Title :
QS-CDMA systems using concatenated ZCZ codes
Author :
Lopes, Tarciana ; Rego, M. Geandre ; Filho, R. Baldini
Author_Institution :
UNICAMR, Campinas
fDate :
Oct. 29 2007-Nov. 1 2007
Abstract :
The authors propose a novel use of zero correlation zone (ZCZ) codes to increase the performance of quasi- synchronous code division multiple access (CDMA) systems. In this new approach, each spread sequence associated to a active user is a concatenation of two or more ZCZ sequences. In the receiver, each of the component sequences is separately correlated in order to recover the original information. A comparison to the convencional receiver is fulfilled by analyzing the performance of both schemes in a multipath Rayleigh fading channel and similar system parameters.
Keywords :
Rayleigh channels; code division multiple access; concatenated codes; multipath channels; spread spectrum communication; QS-CDMA systems; concatenated ZCZ codes; multipath Rayleigh fading channel; quasi-synchronous code division multiple access; receiver; spread sequence; zero correlation zone; Autocorrelation; Base stations; Concatenated codes; Degradation; Fading; Multiaccess communication; Multiple access interference; Performance analysis; Propagation delay; Signal analysis; interference-free window; spreading sequences; zero-correlation zone;
Conference_Titel :
Microwave and Optoelectronics Conference, 2007. IMOC 2007. SBMO/IEEE MTT-S International
Conference_Location :
Brazil
Print_ISBN :
978-1-4244-0661-6
Electronic_ISBN :
978-1-4244-0661-6
DOI :
10.1109/IMOC.2007.4404234
