Performance analysis of parallel interference cancellation detector in downlink MC-CDMA systems
Zhanyun Duan, T.H. Stitz, Mikko Valkama, Markku Renfors · Nordic Signal Processing Symposium · 2004
This paper proposes two types of low-complexity iterative multiuser detectors for downlink MC-CDMA systems, based on parallel interference cancellation (PIC). It will be shown that per-carrier MMSE-PIC detector is equivalent to per-user MMSE-PIC detector in the fully loaded case, and per-carrier MMSE-PIC obtains the same BER performance as per-user MMSE-PIC with one tenth of computational complexity for lower loaded cases. In addition, EGC based PIC detector is 1 dB worse than per-user MMSE-PIC, however the complexity is about one half of per-user MMSE-PIC detector’s complexity for the fully loaded case and about one twentieth for lower loaded cases.