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Analytical BER Performance of DS-CDMA Ad Hoc Networks using Large Area Synchronized Spreading Codes

Analytical BER Performance of DS-CDMA Ad Hoc Networks using Large Area Synchronized Spreading Codes
Analytical BER Performance of DS-CDMA Ad Hoc Networks using Large Area Synchronized Spreading Codes
The family of operational CDMA systems is interference-limited owing to the Inter Symbol Interference (ISI) and the Multiple Access Interference (MAI) encountered. They are interference-limited, because the orthogonality of the spreading codes is typically destroyed by the frequency-selective fading channel and hence complex multiuser detectors have to be used for mitigating these impairments. By contrast, the family of Large Area Synchronous (LAS) codes exhibits an Interference Free Window (IFW), which renders them attractive for employment in cost-efficient quasi-synchronous ad hoc networks dispensing with power control. In this contribution we investigate the performance of LAS DS-CDMA assisted ad hoc networks in the context of a simple infinite mesh of rectilinear node topology and benchmark it against classic DS-CDMA using both random spreading sequences as well as Walsh-Hadamard and Orthogonal Gold codes. It is demonstrated that LAS DS-CDMA exhibits a significantly better performance than the family of classic DS-CDMA systems operating in a quasi-synchronous scenario associated with a high node density, a low number of resolvable paths and a sufficiently high number of RAKE receiver branches.
249-253
Liu, X.
878efcac-76c6-4ca0-8f4a-425f1e9abdac
Hua, W.
231c29f0-f398-468c-bdd6-d1b61e8c7cab
Hanzo, L.
66e7266f-3066-4fc0-8391-e000acce71a1
Liu, X.
878efcac-76c6-4ca0-8f4a-425f1e9abdac
Hua, W.
231c29f0-f398-468c-bdd6-d1b61e8c7cab
Hanzo, L.
66e7266f-3066-4fc0-8391-e000acce71a1

Liu, X., Hua, W. and Hanzo, L. (2005) Analytical BER Performance of DS-CDMA Ad Hoc Networks using Large Area Synchronized Spreading Codes. IEE 3G and Beyond, United Kingdom. 07 - 09 Nov 2005. pp. 249-253 .

Record type: Conference or Workshop Item (Paper)

Abstract

The family of operational CDMA systems is interference-limited owing to the Inter Symbol Interference (ISI) and the Multiple Access Interference (MAI) encountered. They are interference-limited, because the orthogonality of the spreading codes is typically destroyed by the frequency-selective fading channel and hence complex multiuser detectors have to be used for mitigating these impairments. By contrast, the family of Large Area Synchronous (LAS) codes exhibits an Interference Free Window (IFW), which renders them attractive for employment in cost-efficient quasi-synchronous ad hoc networks dispensing with power control. In this contribution we investigate the performance of LAS DS-CDMA assisted ad hoc networks in the context of a simple infinite mesh of rectilinear node topology and benchmark it against classic DS-CDMA using both random spreading sequences as well as Walsh-Hadamard and Orthogonal Gold codes. It is demonstrated that LAS DS-CDMA exhibits a significantly better performance than the family of classic DS-CDMA systems operating in a quasi-synchronous scenario associated with a high node density, a low number of resolvable paths and a sufficiently high number of RAKE receiver branches.

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More information

Published date: 2005
Additional Information: Event Dates: 7-9 November 2005
Venue - Dates: IEE 3G and Beyond, United Kingdom, 2005-11-07 - 2005-11-09
Organisations: Southampton Wireless Group

Identifiers

Local EPrints ID: 261681
URI: https://eprints.soton.ac.uk/id/eprint/261681
PURE UUID: 4dda1677-de4a-4eca-8b7b-9ec89466454f
ORCID for L. Hanzo: ORCID iD orcid.org/0000-0002-2636-5214

Catalogue record

Date deposited: 15 Dec 2005
Last modified: 06 Jun 2018 13:14

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