Construction and performance analysis of 2-D codes for M-ary OFFH-CDMA systems

Author

Lin, J.-Y. ; Jhou, J.-S. ; Lee, K.-T. ; Wen, J.-H.

Author_Institution

Comput. Sci. & Inf. Eng., Da-Yeh Univ., Taiwan

Volume

1

Issue

1

fYear

2007

fDate

2/1/2007 12:00:00 AM

Firstpage

113

Lastpage

121

Abstract

A new family of two-dimensional (2-D) codes constructed by combining frequency-hop and time-spreading codes is presented. The proposed codes are designed to overcome the limitation imposed on the maximum permissible number of simultaneous users in optical code-division multiple-access (OCDMA) systems. To increase the data transmission rate, the 2-D codes employ a M-ary signalling scheme. The proposed family of codes has the favourable characteristics of a zero autocorrelation constraint and a cross-correlation constraint of one. The performance of the 2-D code is analysed in terms of the bit error rate (BER) and is compared with that of a conventional OCDMA system using optical orthogonal code (OOC). The numerical and simulation results reveal that the proposed system outperforms conventional OCDMA systems both in terms of the BER and the data transmission rate. In addition, the system capacity is sufficient to ensure reliable communication (BERles10^-9) in local area networks

Keywords

code division multiple access; error statistics; frequency hop communication; optical fibre LAN; orthogonal codes; 2-D codes; BER; M-ary signalling scheme; OFFH-CDMA system; bit error rate; code division multiple access; local area network; optical fast frequency hop codes; performance analysis;

fLanguage

English

Journal_Title

Communications, IET

Publisher

iet

ISSN

1751-8628

Type

jour

DOI

10.1049/iet-com:20050686

Filename

4105988