期刊名称：International Journal of Computers and Communications
印刷版ISSN：2074-1294
出版年度：2013
卷号：7
期号：1
页码：18-25
出版社：University Press
摘要：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 with zerocorrelation zone 4n2 or 1 which is called the optical ZCZ-CDMA system, by the electrical and optical processing over the optical fiber and space by computer simulation and theoretical formula. In the optical fiber transmission of this system, the effect of the avalanche photodiode (APD) noise, thermal noise and co-channel interference are considered. Additionally, the effects of the scintillation and background noise are considered in the optical space transmission of this system. The optical ZCZ code, which is a set of pairs of binary and biphase sequences consisting of 1 or 1 with zero-correlation zone, may be able to provide optical CDMA communication system suppressed co-channel interference, and we have proposed the compact construction of a code generator and a bank of matched filters for this code. As a result, the BER performance of optical ZCZ-CDMA system over the optical space go down compared to that over the optical fiber, and the BER performance of this system by the electrical processing go down compared to that by the optical processing, and this system can’t remove completely co-channel interference.
