A synchronous fiber-optic CDMA system using adaptive optical hardlimiter

Author

Lin, Che-Li ; Wu, Jingshown

Author_Institution

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

Volume

16

Issue

8

fYear

1998

fDate

8/1/1998 12:00:00 AM

Firstpage

1393

Lastpage

1403

Abstract

In this paper, we propose a new synchronous fiber-optic code-division multiple-access (CDMA) system using adaptive optical hardlimiter and modified prime sequence code. At the receiver, the energy in one bit duration is estimated and used to adjust the threshold value of the adaptive optical hardlimiter which is placed after the optical correlator. The bit error probability of the system is analyzed with the consideration of thermal noise, shot noise, and dark current noise of the photodetector. The results show that this system can support a larger number of simultaneous users than other systems also using modified prime sequence code under the same bit error probability constraint

Keywords

code division multiple access; codes; dark conductivity; optical correlation; optical fibre networks; optical noise; probability; shot noise; thermal noise; adaptive optical hardlimiter; bit duration; bit error probability; dark current noise; modified prime sequence code; optical correlator; photodetector; receiver; same bit error probability constraint; shot noise; synchronous fiber-optic CDMA system; synchronous fiber-optic code-division multiple-access system; thermal noise; threshold value; Adaptive optics; Adaptive systems; Fiber nonlinear optics; High speed optical techniques; Multiaccess communication; Nonlinear optics; Optical attenuators; Optical noise; Optical receivers; Optical sensors;

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/50.704605

Filename

704605