Single-carrier frequency-domain equalization for multi-relay cooperative systems with relay selection
Homa Eghbali, Sami Muhaidat · 2011
In this paper, we investigate the performance of single-carrier frequency-domain equalization (SC-FDE) for distributed space-time block coded (DSTBC) systems with Non-Regenerative (or amplify-and-forward) relaying over frequency-selective Rician fading channels. Our performance analysis demonstrates that SC-FDE for DSTBC is able to achieve a maximum diversity order of Σi=1Rmin (L(SRi), L(RiD)) + R, where R is the number of relays, L(SRi) and L(RiD) are the channel memory lengths for source to ithrelay (S → Ri) link and ithrelay to destination (Rt→ D) link, respectively. Furthermore, to overcome the loss in bandwidth efficiency due to the deployment of orthogonal DSTBC, we present and investigate several relay selection strategies for D-SC-FDE over frequency selective channels.