Polar Coding for the Cognitive Interference Channel with Confidential Messages

TL;DR

This paper introduces a low-complexity polar coding scheme that achieves the secrecy capacity region of the cognitive interference channel with confidential messages, simplifying code construction and minimizing randomness requirements.

Contribution

The paper presents a novel polar coding scheme that leverages cognitive features to achieve the entire secrecy capacity region with simple point-to-point codes.

Findings

Achieves the secrecy capacity region of CICC

Requires minimal randomness at the encoder

Simplifies code construction compared to existing methods

Abstract

In this paper, we propose a low-complexity, secrecy capacity achieving polar coding scheme for the cognitive interference channel with confidential messages (CICC) under the strong secrecy criterion. Existing polar coding schemes for interference channels rely on the use of polar codes for the multiple access channel, the code construction problem of which can be complicated. We show that the whole secrecy capacity region of the CICC can be achieved by simple point-to-point polar codes due to the cognitivity, and our proposed scheme requires the minimum rate of randomness at the encoder.