Title :
On generalized orthogonal spreading sequences for quasi synchronous CDMA system
Author :
Zeng, Fanxin ; Ge, Lijia
Author_Institution :
Graduate Sch., Chongqing Commun. Inst., China
Abstract :
Based on equidistant code, a method for obtaining spreading sequences with zero correlation zone (ZCZ) or low correlation zone (LCZ) is proposed, these spreading sequences can be employed in approximately synchronized code division multiple access (AS-CDMA) system to eliminating multiple access and multipath interference. In addition, lower bounds on correlation function of such sequence set are unproved, a new lower bound, for those ZCZ sequences which don´t meet lower bound, is presented.
Keywords :
binary sequences; code division multiple access; correlation methods; radiofrequency interference; approximately synchronized code division multiple access; equidistant code; generalized orthogonal spreading sequences; low correlation zone; multipath interference; quasi synchronous CDMA system; zero correlation zone; Autocorrelation; Binary codes; Binary sequences; Code division multiplexing; Digital communication; Digital signal processing; Hamming distance; Interference elimination; Multiaccess communication; Roentgenium;
Conference_Titel :
Information, Communications and Signal Processing, 2003 and Fourth Pacific Rim Conference on Multimedia. Proceedings of the 2003 Joint Conference of the Fourth International Conference on
Print_ISBN :
0-7803-8185-8
DOI :
10.1109/ICICS.2003.1292533
