Search International and National Patent Collections
Some content of this application is unavailable at the moment.
If this situation persists, please contact us atFeedback&Contact
1. (US09548877) Digital communication system

Office : United States of America
Application Number: 14654513 Application Date: 20.12.2013
Publication Number: 09548877 Publication Date: 17.01.2017
Grant Number: 09548877 Grant Date: 17.01.2017
Publication Kind : B2
Prior PCT appl.: Application Number:PCTAU2013001501 ; Publication Number: Click to see the data
IPC:
H04L 27/20
H04L 27/18
H04B 10/516
H03M 13/00
H03M 13/29
H03M 13/37
H03M 13/11
H04L 1/00
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
L
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
27
Modulated-carrier systems
18
Phase-modulated carrier systems, i.e. using phase-shift keying
20
Modulator circuits; Transmitter circuits
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
L
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
27
Modulated-carrier systems
18
Phase-modulated carrier systems, i.e. using phase-shift keying
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
B
TRANSMISSION
10
Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
50
Transmitters
516
Details of coding or modulation
H ELECTRICITY
03
BASIC ELECTRONIC CIRCUITRY
M
CODING, DECODING OR CODE CONVERSION, IN GENERAL
13
Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes
H ELECTRICITY
03
BASIC ELECTRONIC CIRCUITRY
M
CODING, DECODING OR CODE CONVERSION, IN GENERAL
13
Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes
29
combining two or more codes or code structures, e.g. product codes, generalised product codes, concatenated codes, inner and outer codes
H ELECTRICITY
03
BASIC ELECTRONIC CIRCUITRY
M
CODING, DECODING OR CODE CONVERSION, IN GENERAL
13
Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes
37
Decoding methods or techniques, not specific to the particular type of coding provided for in groups H03M13/03-H03M13/35153
H ELECTRICITY
03
BASIC ELECTRONIC CIRCUITRY
M
CODING, DECODING OR CODE CONVERSION, IN GENERAL
13
Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes
03
Error detection or forward error correction by redundancy in data representation, i.e. code words containing more digits than the source words
05
using block codes, i.e. a predetermined number of check bits joined to a predetermined number of information bits
11
using multiple parity bits
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
L
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
1
Arrangements for detecting or preventing errors in the information received
CPC:
H04L 27/18
H03M 13/1157
H03M 13/1197
H03M 13/2909
H03M 13/2957
H03M 13/3784
H03M 13/616
H03M 13/6325
H03M 13/6331
H04B 10/516
H04L 1/0042
H04L 1/005
H04L 1/0057
H04L 1/0065
H04L 27/2003
Applicants: University of South Australia
Inventors: Ingmar Rudiger Land
Gottfried Lechner
Alexander James Grant
David Victor Lawrie Haley
Agents: McDonnell Boehnen Hulbert & Bergoff LLP
Priority Data: 2012905588 20.12.2012 AU
Title: (EN) Digital communication system
Abstract: front page image
(EN)

Methods and apparatus for use in communication systems using recursive modulation schemes with a Low Density Generator Matrix code (including an irregular repeat accumulate (IRA) code) are described that have reduced complexity and thus reduced cost compared to prior art systems. A communication system is described in which the transmitter concatenates a low density generator matrix code with an accumulator followed by a recursive modulator in order to eliminate the use of an interleaver, and in which the receiver combines the decoder for the accumulator and the soft demodulator into a single joint decoder in order reduce the number of components and complexity. Another variation is also described in which the transmitter is further simplified by eliminated the accumulator altogether, and in which the receiver is further simplified by replacing the joint decoder with a soft demodulator prior to the LDGM soft decoder.


Also published as:
CA2893314EP2936689JP2016506661AU2013362820WO/2014/094064