High rate single-carrier frequency-domain equalization for multi-relay cooperative systems
Homa Eghbali, Sami Muhaidat · 2011
To overcome the loss in bandwidth and throughput efficiency due to the deployment of orthogonal distributed space-time block codes (DSTBC), in this paper, we investigate the performance of quasi-orthogonal multi space-time transmit diversity (MSTTD) and single-carrier frequency-domain equalization (SC-FDE) for DSTBC systems with Non-Regenerative relaying over frequency-selective fading channels. Assuming NRrelays and NSsource nodes, the system's overall rate is NS/(NR+1), which is higher than the rates achieved by system's counterparts with orthogonal codes. We further present and investigate several relay selection strategies for MSTTD SC-FDE over frequency selective channels. The effectiveness of different relay selection schemes is verified by numerical simulations.