Code performance in multi-rate CDMA for an optical fiber network

We have developed analytical expressions for the cross-correlation between users at unequal bit rates (chip rates are equal), i.e. for multi-rate (multi-processing gain) CDMA high bandwidth LAN. These expressions for the cross-correlations were used to generate data for Gold and Kasami sequences. The results of our calculations show that Gold and Kasami sequences' cross-correlation performance in a multi-rate scheme is very close to the performance calculated when assuming random sequences.