Trellis-coded asynchronous optical CDMA systems

Author

Liu, Maw-Yang ; Tsao, Hen-Wai

Author_Institution

Dept. of Electr. Eng., Nat. Taiwan Univ., Taipei, Taiwan

Volume

19

Issue

2

fYear

2001

fDate

2/1/2001 12:00:00 AM

Firstpage

180

Lastpage

185

Abstract

Since optical code division multiple access (CDMA) is an interference-limited system, we propose a system employing trellis-coded scheme and double optical hardlimiters (TC-DHLs) to alleviate the adverse impact of multiple access interference. For asynchronous transmission, optical orthogonal code (OOC) is utilized as signature sequence. System performance is evaluated under the chip synchronous case among different users, and thermal noise, avalanche photodiode (APD) noise, and interference are taken into consideration. Numerical results show that our proposed scheme can further reduce the error floor up to several orders over systems that using only double optical hardlimiters

Keywords

code division multiple access; digital communication; error statistics; interference (signal); optical fibre LAN; thermal noise; trellis coded modulation; APD noise; BER; MAI; asynchronous optical CDMA systems; asynchronous transmission; avalanche photodiode noise; bit error rate; chip synchronous case; double optical hardlimiters; error floor reduction; high speed LANs; interference-limited system; multiple access interference; optical code division multiple access; optical orthogonal code; signature sequence; system performance evaluation; thermal noise; trellis-coded scheme; Aggregates; Avalanche photodiodes; High speed optical techniques; Multiaccess communication; Multiple access interference; Optical fiber LAN; Optical noise; Optical transmitters; System performance; Upper bound;

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/50.917874

Filename

917874