The performance of the M-ary DS/CDMA cellular system over Rayleigh-fading channel with hybrid EGC-SC scheme

Author

Sivanesan, K. ; Lam, W.H.

Author_Institution

Dept. of Electr. & Comput. Eng., Queen´´s Univ., Kingston, Ont., Canada

Volume

6

fYear

2000

fDate

2000

Firstpage

2755

Abstract

The BER performance of M-ary DS/CDMA communication systems armed with hybrid EGC-SC scheme of which the N-th order multipath selection combining in combination with the 2-nd order equal gain diversity combining scheme over a Rayleigh-fading channel has been investigated. The results were compared with that of multipath equal gain combining (EGG) diversity and multipath selection combining diversity (SC). The fading channel is a frequency selective discrete independent slowly fading channel having L number of resolvable paths. The RAKE receiver structure with square law demodulation is used. The system is operated in an asynchronous mode and perfect power control is assumed. The multiple access interference is modeled as Gaussian. Three close form expressions to evaluate the BER performance for the three diversity schemes have been respectively derived. Furthermore, the three close form expressions can also be applied to other similar DS/CDMA systems with M-ary orthogonal modulation at higher transmission chip rate

Keywords

Rayleigh channels; cellular radio; code division multiple access; demodulation; diversity reception; error statistics; multipath channels; multiuser channels; radio receivers; radiofrequency interference; spread spectrum communication; 2-nd order equal gain diversity combining; BER performance; Gaussian interference; M-ary DS/CDMA cellular communication system; M-ary orthogonal modulation; RAKE receiver structure; Rayleigh-fading channel; asynchronous mode; close form expressions; discrete independent slowly fading channel; frequency selective fading channel; hybrid EGC-SC scheme; multipath equal gain combining diversity; multipath selection combining; multipath selection combining diversity; multiple access interference; perfect power control; square law demodulation; transmission chip rate; Bit error rate; Demodulation; Diversity reception; Fading; Frequency; Multiaccess communication; Multipath channels; Performance gain; Power control; Rayleigh channels;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference, 2000. IEEE-VTS Fall VTC 2000. 52nd

Conference_Location

Boston, MA

ISSN

1090-3038

Print_ISBN

0-7803-6507-0

Type

conf

DOI

10.1109/VETECF.2000.886821

Filename

886821