Sum-rate based opportunistic relay selection with channel estimation error for a dual-hop multiple half/full-duplex bi-directional wireless relaying networks

Abstract

This paper investigates the channel estimation error effects on the opportunistic relay selection strategy. The opportunistic relay selection strategy is based on selecting the maximum sum-rate of half/full-duplex relay terminal among N. The investigation considers a dual-hop multiple half/full-duplex bi-directional wireless relaying networks in the system model. According to Monte-Carlo simulation results, sum-rate based relay selection strategy achieves cooperative diversity in high signal-to-noise regimes both for half/full-duplex cases. However, for the full-duplex based case, if the loop interference variances are relatively high, the achievable cooperative diversity turns out to be 0 from N while also causes system coding gain losses. The CEE causes system coding gain losses in low signal-to-noise ratio regimes. However, in high signal-to-noise ratio regimes, the CEE effects turn out to be at negligible levels.