Ergodic Interference Alignment

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This paper has been submitted to IEEE International Symposium on Information Theory.

[edit] Abstract

Consider a K-user interference channel under a block fading model. At any particular time, each receiver will see a signal from most transmitters. The standard approach to such a scenario results in each transmitter-receiver pair achieving a rate proportional to 1/K the single user rate. However, given two well chosen time indices, the channel coefficients from interfering users can be made to exactly cancel. By adding up these two signals, the receiver can see an interference-free version of the desired transmission. Thus, each user can achieve an ergodic rate proportional to 1/2 the single user rate. In this paper, we apply this technique to a finite field interference channel to find the ergodic capacity region. Furthermore, we find a simple description for the achievable ergodic rate region in the Gaussian setting.

[edit] Citation

B. Nazer, M. Gastpar, S. Ali Jafar, and Sriram Vishwanath . "Ergodic Interference Alignment." (submitted)

[edit] BibTeX

@inproceedings{ {{{bitex cite}}},
  author = "B. Nazer and M. Gastpar and S. Ali Jafar and Sriram Vishwanath",
  title = { Ergodic Interference Alignment },
  booktitle = { {{{proceedings}}} }
}