Title :
Accurate BER Analysis of QPSK Modulated Asynchronous DS-CDMA Systems Communicating over Rayleigh Channels
Author :
Liu, Xiang ; Hanzo, Lajos
Author_Institution :
Sch. of Electron. & Comput. Sci., Southampton Univ.
Abstract :
The accurate average BER calculation of an asynchronous DS-CDMA system using random spreading sequences is studied in Rayleigh fading channels. An accurate closed-form expression is derived for the conditional characteristic function of the multiple access interference. An accurate BER expression is provided, which only requires a single numerical integration. Our numerical simulation results verify its accuracy, and also demonstrate the relative inaccuracy of the Gaussian approximation
Keywords :
Rayleigh channels; code division multiple access; error statistics; integration; quadrature phase shift keying; radiofrequency interference; spread spectrum communication; Gaussian approximation; QPSK modulated asynchronous DS-CDMA systems; Rayleigh channels; accurate BER analysis; average BER calculation; closed-form expression; multiple access interference; numerical integration; random spreading sequences; Binary phase shift keying; Bit error rate; Computer science; Fading; Gaussian approximation; Multiaccess communication; Multiple access interference; Performance analysis; Quadrature phase shift keying; Rayleigh channels;
Conference_Titel :
Vehicular Technology Conference, 2006. VTC 2006-Spring. IEEE 63rd
Conference_Location :
Melbourne, Vic.
Print_ISBN :
0-7803-9391-0
Electronic_ISBN :
1550-2252
DOI :
10.1109/VETECS.2006.1683124
