Title :
Performance analysis of atmospheric optical PPM CDMA systems
Author :
Ohtsuki, Tomoaki
Author_Institution :
Dept. of Electr. Eng., Tokyo Univ. of Sci., Noda, Japan
Abstract :
We propose atmospheric optical code-division multiple-access (CDMA) systems. We analyze the bit-error rate of the proposed system using pulse-position modulation (PPM) with considering the effects of the scintillation, avalanche photodiode noise, thermal noise, and multi-user interference. We show that the atmospheric optical CDMA systems can realize high-speed communications when the logarithm variance of the scintillation is small. When σs2 is large, we need to use forward-error correction codes.
Keywords :
avalanche photodiodes; code division multiple access; error statistics; forward error correction; optical links; pulse position modulation; scintillation; thermal noise; atmospheric optical code-division multiple-access systems; avalanche photodiode noise; bit-error rate; forward-error correction codes; free space optical links; high-speed communications; logarithm variance; multi-user interference; optical CDMA systems; pulse-position modulation; scintillation; thermal noise; Avalanche photodiodes; Bit error rate; High speed optical techniques; Interference; Multiaccess communication; Optical modulation; Optical noise; Optical pulses; Performance analysis; Pulse modulation;
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2003.808791
