3 user interference channel: degrees of freedom as a function of channel diversity

Authors:
Guy Bresler;David N. C. Tse
Affiliations:
Wireless Foundations, UC Berkeley, Berkeley, California;Wireless Foundations, UC Berkeley, Berkeley, California
Venue:
Allerton'09 Proceedings of the 47th annual Allerton conference on Communication, control, and computing
Year:
2009

Citing 7
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Abstract

In this paper we characterize, in the context of vector space precoding strategies, the degrees of freedom of the parallel three-user interference channel as a function of the channel diversity L. A channel diversity of L is modeled by L independently fading real-valued parallel channels. Our results also apply to the case of parallel complex-valued channels, where the channel matrices Hij ∈ Cl×l are still diagonal but have complex entries. Here L = 2l is twice the number of parallel channels, and the resulting formulas (as a function of L) for the degrees of freedom are the same as in the real-valued case.