Approximate Feedback Capacity of the Gaussian Multicast Channel

While feedback plays a significant role in improving the reliability of communication systems, a traditional viewpoint on feedback capacity has been pessimistic over the past few decades. This is mainly due to Shannon's original result on feedback capacity which shows that feedback provides no increase in capacity for discrete memoryless point-to-point channels. For Multiple-Access Channels (MACs), feedback can increase the capacity; however, the increase in capacity for Gaussian MACs is bounded by 1 bit for all channel parameters.

Provided by: University of Calgary Topic: Networking Date Added: May 2012 Format: PDF

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