Performance Analysis of M-ary Optical CDMA in Presence of Chromatic Dispersion
نویسندگان
چکیده
The performance of M-ary optical code division multiple access (OCDMA) is analytically investigated in presence of chromatic dispersion. The study is carried out for single mode dispersion shifted and non dispersion shifted fibers. Walsh code is used as user address. The p-i-n photodetector is used for optoelectronic conversion process. In our proposed model 16 different symbols are modulated with different intensity levels and detected by direct detection technique. The numerical results show that, the reconstruction of the transmitted symbol is strongly dependent on the received symbols magnitude which is reduced by fiber length and symbol rate. It is found that the proposed OCDMA system shows better performance when dispersion shifted fiber is used as a communication medium.
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