In this paper, we consider iterative frequency-domain receivers for block transmission techniques with rate-1 Space Time Block Coding (STBC) for two or four transmit antennas. We consider both Orthogonal Frequency Division Multiplexing (OFDM) and Single-Carrier (SC) schemes. Since our STBC with 4 transmit antennas is not orthogonal, our receiver includes the cancellation of the residual interference, allowing performances close to the ones of an orthogonal code.
Our performance results show that combining STBC with block transmission schemes allows excellent performances, even for channels with small multipath diversity.