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.
- Atmospheric optical communications
- Optical code-division multiple-access (CDMA)
- Pulse-position modulation (PPM)
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics