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

Volume

46

Issue

4

fYear

2000

fDate

7/1/2000 12:00:00 AM

Firstpage

1448

Lastpage

1458

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;

fLanguage

English

Journal_Title

Information Theory, IEEE Transactions on

Publisher

ieee

ISSN

0018-9448

Type

jour

DOI

10.1109/18.850681

Filename

850681