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

Author

Liu, Xiang ; Hanzo, Lajos

Author_Institution

Univ. of Southampton, Southampton

Volume

6

Issue

10

fYear

2007

fDate

10/1/2007 12:00:00 AM

Firstpage

3504

Lastpage

3509

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.

Keywords

Gaussian processes; binary sequences; code division multiple access; error statistics; fading channels; phase shift keying; radiofrequency interference; random sequences; spread spectrum communication; BER performance analysis; asynchronous DS-CDMA system; fading channel; multiple access interference; numerical integration; random spreading sequence; standard Gaussian approximation; Analytical models; Binary phase shift keying; Bit error rate; Closed-form solution; Fading; Gaussian approximation; Multiaccess communication; Multiple access interference; Performance analysis; Signal analysis;

fLanguage

English

Journal_Title

Wireless Communications, IEEE Transactions on

Publisher

ieee

ISSN

1536-1276

Type

jour

DOI

10.1109/TWC.2007.060017

Filename

4350297