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We quantitatively study the performance limits of two-dimensional (2-D) free-space optical code-division multiple-access (FSO/CDMA) systems over weak and strong atmospheric turbulence channels. The theoretical bounds for channel capacity are derived taking into account multiple-access interference (MAI), optical beating interference (OBI) and receiver noise. Forward error correction (FEC) codes are...
This paper proposes Turbo code for optical atmospheric 2-dimensional (2-D) CDMA systems using pulse-position modulation (PPM) signaling. The system performance is theoretically analyzed and the upper bound of bit-error rate (BER) is derived considering the impact of scintillation. The analysis also takes into account various types of interferences and noises such as multiple access interference (MAI),...
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