Table 1 Alamouti-coded decoded-and-forward protocol with relay selection for cooperative communication
Timing | Tx | Rx |
|---|---|---|
Phase 1 (Direct) | S: Broadcast S1 to R and D | R: Receive S1 from S |
| Â | D: Receive S1 from S | |
Phase 2 (Alamouti) | S: Transmit S2 to D | D: Receive S1 from R, and S2 from S with Alamouti’s coding |
R: Retransmit S1 to D | D: Receive − S2* from S | |
Phase 3 (Direct) | S: Broadcast − S2* to R and D | R: Receive − S2* from S |
Phase 4 (Alamouti) | S: Transmit S1* to D | D: Receive − S2*from R, and S1* from S with Alamouti's coding |
|  | R: Retransmit − S2* to D |  |