Throughput Performance of Multicode DS-CDMA And MC-CDMA MIMO Multiplexing Using CDP-CE And Iterative Frequency-domain Interference Cancellation

Abstract In multiple-input multiple-output (MIMO) multiplexing, a superposition of data blocks transmitted from different transmit antennas using the same carrier frequency is received. In a frequency-selective channel, joint use of frequency-domain equalization (FDE) and signal detection of parallel transmitted signals is essential. Recently, we proposed an iterative frequency-domain interference cancellation (FDIC), which can reduce inter-antenna interference (IAI) and inter-chip interference (ICI) simultaneously, for multicode direct sequence code division multiple access (DS-CDMA) MIMO multiplexing. The iterative FDIC can also be applied to multicode multi-carrier CDMA (MC-CDMA) MIMO multiplexing. Highly accurate channel estimation is necessary in iterative FDIC. In this paper, we apply a cyclic delay pilot based channel estimation (CDP-CE) and compare by computer simulation the throughput performances of multicode DS-CDMA and MC-CDMA MIMO multiplexing with iterative FDIC. Keyword MIMO multiplexing,iterative FDIC,channel estimation,cyclic delay