US 10,020,965 B2Granted

System and method for iterative compensation for linear and nonlinear interference in system employing FTN symbol transmission rates

AssigneeHughes Network Systems, LLC

InventorsBassel Beidas, Rohit Iyer Seshadri, Mustafa Eroz, Lin-Nan Lee

Life of this patent

Estimating the term…

Loading patent…

Abstract

An approach for increasing transmission throughput of a non-linear wireless channel, and efficient decoding of the transmitted signal via a simplified receiver, is provided. A signal reflects a source signal, and includes linear inter-symbol interference based on a faster-than-Nyquist signaling rate and a tight frequency roll-off, and non-linear interference based on high-power amplification for transmission over the wireless channel. The signal is received over a non-linear wireless channel, and is processed via a plurality of decoding iterations. A set of soft information of a current decoding iteration is generated based on a current estimate of the source signal and a final set of soft information from a previous decoding iteration. The current estimate of the source signal is based on an estimate of the linear ISI and the non-linear interference, which is based on the final set of soft information from the previous decoding iteration.

Claims20

Dependent claims

An apparatus comprising:

a receiver configured to process a signal received over a non-linear wireless channel, wherein the received signal reflects a plurality of source signals, each comprising a plurality of source symbols, and includes linear and non-linear interference effects induced based on a faster-than-Nyquist (FTN) signaling rate applied to each of the plurality of source signals and high-power amplification and filtering for transmission over the non-linear wireless channel;
wherein the receiver is configured to estimate the plurality of source symbols of each of one or more of the plurality of source signals of the received signal based on a plurality of outer-loop decoding iterations, wherein a current outer-loop decoding iteration is employed to determine an improved estimate of the plurality of source symbols based on a set of soft information of the current outer-loop decoding iteration, and the improved estimate of the plurality of source symbols is fed to a next outer-loop decoding iteration to further improve the estimate of the plurality of source symbols, and wherein the receiver comprises:
a likelihood metric processor configured to generate the set of soft information of the current outer-loop decoding iteration based on a current estimate of the source symbols and a final set of soft information from a previous outer-loop decoding iteration;
wherein the current estimate of the source symbols is based on a previous estimate of the linear and non-linear interference effects exhibited by the received signal, which is based on the final set of soft information from the previous outer-loop decoding iteration.

1 more element

A method comprising:

processing a signal received over a non-linear wireless channel, wherein the received signal reflects a plurality of source signals, each comprising a plurality of source symbols, and includes linear and non-linear interference effects induced based on a faster-than-Nyquist (FTN) signaling rate applied to each of the plurality of source signals and high-power amplification and filtering for transmission over the non-linear wireless channel;
wherein the processing of the received signal comprises estimating the plurality of source symbols of each of one or more of the plurality of source signals of the received signal based on a plurality of outer-loop decoding iterations, wherein a current outer-loop decoding iteration is employed to determine an improved estimate of the plurality of source symbols based on a set of soft information of the current outer-loop decoding iteration, and the improved estimate of the plurality of source symbols is fed to a next outer-loop decoding iteration to further improve the estimate of the plurality of source symbols, and
wherein the estimation of the plurality of source symbols of each of the one or more of the plurality of source signals of the received signal comprises generating the set of soft information of the current outer-loop decoding iteration based on a current estimate of the source symbols and a final set of soft information from a previous outer-loop decoding iteration;
and
wherein the current estimate of the source symbols is based on a previous estimate of the linear and non-linear interference effects exhibited by the received signal, which is based on the final set of soft information from the previous outer-loop decoding iteration.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application: 15/655,479Filed 20 Jul 2017 · continuation
Priority: 8 Jul 2013
Published: US 2017/0324590 A19 Nov 2017
Granted: 10 Jul 2018
Term ends: Not estimatedThe source records don’t support an estimate.

Classification9 codes

H04L 25/03006
Shaping networks in transmitter or receiver, e.g. adaptive shaping networks: arrangements for removing intersymbol interference
H04L 1/0048
Decoding adapted to other signal detection operation: in conjunction with detection of multiuser or interfering signals, e.g. iteration between…
H04L 1/005
Decoding adapted to other signal detection operation: iterative decoding, including iteration between signal detection and decoding operation
H04L 1/0054
Arrangements at the receiver end: maximum-likelihood or sequential decoding, e.g. Viterbi, Fano, ZJ algorithms

Family

Application61/843,905Us provisional application · filed 8 Jul 2013
Application14/326,418Parent of this continuation · filed 8 Jul 2014
US 9,716,602 B2Parent of this continuation · filed 25 Jul 2017
US 2017/0324590 A1Pre-grant publication · published 9 Nov 2017
US 2015/0010118 A1Published application
US 10,020,965 B2This patent

From the US filing history. Foreign family members aren’t listed.