Title :
Spectral efficiency of OCDMA systems with coherent pulsed sources
Author :
Rochette, Martin ; Rusch, Leslie A.
Author_Institution :
Electr. & Comput. Eng. Dept., Univ. Laval, Ste. Foy, Que., Canada
fDate :
3/1/2005 12:00:00 AM
Abstract :
We present a model to evaluate the upper limit of the spectral efficiency of optical code-division multiple-access (OCDMA) systems with coherent sources. Phase-encoded and direct-sequence OCDMA systems are evaluated using this model. The results show that a spectral efficiency of 2.24×10-2 b/s· Hz can be achieved with a maximum bit error rate of 10-10 in these systems of the number of users. This result demonstrates that the maximum spectral efficiency of OCDMA systems with coherent sources is at least a factor of 5 higher than OCDMA systems with incoherent sources.
Keywords :
code division multiple access; code division multiplexing; error statistics; light coherence; optical communication equipment; phase coding; OCDMA systems; bit error rate; code division multiplexing; coherent sources; direct-sequence OCDMA; optical code-division multiple-access; phase-encoded systems; pulsed sources; spectral efficiency; Bandwidth; Bit error rate; Multiple access interference; Optical network units; Optical pulses; Optical sensors; Optical transmitters; Stimulated emission; Time division multiplexing; Wavelength division multiplexing; Code division multiplexing; communication system performance; encoding; optical noise; pulsed laser;
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2005.843524
