Title :
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
fDate :
March 31 2008-April 3 2008
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;
Conference_Titel :
Wireless Communications and Networking Conference, 2008. WCNC 2008. IEEE
Conference_Location :
Las Vegas, NV
Print_ISBN :
978-1-4244-1997-5
DOI :
10.1109/WCNC.2008.175
