Symbol Error Rate Analysis and Power Allocation for Adaptive Relay Selection Schemes

Abstract

In this paper, we analyse the symbol error rate (SER) performance of adaptive relay selection schemes (ARS) in a general dual-hop multiple-relay network. Specifically, we provide a closed-form SER expression for ARS which is tight over the whole signal-to-noise ratio (SNR) region. In addition, the derived SER can be readily extended to conventional relay selection schemes, i.e. amplify-and-forward relay selection (AF-RS), perfect decode-andforward relay selection (PDF-RS), adaptive decode-and-forward relay selection (ADF-RS), and cooperative-maximum-ratio-combining decode-and-forward relay selection (CDF-RS). Transmit power allocation based on the simplified SER is presented to improve the system performance. The analytical results are verified by computer simulations.

Maximized Channel Capacity Based Power Allocation Technique for Multi Relay Hybrid Decode-Amplify-Forward Cooperative Network

“…Minimized SER based optimum power allocation with best relay selection for multi relay AF network is proposed in [6]. The authors introduced optimum power allocation schemes based on SER for adaptive relaying schemes in dual hop multi relay cooperative network in [7].…”

Selective combining for hybrid cooperative networks

“…Motivated by the above‐described disadvantages of the AF and DF protocols, various improved cooperative transmission protocols have been proposed, such as signal‐to‐noise ratio (SNR) threshold‐based selective digital relaying schemes [6, 10–12], cooperative maximum ratio combining (MRC)‐based DF [13, 14] and smart relaying scheme [15, 16], log‐likelihood‐ratio threshold‐based selective DF [17] and decode‐amplify‐forward [18, 19]. A hybrid forward (HF) protocol was proposed in [8, 9, 20–23], which provides superior performance than both the AF and the DF protocols and thus has received lots of attention recently. In [8, 9], the author studied the symbol error rate (SER) of the HF protocol by adaptively choosing the AF and the DF protocols on a per symbol basis, which is, however, hard to realise in practice.…”