Source Power Allocation and Relaying Design for Two-Hop Interference Networks with Relay Conferencing

摘要: In this paper, we consider a two-hop interference network, which consists of two source-destination pairs and relay nodes connected with signal-to-noise ratio (SNR) limited out-of-band conferencing links. Assuming that the amplify-and-forward (AF) relaying scheme is adopted, network shown to be equivalent two-user channel (IC). By deploying IC decoding schemes, i.e., single-user joint decoding, respectively, characterize achievable rate regions two-stage iterative optimization method: First, fix source power pair maximize sum over combining vector; second, vector optimize pair. Specifically, for design new routine compute optimal solution first subproblem, more efficient than existing scheme; second develop an algorithm, closed-form each iteration. Furthermore, it revealed AF achieves full degree-of-freedom (DoF), outperforms case without conferencing. Finally, simulation results show can significantly improve system performance under certain conditions.