Outage performance in cooperative CDMA systems over nakagami-m fading channels

Author

Mehemed, Ali ; Hamouda, Walaa

Author_Institution

Dept. of Electr. & Comput. Eng., Concordia Univ., Montréal, QC, Canada

fYear

2011

fDate

11-14 Sept. 2011

Firstpage

1904

Lastpage

1908

Abstract

The performance of decode-and-forward (DAF) cooperative code-division multiple-access (CDMA) systems is analyzed in Nakagami fading channels. A closed-form expression for the cumulative distribution function (CDF) is derived based on of the sum of two independent non-identical distributed gamma random variables (RV). This expression is then used to obtain the outage probability. In our analysis we consider both perfect and non-perfect inter-user channels. We also investigate the behavior of the system at high signal-to-noise ratio (SNR) where we obtain asymptotically the achievable diversity order for various system parameters. Simulation results are presented to assess the accuracy of our analytical results.

Keywords

Nakagami channels; code division multiple access; decode and forward communication; error statistics; CDF; DAF cooperative code-division multiple-access; Nakagami fading channels; cooperative CDMA systems; cumulative distribution function; decode-and-forward CDMA systems; nonidentical distributed gamma random variables; nonperfect inter-user channels; outage probability; Base stations; Diversity reception; Fading; Multiaccess communication; Relays; Signal to noise ratio; Wireless communication;

fLanguage

English

Publisher

ieee

Conference_Titel

Personal Indoor and Mobile Radio Communications (PIMRC), 2011 IEEE 22nd International Symposium on

Conference_Location

Toronto, ON

ISSN

pending

Print_ISBN

978-1-4577-1346-0

Electronic_ISBN

pending

Type

conf

DOI

10.1109/PIMRC.2011.6139841

Filename

6139841