WO2003001731A8 - Cooperative code-enhanced multi-user communications system - Google Patents

Cooperative code-enhanced multi-user communications system

Info

Publication number
WO2003001731A8
WO2003001731A8 PCT/US2002/019828 US0219828W WO03001731A8 WO 2003001731 A8 WO2003001731 A8 WO 2003001731A8 US 0219828 W US0219828 W US 0219828W WO 03001731 A8 WO03001731 A8 WO 03001731A8
Authority
WO
WIPO (PCT)
Prior art keywords
bit
bit sum
communications system
receiver
pseudo
Prior art date
Application number
PCT/US2002/019828
Other languages
French (fr)
Other versions
WO2003001731A1 (en
Inventor
Alan M Bartlett
Alan Chan
Original Assignee
Bae Systems Information
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bae Systems Information filed Critical Bae Systems Information
Priority to EP02746634A priority Critical patent/EP1397882A4/en
Publication of WO2003001731A1 publication Critical patent/WO2003001731A1/en
Publication of WO2003001731A8 publication Critical patent/WO2003001731A8/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/02—Channels characterised by the type of signal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/69—Spread spectrum techniques
    • H04B1/707—Spread spectrum techniques using direct sequence modulation
    • H04B1/7097—Interference-related aspects
    • H04B1/7103—Interference-related aspects the interference being multiple access interference
    • H04B1/7105—Joint detection techniques, e.g. linear detectors
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0045—Arrangements at the receiver end
    • H04L1/0047—Decoding adapted to other signal detection operation
    • H04L1/0048—Decoding adapted to other signal detection operation in conjunction with detection of multiuser or interfering signals, e.g. iteration between CDMA or MIMO detector and FEC decoder
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0045—Arrangements at the receiver end
    • H04L1/0054—Maximum-likelihood or sequential decoding, e.g. Viterbi, Fano, ZJ algorithms
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
    • H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
    • H04L27/38—Demodulator circuits; Receiver circuits

Abstract

A cooperative code-multiuser communications system having a receiver (16) for solving user ambiguity in a received composite signal by using convolutional encoder (151, 152, ... 15k) state machine properties to analyze strings of bit sums and separate out individual user data. The receiver (16) comprises a signal sampler (26) which converts a received composite signal to a digital data. A single point cluster mapper (28) determines a closest pseudo-constellation point, and the pseudo-constellation point is formed with the aid of power and timing control in the transmitter (1). A bit sum look-up table (32) maps symbol points to bit sums. A deterministic loop tests for bit sum cases where symbols can be determined immediately. A guess loop tests the bit sum after the deterministic loop test and performs guesses until all bits are decided. The bit sum (58) is provided to a multiuser convolutional decoder (36) to decide all user data streams.
PCT/US2002/019828 2001-06-21 2002-06-21 Cooperative code-enhanced multi-user communications system WO2003001731A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP02746634A EP1397882A4 (en) 2001-06-21 2002-06-21 Cooperative code-enhanced multi-user communications system

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US29993401P 2001-06-21 2001-06-21
US60/299,934 2001-06-21
US10/175,693 2002-06-20
US10/175,693 US7139334B2 (en) 2001-06-21 2002-06-20 Cooperative code-enhanced multi-user communications system

Publications (2)

Publication Number Publication Date
WO2003001731A1 WO2003001731A1 (en) 2003-01-03
WO2003001731A8 true WO2003001731A8 (en) 2003-07-24

Family

ID=26871486

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2002/019828 WO2003001731A1 (en) 2001-06-21 2002-06-21 Cooperative code-enhanced multi-user communications system

Country Status (3)

Country Link
US (1) US7139334B2 (en)
EP (1) EP1397882A4 (en)
WO (1) WO2003001731A1 (en)

Families Citing this family (18)

