Performance evaluation of a coded CDMA optical system

Author

Oellermann, Timothy ; Takawira, Fambirai

Author_Institution

Dept. of Electron. Eng., Natal Univ., Dalbridge, South Africa

Volume

3

fYear

1996

fDate

21-24 Oct 1996

Firstpage

908

Abstract

The performance of a coherent code division multiple access (CDMA) optical fiber communication system is degraded by the phase noise of the semiconductor lasers and by multiple access interference (MAI). This paper examines the effects of phase noise on the performance of a CDMA optical system. Results show that the combined effects of MAI and laser phase noise impose a very low limit on the number of simultaneous users. We investigate the possibility of increasing the receiver sensitivity using convolutional coding with Viterbi decoding, and show that coding significantly improves system performance, and allows for relaxation of the laser linewidth

Keywords

Viterbi decoding; code division multiple access; convolutional codes; electromagnetic interference; filtering theory; laser noise; matched filters; optical fibre communication; optical modulation; optical receivers; phase modulation; phase noise; semiconductor lasers; BPSK; MAI; Viterbi decoding; binary phase shift keying; coded CDMA optical system; coherent code division multiple access; convolutional coding; error probability; laser linewidth; laser phase noise; matched filter receiver; multiple access interference; optical fiber communication system; performance evaluation; receiver sensitivity; semiconductor lasers; system performance; Fiber lasers; Laser noise; Multiaccess communication; Multiple access interference; Optical fiber communication; Optical noise; Optical receivers; Optical sensors; Phase noise; Semiconductor lasers;

fLanguage

English

Publisher

ieee

Conference_Titel

Military Communications Conference, 1996. MILCOM '96, Conference Proceedings, IEEE

Conference_Location

McLean, VA

Print_ISBN

0-7803-3682-8

Type

conf

DOI

10.1109/MILCOM.1996.571414

Filename

571414