Performance Analysis of AF Relaying With Selection Combining in Nakagami-$m$ Fading
Dong Liang Qin, Yuhao Wang, Fuhui Zhou, Kai‐Kit Wong · IEEE Systems Journal · 2019
This paper investigates the performance analysis of a selection combining scheme, which utilizes a variable gain amplify and forward relay over a Nakagami-$m$ fading channel. A selection combiner at a destination node chooses the better link between a relay channel and a direct channel. We derived exact closed-form expressions for moments of signal to noise ratio (SNR), ergodic capacity, and average symbol error probability. Simulation examples confirm that our exact formulas offer a more accurate analysis tool for selection combining than other prevailing approximations without extra complexity. The derived expressions serve as a useful tool for system design due to their validity for any SNR and arbitrary system parameters.