A feedback-based secrecy coding scheme using polar code over wiretap channels

Polar codes can be used to achieve secrecy capacity of degraded wiretap channels. In this paper, we propose a feedback-based secrecy coding scheme using polar code over non-degraded wiretap channels. With the feedback architecture, the proposed secrecy coding scheme can significantly obtain a positive secrecy rate. Moreover, polar codes have low complexity of encoding and decoding, which is good for implementing. Simulation results show that the proposed feedback-based secrecy coding scheme using polar code can transmit confidential messages reliably and securely. Moreover, the impact of the conditions of the forward channels and feedback channels on the performance of the proposed secrecy coding scheme are analyzed.