Symmetric Feedback Capacity of the Gaussian Interference Channel to within One Bit

Jump to other IT Society Websites:

Symmetric Feedback Capacity of the Gaussian Interference Channel to within One Bit

Author(s):

Creation Date: Jun 28, 2009

Published In: Jun 2009

Paper Type: Conference Paper

Book Title: Proc. of IEEE International Symposium on Information Theory

Address: Seoul, South Korea

Abstract:

We characterize the symmetric capacity of the two-user Gaussian interference channel withfeedback to within 1 bit/s/Hz. The result makes use of a deterministic model to provide insights into the Gaussian channel. We derive a new outer bound to show that a proposed scheme can achieve the symmetric capacity to within one bit for all channel parameters. One consequence of the result is that feedback provides unbounded gain, i.e., the gain becomes arbitrarily large for certain channelparameters. It is a surprising result because feedback has been so far known to provide no gain in memoryless point-to-point channels and only power gain (bounded gain) in the multiple accesschannels. The gain comes from using feedback to fully exploit the side information provided by the broadcast nature of the wireless medium.

IEEE Explore link: http://dx.doi.org/10.1109/ISIT.2009.5205805

Award(s) Received:

COVID-19 Updates

Read important changes and updates to the 2020 activities of the IEEE Information Theory Society due to the COVID-19 pandemic at:

https://www.itsoc.org/covid

 

Table of Contents

IEEE TechNav