Exact BER Performance of Asynchronous MC-DS-CDMA over Nakagami-m Fading Channels

Author

Smida, Besma ; Hanzo, Lajos ; Affes, Sofiéne

Author_Institution

Harvard Univ., Cambridge

fYear

2008

fDate

March 31 2008-April 3 2008

Firstpage

964

Lastpage

968

Abstract

In this contribution an accurate average bit error rate (BER) formula is derived for Nakagami-faded MC-DS-CDMA in the context of asynchronous transmissions and random spreading sequences. Our analysis is based on the Characteristic Function (CF) and does not rely on any assumption concerning the statistical behavior of the interference. We develop a new closed-form expression for the conditional CF of the inter-carrier interference and provide a procedure for calculating the exact BER expressed in the form of a single numerical integration. The accuracy of the standard Gaussian approximation (SGA) technique is also evaluated. Link-level results confirm the accuracy of the SGA for most practical conditions.

Keywords

Gaussian processes; Nakagami channels; approximation theory; code division multiple access; error statistics; Nakagami-m fading channel; asynchronous MC-DS-CDMA; asynchronous transmission; average bit error rate performance; characteristic function; inter-carrier interference; numerical integration; random spreading sequence; standard Gaussian approximation; Bit error rate; Closed-form solution; Communications Society; Fading; Gaussian approximation; Intersymbol interference; Multiaccess communication; Multiple access interference; Random sequences; USA Councils;

fLanguage

English

Publisher

ieee

Conference_Titel

Wireless Communications and Networking Conference, 2008. WCNC 2008. IEEE

Conference_Location

Las Vegas, NV

ISSN

1525-3511

Print_ISBN

978-1-4244-1997-5

Type

conf

DOI

10.1109/WCNC.2008.175

Filename

4489206