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In this paper, a code allocation method is used instead of the traditional “random” allocation method in order to provide the optimal performance for optical code-division multi-ple-access (O-CDMA) systems. The code allocation method mainly assigns the code matrix to each user by both utilizing the coding properties of multilevel prime codes (MPCs) and following the rule which guarantees these assigned code matrices having the minimum cross-correlation value (i.e., minimize the effect of mul-tiple-access interference (MAI) which caused by the simultaneous users in the system), thus the performance of the O-CDMA system using MPCs as the spreading codes can be improved and optimized. |
