Joint use of STTD and Antenna Diversity for OFDM / TDM
Abstract: Orthogonal frequency division multiplexing (OFDM) combined with time division multiplexing (TDM) can bridge the conventional OFDM and single carrier (SC) transmission by using minimum mean square error (MMSE) frequencydomain equalization (FDE). The channel frequency-selectivity can be exploited by MMSE-FDE to improve the bit error rate (BER) performance. A much better BER performance is achieved in comparison to conventional OFDM while reducing the peak-to-average power ratio (PAPR). Further performance improvement can be achieved by transmit/receive antenna diversity technique. In this paper, the joint use of space-time transmit diversity (STTD) and receive antenna diversity is discussed.