Performance of Successive Interference Cancellation scheme using VW-OOC in OCDMA systems

To support multi-service and guarantee quality of service, variable-weight code is needed in OCDMA system. However, such codes suffer from high cross-correlation products which create high multiple access interference (MAI) that significantly reduces the capacity of the system. To mitigate MAI, in this paper, we study the Successive Interference Cancellation (SIC) receiver using VW-OOC efficiency in OCDMA. We develop the analytical expression of the error probability with variable-weight optical orthogonal code for SIC receiver. Simulation results show that by using SIC receiver we obtain good performance in VW-OCDMA (Variable-Weight OCDMA) system, and the highest priority user can be assigned to a codeword with the largest weights to guarantee the lowest bit error rate.