Feedback in the K-user interference channel

@article{Papailiopoulos2012FeedbackIT,
  title={Feedback in the K-user interference channel},
  author={Dimitris S. Papailiopoulos and Changho Suh and Alexandros G. Dimakis},
  journal={2012 IEEE International Symposium on Information Theory Proceedings},
  year={2012},
  pages={3130-3134}
}
We consider the scalar K-user Gaussian interference channel (IC) with feedback, where channel coefficients are fixed over time and frequency. We focus on two feedback models: (1) each receiver feeds back its received signal to all the transmitters and (2) functions of the received signals are fed back through a backward IC. We show that the feedback degrees-of-freedom (fdof) of the first model is k/2 if the global channel matrix is invertible. For the second feedback model, we show that fdof… CONTINUE READING

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