On the Performance of DF Relay Selection with Optimum Combining and Co-Channel Interference
Henry W. Merino, Carlos Eduardo Câmara, Celso de Almeida · 2016
In this paper, the performance of decode-and-forward (DF) cooperative network in presence of co-channel interference (CCI) at destination is presented. In particular, a scenario with multiple relays and multiple antennas at destination is analysed by considering the best relay selection jointly with optimum combining (OC). The moment-generating function (MGF) of the signal-to-interference-plus-noise ratio (SINR) at destination is derived in order to evaluate the average bit-error rate (BER). The analytical results are validated using Monte-Carlo simulations for several situations, showing that the proposed scenario totally mitigates the CCI and obtains a diversity gain of N(K+1) - 1, where N is the number of antennas at destination and K is the number of cooperative relays.