the stream of transmission symbols using FTN signaling. At the receiver, the received symbols are partitioned into K symbol streams, and demodulation and decoding is performed by: (i) demodulating and decoding the K th symbol stream of the K symbol streams to obtain a K th set of bits; (ii) mapping the K th set of bits to a K th set of symbols; and (iii) for each one of k = K— 1,...,1: demodulating and decoding a k th symbol stream of the K symbol streams to obtain a k th set of bits. The demodulating and decoding includes performing interference cancellation.

Abstract translation: 公开了通过使用比奈奎斯特（FTN）传输更高的频谱效率的系统和方法。 在一个实施例中，发射机处的方法包括将比特划分为K比特流，获得K个功率缩放符号流，组合K个功率缩放符号流以获得 传输符号，并使用FTN信令传输传输符号流。 在接收机处，接收符号被分割成K个符号流，并且解调和解码通过以下方式来执行：（i）解调和解码K个符号流， K个符号流的第n个符号流，以获得第K个第位组; （ii）将第K个比特集合映射到第K个第i个比特集合， i> 符号集; 以及（iii）对于k = K-1，...，1中的每一个：解调和解码第k个符号流 K 符号流以获得第k组第二位。 解调和解码包括执行干扰消除。

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.

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。