Title :
Performance of polyphase spreading sequences with optimized cross-correlation properties [CDMA systems]
Author :
Zepernick, Hans-Jürgen ; Dam, Hai Huyen ; Deepak, Virat
Author_Institution :
Western Australian Telecommun. Res. Inst., Nedlands, WA, Australia
Abstract :
The performance of a code division multiple access (CDMA) system depends on the correlation properties of the employed spreading sequences. In this paper, we investigate the performance of polyphase spreading sequences in an asynchronous direct sequence (DS) CDMA system. Especially, the equivalent odd and even correlation (EOE) sequences and the Oppermann sequences are examined. Their performance in terms of symbol error rate (SER) on additive white Gaussian noise (AWGN) channels and multiplicative Rayleigh fading channels are compared. Simulation results show that the Oppermann sequences with optimized cross-correlation characteristics outperform the EOE sequences on an AWGN channel and perform slightly better on a Rayleigh fading channel.
Keywords :
AWGN channels; Rayleigh channels; code division multiple access; correlation methods; error statistics; sequences; spread spectrum communication; AWGN; DS-CDMA; EOE sequences; Oppermann sequences; SER; additive white Gaussian noise channel; asynchronous direct sequence CDMA system; code division multiple access; cross-correlation property optimization; even correlation sequences; multiplicative Rayleigh fading channel; odd correlation sequences; polyphase spreading sequences; spreading sequence correlation properties; symbol error rate; AWGN channels; Additive white noise; Baseband; Binary sequences; Error analysis; Fading; Interference; Multiaccess communication; Phase shift keying; Quadrature phase shift keying;
Conference_Titel :
Vehicular Technology Conference, 2003. VTC 2003-Fall. 2003 IEEE 58th
Print_ISBN :
0-7803-7954-3
DOI :
10.1109/VETECF.2003.1285162
