Outage probability of selection relaying networks with distributed switch and stay combining over Rayleigh fading channels

We propose and analyze a distributed switch and stay combining network with selection relaying with an aim to reduce the complexity at the destination as well as to make efficient use of the degrees of freedom of the channels by exploiting a limited feedback signal from the destination. In particular, whenever the currently connected link (either from the source or from the best relay) to the destination is not favorable to decoding, the destination will switch to the alternative link as per the rule of switch and stay combining. The performance of the proposed system is derived in terms of outage probability and achievable spectral efficiency. The analytic results show that the proposed system assisted by the selection relaying exhibits a higher spectral efficiency than incremental relaying with selection relaying at low SNR regime. Monte-Carlo simulations are performed to verify the analysis.