Performance analysis of distributed turbo coded scheme with two ordered best relays
Hakan Kaya, Ertan Öztürk · IET Communications · 2015
In this study, the authors propose a distributed turbo coded (DTC) scheme utilising two best relays selected among multi‐relays. In this scheme, the considered turbo encoder is a rate 1/3 parallel concatenated code composed of two recursive systematic convolutional codes. The systematic information sequence is transmitted directly to a destination, whereas the two parity sequences, one of which is interleaved, are transmitted through the two selected best relays. The authors derive a union bound for the frame error rate including an upper bounded closed form expression for the pairwise error probability of the DTC scheme with two ordered best relays (DTC‐TBR) by utilising order of statistic, then the authors verify the analytical expression by simulations. Numerical results show that the proposed scheme outperforms the DTC scheme with a single best relay (DTC‐SBR) because of the more selection gain of the DTC‐TBR compared with those of DTC‐SBR with the rise of number of relays.