Performance enhancement of multi-code CDMA using interference cancellation

Multi-code CDMA is among the new features proposed for application in W-CDMA. The concept of multi-code CDMA is based on the idea of splitting a single sequence (at high symbol rate) that uses low processing gain into a number of sequences (at lower symbol rate) that require higher processing gain. However, using conventional matched filter detectors the gain from the increase in the processing gain is neutralised by the introduction of interference by the generated sequences. In this study we examine the application of interference cancellation in multi-code CDMA in order to reduce/eliminate the generated interference and thus improve the BER performance of the system.