Abstract
A hybrid pulse position modulation (PPM) code division multiple access (CDMA) optical communication system is proposed and its performance is analyzed using three different orthogonal coding schemes: optical orthogonal codes, prime codes and extended prime codes. The hybrid can usefully be exploited in optical wireless and optical fiber networks. Two types of PPM CDMA structures have been considered and analyzed. The implications of the structures and the coding schemes on the system bit rate and number of users are assessed. Original results are presented for the system error probability against the number of users using the three different orthogonal codes.
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