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Loosely Synchronised Spreading Code Aided Network Performance of Quasi-Synchronous UTRA-like TDD and FDD CDMA Systems

Loosely Synchronised Spreading Code Aided Network Performance of Quasi-Synchronous UTRA-like TDD and FDD CDMA Systems
Loosely Synchronised Spreading Code Aided Network Performance of Quasi-Synchronous UTRA-like TDD and FDD CDMA Systems
It is demonstrated that loosely synchronised (LS) spreading codes exhibit a so-called interference-free window, where both the autocorrelation and cross-correlation of the codes become zero. Therefore LS codes have the promise of mitigating the effects of both inter-symbolinterference and multiple-access-interference in time dispersive channels. Hence, LS codes have the potential of increasing the capacity of CDMA networks. The work reported has studied the achievable network performance and compared it to that of a UTRA-like time division duplex (TDD) and frequency division duplex (FDD) CDMA system using orthogonal variable rate spreading factor codes.
0013-5194
861-863
Ni, S.
c17ef5a0-a786-46ea-8c68-2cddc3c6a9fc
Hua, W.
231c29f0-f398-468c-bdd6-d1b61e8c7cab
Hanzo, L.
66e7266f-3066-4fc0-8391-e000acce71a1
Ni, S.
c17ef5a0-a786-46ea-8c68-2cddc3c6a9fc
Hua, W.
231c29f0-f398-468c-bdd6-d1b61e8c7cab
Hanzo, L.
66e7266f-3066-4fc0-8391-e000acce71a1

Ni, S., Hua, W. and Hanzo, L. (2005) Loosely Synchronised Spreading Code Aided Network Performance of Quasi-Synchronous UTRA-like TDD and FDD CDMA Systems. Electronics Letters, 41 (15), 861-863.

Record type: Article

Abstract

It is demonstrated that loosely synchronised (LS) spreading codes exhibit a so-called interference-free window, where both the autocorrelation and cross-correlation of the codes become zero. Therefore LS codes have the promise of mitigating the effects of both inter-symbolinterference and multiple-access-interference in time dispersive channels. Hence, LS codes have the potential of increasing the capacity of CDMA networks. The work reported has studied the achievable network performance and compared it to that of a UTRA-like time division duplex (TDD) and frequency division duplex (FDD) CDMA system using orthogonal variable rate spreading factor codes.

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Published date: 21 July 2005
Organisations: Southampton Wireless Group

Identifiers

Local EPrints ID: 261646
URI: https://eprints.soton.ac.uk/id/eprint/261646
ISSN: 0013-5194
PURE UUID: f40f58ea-97c9-4e06-aa32-80f767b30387
ORCID for L. Hanzo: ORCID iD orcid.org/0000-0002-2636-5214

Catalogue record

Date deposited: 13 Dec 2005
Last modified: 20 Jul 2019 01:26

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