Feedback Increases the Degrees of Freedom of Two Unicast Gaussian Networks
In this paper we investigate the degrees of freedom of layered two unicast Gaussian networks with destination-to-source feedback. The feedback model allows the destinations to feedback their received signals to their respective sources perfectly. Based upon the non-feedback degrees-of-freedom result by Shomorony and Avestimehr , we show that in general, feedback enlarges the degrees of freedom region for two unicast layered Gaussian networks. This is the first case in literature where feedback can provide a degrees-of-freedom gain in multi-user interference networks.
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Record created on 2013-10-01, modified on 2016-08-09