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Abstract: We explore the capacity and generalized degrees of freedom of the two-userGaussian X channel, i.e. a generalization of the 2 user interference channelwhere there is an independent message from each transmitter to each receiver.There are three main results in this paper. First, we characterize the sumcapacity of the deterministic X channel model under a symmetric setting.Second, we characterize the generalized degrees of freedom of the Gaussian Xchannel under a similar symmetric model. Third, we extend the noisyinterference capacity characterization previously obtained for the interferencechannel to the X channel. Specifically, we show that the X channel associatedwith noisy very weak interference channel has the same sum capacity as thenoisy interference channel.



Autor: Chiachi Huang, Viveck R. Cadambe, Syed A. Jafar

Fuente: https://arxiv.org/



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