Title :
On the Spreading Sequences with Perfect Periodic Crosscorrelation Properties
Author :
Feng, Lifang ; Fan, Pingzhi ; Hao, Li
Abstract :
To eliminate the multiple access interference of asynchronous direct sequence code division multiple access (DS-CDMA) system, a set of sequences with perfect crosscorrelation functions (CCFs) is desirable, although the corresponding autocorrelation function (ACF) cannot be simultaneously perfect based on the theoretical bounds. In this letter, a general construction of the spreading sequences with perfect periodic CCFs is presented, and the corresponding theoretical limit on the family size, the number of phases, and the sequence length is also investigated.
Keywords :
code division multiple access; correlation methods; radiofrequency interference; spread spectrum communication; DS-CDMA; asynchronous direct sequence code division multiple access; autocorrelation function; crosscorrelation functions; multiple access interference; perfect periodic crosscorrelation properties; spreading sequences; Autocorrelation; Bandwidth; Delay systems; Direct-sequence code-division multiple access; Mobile communication; Multiaccess communication; Multiple access interference; Signal design; Transmitters; Spreading sequences; asynchronous DS-CDMA systems; multiple access interference; perfect periodic crosscorrelation function;
Conference_Titel :
Signal Design and Its Applications in Communications, 2007. IWSDA 2007. 3rd International Workshop on
Conference_Location :
Chengdu
Print_ISBN :
978-1-4244-1074-3
Electronic_ISBN :
978-1-4244-1074-3
DOI :
10.1109/IWSDA.2007.4408407
