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Abstract: A Han-Kobayashi based achievable scheme is presented for ergodic fadingtwo-user Gaussian interference channels IFCs with perfect channel stateinformation at all nodes and Gaussian codebooks with no time-sharing. Usingmax-min optimization techniques, it is shown that jointly coding across allstates performs at least as well as separable coding for the sub-classes ofuniformly weak every sub-channel is weak and hybrid mix of strong and weaksub-channels that do not achieve the interference-free sum-capacity IFCs. Forthe uniformly weak IFCs, sufficient conditions are obtained for which thesum-rate is maximized when interference is ignored at both receivers.



Author: Lalitha Sankar, Elza Erkip, H. Vincent Poor

Source: https://arxiv.org/







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