Improvement of BER for one-stage Optical Parallel Interference Cancellation for the optical CDMA

Optical CDMA systems suffer from multiple access interferences (MAI) originating from other simultaneous users. As the number of simultaneous user increases, the bit error probability becomes higher. Several interference cancellation techniques have been proposed aiming at lowering MAI as Optical Parallel Interference Cancellation (OPIC), this system is complex, and the hardware is increased as the number of users increased which consume cost and processing time, so it is not practical for use in LAN. In This research we introduce One-Stage Optical Parallel Interference Cancellation (OS-OPIC) with one Optical Hard Limiter (OHL) and Double Optical Hard Limiter (DOHL), which based on OPIC; this system is simple, effective in cost, and suitable for LAN applications, it reduces MAI, gives better performance and lower BER than OS-OPIC. We use an Optical Orthogonal Code (OOC) as a signature code.