Space-time coded transmissions with maximum diversity gains over frequency-selective multipath fading channels

We study space-time block coding for single carrier block transmissions through frequency selective multipath channels of order L. We prove that maximum diversity of order 2(L + 1) can be achieved with two transmit and one receive antennas. We show that simple linear receiver processing can achieve full antenna diversity gains, and investigate the performance versus complexity tradeoffs that emerge when the embedded multipath diversity is also exploited. Simulation results demonstrate that joint exploitation of multi-antenna and multipath diversities yields significantly enhanced performance in frequency selective multipath channels