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US7092464B2 (en) * 2002-01-23 2006-08-15 Bae Systems Information And Electronic Systems Integration Inc. Multiuser detection with targeted error correction coding
US6831574B1 (en) * 2003-10-03 2004-12-14 Bae Systems Information And Electronic Systems Integration Inc Multi-turbo multi-user detector
US6985699B2 (en) * 2003-04-16 2006-01-10 Bae Systems Information And Electronic Systems Integration Inc. Efficient and optimal channel encoding and channel decoding in a multiple access communications system
KR100981552B1 (en) * 2005-06-21 2010-09-10 삼성전자주식회사 Apparatus and method for transmitting/receiving uplink pilot in frequency division multiple access system
EP1931511A4 (en) * 2005-10-06 2013-12-04 Signext Wireless Ltd Joint constellation multiple access
US7885289B2 (en) * 2006-12-19 2011-02-08 Lockheed Martin Corporation System and method for relaying turbo-coded piggyback messages
US8483240B2 (en) * 2006-12-19 2013-07-09 Lockheed Martin Corporation Piggyback networks
WO2009087742A1 (en) 2008-01-04 2009-07-16 Panasonic Corporation Radio communication base station device, radio communication mobile station device, and control channel allocation method
KR101651568B1 (en) * 2009-10-27 2016-09-06 삼성전자주식회사 Apparatus and method for three-dimensional space interface
US9467879B2 (en) * 2015-02-03 2016-10-11 The Boeing Company Automated close-loop electromagnetic (EM) datalink testing
CN105071988A (en) * 2015-07-28 2015-11-18 武汉虹信通信技术有限责任公司 Multi-user test system and method
US11824694B2 (en) 2015-09-02 2023-11-21 Astrapi Corporation Systems, devices, and methods employing instantaneous spectral analysis in the transmission of signals
EP3345359A4 (en) 2015-09-02 2019-04-17 Astrapi Corporation Spiral polynomial division multiplexing
US10069664B2 (en) * 2015-09-02 2018-09-04 Astrapi Corporation Spiral polynomial division multiplexing
US10979271B2 (en) 2016-05-23 2021-04-13 Astrapi Corporation Method for waveform bandwidth compression
US10848364B2 (en) 2019-03-06 2020-11-24 Astrapi Corporation Devices, systems, and methods employing polynomial symbol waveforms
US10931403B2 (en) 2019-05-15 2021-02-23 Astrapi Corporation Communication devices, systems, software and methods employing symbol waveform hopping
US11184201B2 (en) 2019-05-15 2021-11-23 Astrapi Corporation Communication devices, systems, software and methods employing symbol waveform hopping

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Publication number Priority date Publication date Assignee Title
US5222077A (en) * 1991-04-09 1993-06-22 Racal-Datacom, Inc. Radix mapping with variable number of symbols in mapping period
US5311547A (en) * 1992-02-03 1994-05-10 At&T Bell Laboratories Partial-response-channel precoding
US5475713A (en) * 1993-06-14 1995-12-12 At&T Corp. Shaped signal spaces in a simultaneous voice and data system
US5790606A (en) 1994-01-11 1998-08-04 Ericsson Inc. Joint demodulation using spatial maximum likelihood
ZA965340B (en) * 1995-06-30 1997-01-27 Interdigital Tech Corp Code division multiple access (cdma) communication system
US5796716A (en) * 1995-11-27 1998-08-18 Paradyne Corporation Method and apparatus for simultaneous voice/data transmission
CA2209400A1 (en) 1996-07-17 1998-01-17 Roke Manor Research Limited Improvements in or relating to packet radio systems
US5982813A (en) 1996-09-30 1999-11-09 Amsc Subsidiary Corporation Demand-based power and data rate adjustments to a transmitter to optimize channel capacity and power usage with respect to data transmission traffic over a fixed-bandwidth channel
US6219341B1 (en) 1997-03-20 2001-04-17 University Technology Corporation Method for bandwidth efficient multiple access wireless communication
US5917852A (en) 1997-06-11 1999-06-29 L-3 Communications Corporation Data scrambling system and method and communications system incorporating same
WO1998059423A1 (en) 1997-06-23 1998-12-30 Siemens Aktiengesellschaft Method and device for source-controlled channel decoding using a kalman filter
US5966412A (en) * 1997-06-30 1999-10-12 Thomson Consumer Electronics, Inc. Apparatus and method for processing a Quadrature Amplitude Modulated (QAM) signal
US6078626A (en) 1997-09-24 2000-06-20 Ericsson Inc. Methods and systems for communicating information using separable modulation constellations
US6198775B1 (en) 1998-04-28 2001-03-06 Ericsson Inc. Transmit diversity method, systems, and terminals using scramble coding
US6343210B1 (en) 1999-03-22 2002-01-29 Motorola, Inc. Method and system for soft decision propagation
US6934317B1 (en) * 2000-10-11 2005-08-23 Ericsson Inc. Systems and methods for communicating spread spectrum signals using variable signal constellations

Also Published As

Publication number Publication date
EP1397882A1 (en) 2004-03-17
EP1397882A4 (en) 2007-04-04
US20030026357A1 (en) 2003-02-06
US7139334B2 (en) 2006-11-21
WO2003001731A1 (en) 2003-01-03

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