公开(公告)号：US20190245718A1

公开(公告)日：2019-08-08

申请号：US15889919

申请日：2018-02-06

申请人： MRINMOY JANA ,  JEEBAK MITRA ,  LUTZ HANS-JOACHIM LAMPE

发明人： MRINMOY JANA ,  JEEBAK MITRA ,  LUTZ HANS-JOACHIM LAMPE

IPC分类号： H04L25/03 ,  H04B7/0408

CPC分类号： H04L25/03057 ,  H04B7/0408 ,  H04L25/03038 ,  H04L25/03343 ,  H04L2025/03573

摘要： 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：US20170310373A1

公开(公告)日：2017-10-26

申请号：US15341227

申请日：2016-11-02

申请人： MRINMOY JANA ,  JEEBAK MITRA ,  LUTZ HANS-JOACHIM LAMPE ,  AHMED MOHAMED IBRAHIM MEDRA

发明人： MRINMOY JANA ,  JEEBAK MITRA ,  LUTZ HANS-JOACHIM LAMPE ,  AHMED MOHAMED IBRAHIM MEDRA

IPC分类号： H04B7/0456 ,  H04L25/03 ,  H04B7/0417

CPC分类号： H04B7/0456 ,  H04B7/0413 ,  H04B7/0417 ,  H04B7/10 ,  H04L25/03343 ,  H04L25/03834 ,  H04L25/4975

摘要： Systems and methods of precoded faster than Nyquist (FTN) signalling are provided. In the transmitter, Tomlinson-Harashima Preceding (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 nth bit bn of a kth received symbol and pre-computed a-priori probabilities of an extended constellation for a given pulse shape h(t) and FTN acceleration factor combination.