Title :
Performance of an optical CDMA system with turbo code
Author_Institution :
Dept. of Electr. Eng., Princeton Univ., NJ, USA
Abstract :
In this paper, performance of an optical CDMA system with turbo code is analyzed and simulated. It is assumed that optical channel is an intensity modulated (IM) channel and direct-detection scheme is employed to detect the received optical signal. The modulation scheme used is binary-pulse-position-modulation (BPPM). 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 for a fixed code rate. The results in this paper can be applied to an optical CDMA system with PPM modulation
Keywords :
code division multiple access; decoding; intensity modulation; optical fibre networks; optical modulation; optical signal detection; pulse position modulation; turbo codes; PPM modulation; binary-pulse-position-modulation; coding gain; decoding; direct-detection scheme; encoding; fixed code rate; intensity modulated channel; interleaver length; modulation scheme; optical CDMA system; optical channel; performance; received optical signal detection; simulation; turbo code; Convolutional codes; Iterative decoding; Maximum likelihood decoding; Multiaccess communication; Optical modulation; Optical pulses; Optical receivers; Optical transmitters; Pulse modulation; Turbo codes;
Conference_Titel :
Radio and Wireless Conference, 1999. RAWCON 99. 1999 IEEE
Conference_Location :
Denver, CO
Print_ISBN :
0-7803-5454-0
DOI :
10.1109/RAWCON.1999.810938
