Application of FastICA Algorithm in Physical Layer Security Communication System based on Artificial Interference

In view of the security threat to the information transmission from the wireless communication system, this paper proposes a secure transmission scheme, which sends the artificial interference signal at the same time that the source node sends the secret information. In order to effectively extract the secret signal from the mixed signal by using the prior knowledge of the artificial interference signal, this paper proposes to apply the FastICA algorithm to the separation of the mixed signal and the extraction of the secret signal. Besides, a simple and easy artificial interference signal is designed for the QPSK modulation system to verify the effectiveness of the proposed scheme. The effectiveness of the proposed scheme is verified by MATLAB simulation of the bit error rate and the mean square error (MSE) of the separated QPSK signals.