Title :
Multiple-access interference reduction for QS-CDMA systems with a novel class of polyphase sequences
Author :
Park, Seong Ill ; Park, So Ryoung ; Song, Iickho ; Suehiro, Naoki
Author_Institution :
Telecommun. R&D Center Inf. & Commun. Bus., Kyunggi, South Korea
fDate :
7/1/2000 12:00:00 AM
Abstract :
In this paper, a new class of polyphase sequences for CDMA systems and its generation method are suggested, and the correlation properties of the sequence are investigated. The performance of the sequence in quasi-synchronous CDMA (QS-CDMA) systems is investigated under a frequency-selective, time-nonselective, slow Nakagami fading channel with additive white Gaussian noise (AWGN). It is shown that the performance of the QS-CDMA systems using the suggested sequence is independent of the number of users and is much better than that using the PN sequence
Keywords :
AWGN channels; code division multiple access; correlation methods; fading channels; interference suppression; sequences; spread spectrum communication; synchronisation; AWGN; QS-CDMA systems; additive white Gaussian noise; correlation properties; frequency-selective time-nonselective slow Nakagami fading channel; generation method; multiple-access interference reduction; performance; polyphase sequences; quasi-synchronous CDMA; AWGN; Autocorrelation; Delay; Discrete Fourier transforms; Fading; Interchannel interference; Interference cancellation; Multiaccess communication; Multiple access interference; Transversal filters;
Journal_Title :
Information Theory, IEEE Transactions on
