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A Unified Exact BER Performance Analysis of Asynchronous DS-CDMA Systems Using BPSK Modulation over Fading Channels

A Unified Exact BER Performance Analysis of Asynchronous DS-CDMA Systems Using BPSK Modulation over Fading Channels
A Unified Exact BER Performance Analysis of Asynchronous DS-CDMA Systems Using BPSK Modulation over Fading Channels
Abstract—An asynchronous binary DS-CDMA system using random spreading sequences is considered when communicating over various fading channels. New closed-form expressions are derived for the conditional Characteristic Function (CF) of the multiple access interference. A unified analysis is provided for calculating the exact average Bit Error Rate (BER) expressed in the form of a single numerical integration based on the CF approach. The numerical results obtained from our exact BER analysis are verified by our simulation results and are also compared to those obtained by the Standard Gaussian Approximation (SGA), confirming the accuracy of the SGA for most practical conditions, except for high Signal-to-Noise Ratios (SNR) and for a low number of interferers. Index Terms—BER analysis, CDMA, fading, Rayleigh, Ricean, Hoyt, Nakagami-m, random spreading sequence.
3504-3509
Liu, Xiang
06e6c14a-a906-49e3-9b4e-cfdd15b13c1b
Hanzo, Lajos
66e7266f-3066-4fc0-8391-e000acce71a1
Liu, Xiang
06e6c14a-a906-49e3-9b4e-cfdd15b13c1b
Hanzo, Lajos
66e7266f-3066-4fc0-8391-e000acce71a1

Liu, Xiang and Hanzo, Lajos (2007) A Unified Exact BER Performance Analysis of Asynchronous DS-CDMA Systems Using BPSK Modulation over Fading Channels. IEEE Transactions on Wireless Communications, 3504-3509.

Record type: Article

Abstract

Abstract—An asynchronous binary DS-CDMA system using random spreading sequences is considered when communicating over various fading channels. New closed-form expressions are derived for the conditional Characteristic Function (CF) of the multiple access interference. A unified analysis is provided for calculating the exact average Bit Error Rate (BER) expressed in the form of a single numerical integration based on the CF approach. The numerical results obtained from our exact BER analysis are verified by our simulation results and are also compared to those obtained by the Standard Gaussian Approximation (SGA), confirming the accuracy of the SGA for most practical conditions, except for high Signal-to-Noise Ratios (SNR) and for a low number of interferers. Index Terms—BER analysis, CDMA, fading, Rayleigh, Ricean, Hoyt, Nakagami-m, random spreading sequence.

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Published date: October 2007
Organisations: Southampton Wireless Group

Identifiers

Local EPrints ID: 264960
URI: http://eprints.soton.ac.uk/id/eprint/264960
PURE UUID: c150f5ed-a8ae-472f-9d87-1ae2ceeca3fb
ORCID for Lajos Hanzo: ORCID iD orcid.org/0000-0002-2636-5214

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Date deposited: 12 Dec 2007 17:11
Last modified: 20 Jul 2019 01:26

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