PERFORMANCES OF PARALLEL INTERFERENCE CANCELLATION (PIC) RECEIVERS IN HIGH-SPEED ACCESS OPTICAL-CDMA NETWORKS

摘要

This paper provides a new approach for computing the theoretical performances of the Parallel Interference Cancellation (PIC) technique in Direct Sequence-Code Division Multiple Access (DS-CDMA) system, for Optical Orthogonal Codes (OOCs) with small cross-correlation constraints. OOCs impose a large code length value in order to maintain a large number of users. These results induce a limitation on the maximum data bit rate for a realistic implementation of such receiver in high-speed local optical networks. We have considered OOCs with a greater cross-correlation constraint in order to relax the code size. The performance of PIC receiver and various scheme (cascaded cancellation stages with and without hard-limiter) have been numerically obtained.