Interference whitening receivers for bandlimited DS-CDMA systems in Nakagami fading

Author

Sivanesan, K. ; Beaulieu, Norman C.

Author_Institution

Dept. of Electr. & Comput. Eng., Alberta Univ., Edmonton, Alta., Canada

Volume

1

fYear

2005

fDate

13-17 March 2005

Firstpage

297

Abstract

A whitening matched filter receiver for multiple access interference suppression is considered for a bandlimited DS-CDMA system in Nakagami fading. The whitening matched filter, while maximizing the signal-to-noise-plus-interference ratio, introduces intersymbol interference in the decision statistic. A fractionally spaced linear MMSE equalizer is introduced to combat the intersymbol interference. The Beaulieu-Tan-Damen pulse and the conventional spectrum raised-cosine pulse are employed as chip pulse shapes. Asynchronous timing and slow flat fading are assumed. The precise BER expressions are derived using characteristic function and Fourier series methods.

Keywords

Fourier series; code division multiple access; equalisers; error statistics; fading channels; filtering theory; interference suppression; intersymbol interference; least mean squares methods; matched filters; multipath channels; optimisation; radio receivers; radiofrequency interference; spread spectrum communication; timing; BER; Beaulieu-Tan-Damen pulse shape; Fourier series method; Nakagami fading; SINR maximization; asynchronous timing; bandlimited DS-CDMA systems; characteristic function method; decision statistic; interference whitening receivers; intersymbol interference; linear MMSE equalizer; linear equalizer; multipath fading; multiple access interference suppression; signal-to-noise-plus-interference ratio maximization; slow flat fading; spectrum raised-cosine pulse shape; whitening matched filter receiver; Equalizers; Fading; Intersymbol interference; Matched filters; Multiaccess communication; Multiple access interference; Pulse shaping methods; Shape; Statistics; Timing;

fLanguage

English

Publisher

ieee

Conference_Titel

Wireless Communications and Networking Conference, 2005 IEEE

ISSN

1525-3511

Print_ISBN

0-7803-8966-2

Type

conf

DOI

10.1109/WCNC.2005.1424516

Filename

1424516