Comments on "Achievable Rates in Cognitive Radio Channels"

TL;DR

This paper corrects and completes the achievable rate region for the two-user cognitive interference channel originally proposed by Devroye et al., ensuring the accuracy of the information-theoretic analysis.

Contribution

It identifies and rectifies errors in the previous rate region derivation, providing a more accurate achievable rate region for the cognitive interference channel.

Findings

Corrected the rate terms in the original achievable region

Confirmed the corrected region includes the previous one

Enhanced understanding of cognitive radio channel capacities

Abstract

In a premier paper on the information-theoretic analysis of a two-user cognitive interference channel(CIC), Devroye et al. presented an achievable rate region for the two-user discrete memoryless CIC. The coding scheme proposed by Devroye et al. is correct but unfortunately some rate-terms in the derived achievable rate region are incorrect (in fact incomplete) because of occurring some mistakes in decoding and analysis of error probability. We correct and complete the wrong rate-terms and thereby show that the corrected achievable rate region includes the rate region presented in.