Performance evaluation of 2D wavelength/time optical CDMA system with optical hard-limiters by numerical modeling

Author

Chovan, Jozef ; Uherek, Frantisek

Author_Institution

Dept. of Microelectron., Slovak Univ. of Technol., Bratislava, Slovakia

Volume

1

fYear

2004

fDate

4-8 July 2004

Firstpage

225

Abstract

We present the modification of a decoder for 2D wavelength/time (W/T) optical code division multiple access (O-CDMA) system by optical hard-limiters. The performance improvement of the system using the proposed decoder modification is shown by numerical simulation of the bit error probability as a function of active user number and weight of codeword for different decoder topologies. The influence of the non-ideal properties of the optical hard-limiters used on the bit error probability in the system is studied. The performance evaluation shows that the dependence of bit error probability versus the codeword weight has a local minimum, which allows an optimum codeword weight to be chosen for achieving the minimum bit error probability in a 2D W/T O-CDMA system for given system parameters.

Keywords

code division multiple access; decoding; error statistics; optical communication equipment; optical fibre networks; optical information processing; optical limiters; 2D wavelength/time O-CDMA system; 2D wavelength/time optical CDMA system; active user number; all-optical signal processing; bit error probability; decoder modification; decoder topology; fiber optic networks; optical hard-limiters; optimum codeword weight; Decoding; Error probability; Fiber nonlinear optics; Multiaccess communication; Nonlinear optics; Numerical models; Optical noise; Optical receivers; Optical signal processing; Topology;

fLanguage

English

Publisher

ieee

Conference_Titel

Transparent Optical Networks, 2004. Proceedings of 2004 6th International Conference on

Print_ISBN

0-7803-8343-5

Type

conf

DOI

10.1109/ICTON.2004.1360280

Filename

1360280