A practical throughput comparison of MIMO-CDMA and MIMO-OFDM

This paper describes a realistic capacity comparison of MIMO-CDMA and MIMO-OFDM schemes, by taking account of several practical factors, such as actual modulation and channel coding, channel estimation error, spectrum loss due to band-pass filtering, and power loss due to pilot and control signal insertion. In the comparison, we employ the system parameters discussed in the 3^rd generation partnership project (3GPP). We also introduce a pilot and control cancellation scheme for practical consideration in MIMO-CDMA. Computer simulation results clarify that MIMO-OFDM achieves higher capacity in the high SNR region by about 1.2 bps/Hz, 2.5 bps/Hz, and 5.0 bps/Hz for average SNR values of 15 dB, 20 dB, and 30 dB, respectively. The effectiveness of the pilot and control cancellation scheme is also confirmed by a computer simulation.