Title :
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
fDate :
10/1/2007 12:00:00 AM
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;
Journal_Title :
Wireless Communications, IEEE Transactions on
DOI :
10.1109/TWC.2007.060017
