Title :
Turbo product codes for performance improvement of optical CDMA systems
Author :
Argon, Cenk ; McLaughlin, Steven W.
Author_Institution :
Sch. of Electr. & Comput. Eng., Georgia Inst. of Technol., Atlanta, GA, USA
Abstract :
The application of turbo product codes (TPC) in asynchronous (or synchronous) intensity modulated direct detection optical code division multiple access (CDMA) systems with on-off keying (OOK) is proposed in this study. Optical multiple access interference (OMAI) caused by other users, is the main source of noise that degrades system performance and limits the total number of active users in optical CDMA. The original turbo product decoding algorithm is modified according to the channel model of a direct detection optical CDMA system and it is shown that the implementation of turbo product codes in such a system provides significant improvement of the bit-error rate (BER) permitting a higher number of active users with less complex transmitters and receivers
Keywords :
amplitude shift keying; channel coding; code division multiple access; decoding; error statistics; intensity modulation; interference suppression; optical fibre networks; optical receivers; optical transmitters; turbo codes; BER; OMAI; OOK; asynchronous CDMA; bit-error rate; decoding; direct detection; intensity modulation; on-off keying; optical code division multiple access; optical multiple access interference; receivers; synchronous CDMA; system performance; transmitters; turbo product codes; Bit error rate; Intensity modulation; Modulation coding; Multiaccess communication; Optical detectors; Optical modulation; Optical noise; Optical receivers; Optical transmitters; Product codes;
Conference_Titel :
Global Telecommunications Conference, 2001. GLOBECOM '01. IEEE
Conference_Location :
San Antonio, TX
Print_ISBN :
0-7803-7206-9
DOI :
10.1109/GLOCOM.2001.965832
