Accurate BER Analysis of QPSK Modulated Asynchronous DS-CDMA Systems Communicating over Rayleigh Channels

Author

Liu, Xiang ; Hanzo, Lajos

Author_Institution

Sch. of Electron. & Comput. Sci., Southampton Univ.

Volume

4

fYear

2006

fDate

7-10 May 2006

Firstpage

1640

Lastpage

1644

Abstract

The accurate average BER calculation of an asynchronous DS-CDMA system using random spreading sequences is studied in Rayleigh fading channels. An accurate closed-form expression is derived for the conditional characteristic function of the multiple access interference. An accurate BER expression is provided, which only requires a single numerical integration. Our numerical simulation results verify its accuracy, and also demonstrate the relative inaccuracy of the Gaussian approximation

Keywords

Rayleigh channels; code division multiple access; error statistics; integration; quadrature phase shift keying; radiofrequency interference; spread spectrum communication; Gaussian approximation; QPSK modulated asynchronous DS-CDMA systems; Rayleigh channels; accurate BER analysis; average BER calculation; closed-form expression; multiple access interference; numerical integration; random spreading sequences; Binary phase shift keying; Bit error rate; Computer science; Fading; Gaussian approximation; Multiaccess communication; Multiple access interference; Performance analysis; Quadrature phase shift keying; Rayleigh channels;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference, 2006. VTC 2006-Spring. IEEE 63rd

Conference_Location

Melbourne, Vic.

ISSN

1550-2252

Print_ISBN

0-7803-9391-0

Electronic_ISBN

1550-2252

Type

conf

DOI

10.1109/VETECS.2006.1683124

Filename

1683124