Performance analysis of successive interference cancellation with modified quadratic congruence and Hadamard codes for optical CDMA

摘要

One of the techniques used to mitigate the problem of cross correlation is successive interference cancellation (SIC). This technique has been inspired of multi user detection technique (MUD), and can increase the capacity of optical CDMA system. A detailed analysis of this system is theoretically analyzed, taking into account multiple-access interference (MAI). In addition, the system performance is analyzed with both modified quadratic congruence (MQC) code and Hadamard codes. We have also compared the performance of this system (in terms of bit error rate) with conventional scheme. It has been shown that our proposed scheme performs better than the conventional scheme, and it has been found that signature code sets with higher weight are preferred in our SIC scheme.