2018/09/10 by Hamdi Joudeh, Bruno Clerckx, Joudeh, Hamdi +1
Engineering · Computer Science · #Advanced MIMO Systems Optimization #Wireless Communication Security Techniques #Cooperative Communication and Network Coding
paper · pdf · doi:10.48550/arxiv.1809.03309
In this paper, we explore the information-theoretic optimality of treating\ninterference as noise (TIN) in cellular networks. We focus on uplink scenarios\nmodeled by the Gaussian interfering multiple access channel (IMAC), comprising\nK mutually interfering multiple access channels (MACs), each formed by an\narbitrary number of transmitters communicating independent messages to one\nreceiver. We define TIN for this setting as a scheme in which each MAC (or\ncell) performs a power-controlled version of its capacity-achieving strategy,\nwith Gaussian codebooks and successive decoding, while treating interference\nfrom all other MACs (i.e. inter-cell interference) as noise. We characterize\nthe generalized degrees-of-freedom (GDoF) region achieved through the proposed\nTIN scheme, and then identify conditions under which this achievable region is\nconvex without the need for time-sharing. We then tighten these convexity\nconditions and identify a regime in which the proposed TIN scheme achieves the\nentire GDoF region of the IMAC and is within a constant gap of the entire\ncapacity region.\n