Fixed point multistage DS-CDMA receivers

Through an analytical study of both parallel interference cancellation, dec orrelating and MMSE detections in a DS-CDMA (direct-sequence multiple-acces s) scheme, we derive simple improvements of the previous first structure to achieve better bit-error-rate performance. These schemes are compared with threshold-aided parallel interference cancellation via simulation results over various channels. The signals processing we used is quantified (baseba nd signals and fixed point calculations) and the synchronization is achieve d dynamically as a realistic structure would do.