Abstract

Based on the orthogonality of space-time (ST) code, this paper concentrates on ST code transmission combined with intercarrier interference (ICI) parallel cancellation (PC) scheme to form STPC systems. With known channel state information (CSI) and orthogonal frequency division multiplexing (OFDM), we further develop this STPC-OFDM system with code rates 1 and 0.5 without increasing in power, bandwidth, and computational load for OFDM access (OFDMA) downlink from base station (BS) to mobile unit (MU) terminals. Simulation results show that this 4 × 1 STPC-OFDM system with code rate 1 provides outstanding bit error rate (BER) performance than that of the conventional 4 ×1 ST block coded OFDM systems with code rate 0.5 in COST 207 slow (typical urban) and fast (bad urban) frequency selective fading channels. Moreover, this STPC-OFDM can be employed as the fundamental building block for ST-MIMO-OFDM systems.

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