MAI cancellation by optimum single-user detection for DS/CDMA systems using random binary codes

The optimum single-user detector (OSD) for a DS/CDMA based communications system is investigated using random binary signature codes of length 32 and 64 chips. The BER performances are obtained by Monte-Carlo simulation for spectral efficiencies of 50% and 100%. Results show that the OSD performs significantly better than the matched filter detector (MFD) with a modest increase in complexity. It is also seen that noise enhancement is induced due to MAI cancellation which degrades the OSD performance.