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In this paper, we analyze the bit error rate (BER) performance of synchronous optical code division multiple access (OCDMA) system using an optical zero-correlation zone (ZCZ) sequence set over diffuse link by computer simulation, and evaluate the influence of inter-symbol interference (ISI) on the system. The optical ZCZ sequence set is a set of pairs of binary and bi-phase sequences with zero-correlation...
In this paper, we manufacture the parallel transmission system consisting of an infrared light emitting diode (LED), an avalanche photo diode (APD) module and a field programmable gate array (FPGA) board corresponding to 132, 540 logic elements (LEs) by way of trial, and evaluate the BER performance of the optical ZCZ-CDMA system with the equal gain combining (EGC) by the indoor experiment. As a result...
In this paper, we analyze the bit error rate (BER) performance of optical code division multiple access (CDMA) system based on the optical zero-correlation zone (ZCZ) code using the optical correlator which is called optical ZCZ-CDMA system, over the optical fiber and space by theoretical formula. In the optical fiber transmission of this system, the effect of the avalanche photodiode (APD) noise,...
The optical ZCZ code, which is a set of pairs of binary and biphase sequences with zero correlation zone, can provide code division multiple access (CDMA) communication system without co-channel interference. The M-ary amplitude shift keying spread spectrum (M-ary/ASK-SS) system using this code can detect a desired sequence without interference of undesired sequences. We have proposed the compact...
The optical ZCZ code, which is a set of pairs of binary and bi-phase sequences with zero correlation zone, can provide optical code division multiple access (CDMA) communication system without co-channel interference. We proposed the compact construction of a code generator and a bank of matched filters for this code. In this paper, we verified that this system can suppress cochannel interference...
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