Performance of an optical PPM/CDMA system with turbo coding

Author

Kim, Jin Young ; Poor, H. Vincent

Author_Institution

Dept. of Electr. Eng., Princeton Univ., NJ, USA

Volume

2

fYear

1999

fDate

1999

Firstpage

958

Abstract

In this paper, performance of an optical CDMA system with turbo coding is analyzed and simulated. It is assumed that the optical channel is an intensity-modulated (IM) channel and a direct-detection scheme is employed to detect the received optical signal. The modulation scheme used is pulse-position-modulation (PPM). From the simulation results, it is shown that turbo coding offers considerable coding gain with reasonable encoding/decoding complexity. Also, it is demonstrated that the performance of an optical CDMA system can be substantially improved by increasing the interleaver length and the number of iterations for a fixed code rate. The results in this paper can be applied, for example, to an optical wireless LAN operating in an indoor environment with multiple access applications

Keywords

code division multiple access; intensity modulation; iterative decoding; optical communication; optical modulation; pulse position modulation; turbo codes; wireless LAN; coding gain; direct-detection scheme; encoding/decoding complexity; fixed code rate; indoor environment; intensity-modulated channel; interleaver length; iterations; multiple access applications; optical PPM/CDMA system; optical channel; optical signal detection; optical wireless LAN; pulse-position-modulation; simulation results; turbo coding; Analytical models; Iterative decoding; Multiaccess communication; Optical detectors; Optical modulation; Optical pulses; Performance analysis; Pulse modulation; Turbo codes; Wireless LAN;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference, 1999. VTC 1999 - Fall. IEEE VTS 50th

Conference_Location

Amsterdam

ISSN

1090-3038

Print_ISBN

0-7803-5435-4

Type

conf

DOI

10.1109/VETECF.1999.798472

Filename

798472