Hybrid ARQ Throughput Performance of Multicode DS-CDMA MIMO Multiplexing

One of the promising techniques to allow highspeed data transmission with a limited bandwidth is multiinput multi-output (MIMO) multiplexing. As a signal separation scheme, an iterative frequency-domain interference cancellation (FD-IC) using two-dimensional minimum mean square error (2D-MMSE) frequencydomain equalization (FDE) was recently proposed. There are two types of FD-IC: parallel FD-IC (FD-PIC) and successive FD-IC (FD-SIC). Hybrid ARQ of multicode DSCDMA MIMO multiplexing using FD-IC is considered in this paper. The achievable throughput performance is evaluated by computer simulation to show that FD-PIC is promising since FD-PIC is less computationally complex and has lower processing delay than FD-SIC.