On the Achievable Rate Regions for a Class of Cognitive Radio Channels: Interference Channel with Degraded Message Sets with Unidirectional Destination Cooperation

TL;DR

This paper introduces a new cognitive radio channel model with unidirectional destination cooperation, developing an achievable rate region that enhances capacity by combining Gel'fand-Pinkser coding with relay strategies, supported by numerical results.

Contribution

It proposes a novel channel model (IC-DMS-UDC) and derives an achievable rate region using combined coding and relaying techniques, advancing understanding of capacity in cooperative cognitive radio channels.

Findings

Achievable rate region developed for the new channel model.

Numerical evaluation shows capacity improvements in Gaussian case.

Combines Gel'fand-Pinkser coding with partial-decode-and-forward strategies.

Abstract

This paper considers the capacity gains due to unidirectional destination cooperation in cognitive radio channels. We propose a novel channel, interference channel with degraded message sets with unidirectional destination cooperation (IC-DMS-UDC), to allow the receiver of cognitive radio (secondary user) to participate in relaying the information for primary system (legitimate user). Our main result is the development of an achievable rate region which combines Gel'fand-Pinkser coding with partial-decode-and-forward strategy employed in the relay channel. A numerical evaluation of the region in the Gaussian case is also provided to demonstrate the improvements.