SER of Multiple Amplify-and-Forward Relays With Selection Diversity
In wireless mesh networks, it is desirable to utilize overlapping coverage of multiple parallel relays to assist the source-destination transmission. In this paper, the authors consider Selection Diversity (SD) to select the strongest link amongst the direct and N Amplify-and-Forward (AF) relay links. They derive new closed-form expressions for the Symbol Error Rate (SER) in independent but not necessarily identically distributed (i.n.d.) Rayleigh fading relay channels. Their results are given as both lower bound and asymptotic expressions based on an accurate upper bound on the Signal-to-Noise Ratio (SNR) of the relay links.