Analog Network Coding in General SNR Regime: Performance of Network Simplification
A communication scenario where a source communicates with a destination over a directed layered relay network is considered. Each relay performs analog network coding where it scales and forwards the signals received at its input. In this scenario, the authors address the question: What portion of the maximum end-to-end achievable rate can be maintained if only a fraction of relay nodes available at each layer are used? They consider, in particular, the Gaussian diamond network and a class of symmetric layered networks.