A new polyphase sequence with perfect even and good odd cross-correlation functions for DS/CDMA systems

Author

Park, So Ryoung ; Song, Iickho ; Yoon, Seokho ; Lee, Jooshik

Author_Institution

Dept. of Electr. Eng. & Comput. Sci., Korea Adv. Inst. of Sci. & Technol., Daejeon, South Korea

Volume

51

Issue

5

fYear

2002

fDate

9/1/2002 12:00:00 AM

Firstpage

855

Lastpage

866

Abstract

A class of polyphase signature sequences for direct-sequence code-division multiple-access (DS/CDMA) systems is proposed. The proposed class has zero periodic (=even) cross-correlation (CC) function and approximate maximum magnitude N/π of odd cross-correlation (OCC), where N is the length of sequences. Although the maximum magnitude is relatively large, it is observed that the maximum magnitude has little effect on the performance of the DS/CDMA system, since its frequency is very low. The performance of the proposed sequence in DS/CDMA systems is investigated and shown to be better than that of other sequences for an asynchronous additive white Gaussian noise channel environment with and without Rayleigh multipath fading.

Keywords

AWGN channels; Rayleigh channels; code division multiple access; multipath channels; sequences; spread spectrum communication; DS-CDMA; Rayleigh fading; additive white Gaussian noise channel; asynchronous channel; direct-sequence code-division multiple-access; even cross-correlation function; multipath fading; odd cross-correlation function; polyphase sequence; signature sequences; Additive white noise; Channel capacity; Degradation; Design methodology; Direct-sequence code-division multiple access; Frequency; Multiaccess communication; Multiple access interference; Performance analysis; Rayleigh channels;

fLanguage

English

Journal_Title

Vehicular Technology, IEEE Transactions on

Publisher

ieee

ISSN

0018-9545

Type

jour

DOI

10.1109/TVT.2002.800636

Filename

1105926