Walsh-LS CDMA systems

Peter G. Conti; Upul Gunawardana; Ranjith Liyanapathirana; Qi Cheng; Chin Jian Leo; Athula Ginige; Vincent Higgins

Walsh-LS CDMA systems

Peter G. Conti, Upul Gunawardana, Ranjith Liyanapathirana, Qi Cheng, Chin Jian Leo, Athula Ginige, Vincent Higgins

Research output: Chapter in Book / Conference Paper › Conference Paper

Abstract

![CDATA[Due to the existence of an Interference-Free-Window (IFW) or Zero-Correlation-Zone (ZCZ), a Large Area Synchronous-CDMA (LAS-CDMA) system can have a much higher system capacity and spectral efficiency than traditional CDMA. The more multi-path spreads falling in the ZCZ the greater the reduction of Inter-symbol Interference (ISI) and multiple access interference (MAI). In this paper an introduction to a CDMA forward link concept employing loosely synchronous (LS) codes and Walsh codes is presented. The LS codes are used for distinguishing cells and sectors while the individual users are separated using Walsh codes. The resulting correlation functions exhibit a ZCZ. The proposed design allows for a ZCZ that can be more easily and dynamically adjusted to cover the majority or all of the multi-path spread. The use of Walsh to separate the users places less stress on finding large family sizes of LS codes. This paper is organised as follows, a section on construction and properties of Walsh-LS spreading codes, a section on the system simulation model and the simulation results followed lastly by a conclusion.]]

Original language	English
Title of host publication	Proceedings of the Innovation Conference 2005, Werrington South Precinct, Penrith Campus, 7-8 June 2005
Publisher	University of Western Sydney
Number of pages	2
ISBN (Print)	1741080835
Publication status	Published - 2005
Event	University of Western Sydney. College of Science Technology and Environment. Innovation Conference - Duration: 1 Jan 2005 → …

Conference

Conference	University of Western Sydney. College of Science Technology and Environment. Innovation Conference
Period	1/01/05 → …

Keywords

code division multiple access
mobile communication systems
Walsh codes
LS codes
LAS-CDMA
CDMA

Cite this

@inproceedings{076070960b7b484db40c45a85ed1e611,

title = "Walsh-LS CDMA systems",

abstract = "![CDATA[Due to the existence of an Interference-Free-Window (IFW) or Zero-Correlation-Zone (ZCZ), a Large Area Synchronous-CDMA (LAS-CDMA) system can have a much higher system capacity and spectral efficiency than traditional CDMA. The more multi-path spreads falling in the ZCZ the greater the reduction of Inter-symbol Interference (ISI) and multiple access interference (MAI). In this paper an introduction to a CDMA forward link concept employing loosely synchronous (LS) codes and Walsh codes is presented. The LS codes are used for distinguishing cells and sectors while the individual users are separated using Walsh codes. The resulting correlation functions exhibit a ZCZ. The proposed design allows for a ZCZ that can be more easily and dynamically adjusted to cover the majority or all of the multi-path spread. The use of Walsh to separate the users places less stress on finding large family sizes of LS codes. This paper is organised as follows, a section on construction and properties of Walsh-LS spreading codes, a section on the system simulation model and the simulation results followed lastly by a conclusion.]]",

keywords = "code division multiple access, mobile communication systems, Walsh codes, LS codes, LAS-CDMA, CDMA",

author = "Conti, {Peter G.} and Upul Gunawardana and Ranjith Liyanapathirana and Qi Cheng and Leo, {Chin Jian} and Athula Ginige and Vincent Higgins",

year = "2005",

language = "English",

isbn = "1741080835",

booktitle = "Proceedings of the Innovation Conference 2005, Werrington South Precinct, Penrith Campus, 7-8 June 2005",

publisher = "University of Western Sydney",

note = "University of Western Sydney. College of Science Technology and Environment. Innovation Conference ; Conference date: 01-01-2005",

}

TY - GEN

T1 - Walsh-LS CDMA systems

AU - Conti, Peter G.

AU - Gunawardana, Upul

AU - Liyanapathirana, Ranjith

AU - Cheng, Qi

AU - Leo, Chin Jian

AU - Ginige, Athula

AU - Higgins, Vincent

PY - 2005

Y1 - 2005

N2 - ![CDATA[Due to the existence of an Interference-Free-Window (IFW) or Zero-Correlation-Zone (ZCZ), a Large Area Synchronous-CDMA (LAS-CDMA) system can have a much higher system capacity and spectral efficiency than traditional CDMA. The more multi-path spreads falling in the ZCZ the greater the reduction of Inter-symbol Interference (ISI) and multiple access interference (MAI). In this paper an introduction to a CDMA forward link concept employing loosely synchronous (LS) codes and Walsh codes is presented. The LS codes are used for distinguishing cells and sectors while the individual users are separated using Walsh codes. The resulting correlation functions exhibit a ZCZ. The proposed design allows for a ZCZ that can be more easily and dynamically adjusted to cover the majority or all of the multi-path spread. The use of Walsh to separate the users places less stress on finding large family sizes of LS codes. This paper is organised as follows, a section on construction and properties of Walsh-LS spreading codes, a section on the system simulation model and the simulation results followed lastly by a conclusion.]]

AB - ![CDATA[Due to the existence of an Interference-Free-Window (IFW) or Zero-Correlation-Zone (ZCZ), a Large Area Synchronous-CDMA (LAS-CDMA) system can have a much higher system capacity and spectral efficiency than traditional CDMA. The more multi-path spreads falling in the ZCZ the greater the reduction of Inter-symbol Interference (ISI) and multiple access interference (MAI). In this paper an introduction to a CDMA forward link concept employing loosely synchronous (LS) codes and Walsh codes is presented. The LS codes are used for distinguishing cells and sectors while the individual users are separated using Walsh codes. The resulting correlation functions exhibit a ZCZ. The proposed design allows for a ZCZ that can be more easily and dynamically adjusted to cover the majority or all of the multi-path spread. The use of Walsh to separate the users places less stress on finding large family sizes of LS codes. This paper is organised as follows, a section on construction and properties of Walsh-LS spreading codes, a section on the system simulation model and the simulation results followed lastly by a conclusion.]]

KW - code division multiple access

KW - mobile communication systems

KW - Walsh codes

KW - LS codes

KW - LAS-CDMA

KW - CDMA

UR - http://handle.uws.edu.au:8081/1959.7/40616

M3 - Conference Paper

SN - 1741080835

BT - Proceedings of the Innovation Conference 2005, Werrington South Precinct, Penrith Campus, 7-8 June 2005

PB - University of Western Sydney

T2 - University of Western Sydney. College of Science Technology and Environment. Innovation Conference

Y2 - 1 January 2005

ER -

Walsh-LS CDMA systems

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Keywords

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