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

In this paper, 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 antennae. We show that simple linear receiver processing can achieve full antenna diversity gains, and investigate the performance versus complexity tradeoffs that emerge when one exploits also the embedded multipath diversity. Simulation results demonstrate that joint exploitation of multi-antenna and multipath diversities yields significantly enhanced performance in frequency selective multipath channels.