Patent
Soft decision decoding with channel equalization
Labedz Gerald P,Borth David Edward,Phillip D. Rasky +2 more
- 24 Sep 1990
72
TL;DR: In this paper, the authors proposed a channel decoding scheme for soft decision decoding in a communications network having time-dispersed signals. But this scheme requires the receiver to receive a time dispersed signal, at least partly equalizing those time dis-persal effects, recovering information contained in the signal, multiplying with that recovered information the absolute value of that atleast partly equalized signal (scaled by a number derived from channel conditions over a time during which at least part of the information to be recovered is distributed).
read more
Abstract: In a communications network having time-dispersed signals, there is provided a mechanism for soft decision decoding. It comprises: radio reception of a time-dispersed signal, at least partly equalizing those time-dispersal effects, recovering information contained in the signal, multiplying with that recovered information the absolute value of that at-least-partly-equalized signal (scaled by a number derived from channel conditions over a time during which at least part of the information to be recovered is distributed), and error-correcting the multiplied information by a Viterbi algorithm channel decoding scheme of error correction. Accordingly, soft decision information is generated from whithin the equalization process itself.
read more
Chat with Paper
AI Agents for this Paper
Find similar papers on Google Scholar, PubMed and Arxiv
Write a critical review of this paper
Analyze citations of this paper to find unaddressed research gaps
Citations
Patent
Methods and apparatus for decoding ldpc codes
Thomas Richardson,Vladimir Novichkov +1 more
- 31 May 2002
TL;DR: In this paper, a message passing decoding technique for low density parity check (LDPC) codes and long codewords is described, which allows decoding graph structures which are largely comprised of multiple identical copies of a much smaller graph.
421
Patent
Node processors for use in parity check decoders
Thomas Richardson,Vladimir Novichkov +1 more
- 07 Oct 2002
TL;DR: In this article, the LDPC decoders are implemented using variable and constraint nodes using an accumulator module (1302), subtractor module(1304), and delay pipeline (1306).
144
Patent
Ldpc encoding methods and apparatus
Thomas Richardson,Hui Jin +1 more
- 20 Jul 2005
TL;DR: In this article, a flexible and relatively hardware efficient LDPC encoder is described, which can switch between encoding codewords of different lengths without the need to change the stored code description information, by simply changing a code lifting factor used to control the encoding processes.
133
Patent
Methods and apparatus for encoding LDPC codes
Hui Jin,Thomas Richardson,Vladimir Novichkov +2 more
- 05 Jul 2005
TL;DR: In this paper, a graph permutation operation can be implemented by simply reordering bits, e.g., using a cyclic permutation, in each set of bits read out of a bit memory so that the bits are passed to processing circuits corresponding to different copies of the small graph.
126
Patent
Automatic simulcast alignment
Howard LeRoy Lester,Sandeep Chennakeshu +1 more
- 20 Jul 1993
TL;DR: In this paper, a decision feedback equalizer (DFE) adaptively equalizes the plurality of received RF signals to substantially correct for a misalignment in time between the received signals.
122
References
•Book
Error control coding : fundamentals and applications
Shu Lin,Daniel J. Costello +1 more
- 01 Jan 1983
TL;DR: This book explains coding for Reliable Digital Transmission and Storage using Trellis-Based Soft-Decision Decoding Algorithms for Linear Block Codes and Convolutional Codes, and some of the techniques used in this work.
5K
Class of algorithms for decoding block codes with channel measurement information
TL;DR: It is shown that as the signal-to-noise ratio (SNR) increases, the asymptotic behavior of these decoding algorithms cannot be improved, and computer simulations indicate that even for SNR the performance of a correlation decoder can be approached by relatively simple decoding procedures.
1.2K
Viterbi Decoding for Satellite and Space Communication
J. Heller,I. Jacobs +1 more
TL;DR: Convolutional coding and Viterbi decoding, along with binary phase-shift keyed modulation, is presented as an efficient system for reliable communication on power limited satellite and space channels.
463
Patent
Private cellular system.
Mahshad Koohgoli,Bambino Fatica +1 more
- 15 Oct 1987
TL;DR: A cellular mobile radio communication (e.g., private cellular system, PCS) that does not have the constraint of being a well defined, pre-planned system was proposed in this paper.
203
Patent
Tdma communications system with adaptive equalization
Borth David E
- 25 Jan 1988
TL;DR: In this paper, the first user message is stored in a data buffer and the adaptive equalization process is performed in non-real time, thereby reducing the required signal processing data rate in any particular receiver.
180