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Achievable Rates for a LAN-Limited Distributed Receiver in Gaussian Interference

Christian D. Chapman (Christian.Chapman***at***asu.edu)
Hans Mittelmann (mittelmann***at***asu.edu)
Adam R. Margetts (margetts***at***ieee.org)
Daniel W. Bliss (d.w.bliss***at***asu.edu)

Abstract: A base node seeks to receive a broadcast with its own observation in addition to side-information provided via a local area network (LAN) from several ‘helper nodes,’potentially occluded by an external interferer. Ideally, helpers would convey their precise observations to the base but the LAN has limited capacity, so helpers must compress and forward. Bounds are found on the capacity of such a system with channel state information available at the helpers and in interference environments where the receivers experience correlated noise. The bounds are tight when the LAN allows for either a great or small amount of communications from helpers to base. The bounds also demonstrate that such systems are robust in mitigating low-rank interferers. Trials of the bounds reveal that while the achievable rates are stable in varying the ratio of scattered-path to line-of-sight signal power seen at the helpers, strategies for achieving these rates must change.

Keywords: communications rate, distributed receivers, Gaussian interference

Category 1: Applications -- Science and Engineering


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Entry Submitted: 11/07/2016
Entry Accepted: 11/07/2016
Entry Last Modified: 04/11/2018

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