APPARATUS AND METHOD FOR SECURE COMMUNICATION USING ARTIFICIAL NOISE SCHEME UNDER CORRELATED MAIN CHANNELS AND WIRETAP CHANNELS

摘要

The present invention relates to a secure communication device and method for improving a security transmission rate when there is a correlation between a main channel between a legitimate transmitter and a legitimate receiver and a wiretapping channel between a legitimate transmitter and an eavesdropper in a multi-antenna environment. Determining an optimal power allocation ratio for a system parameter including a channel correlation coefficient between the main channel and the wiretapping channel at a legitimate transmitter, and transmitting a confidential message based on the determined power allocation ratio and artificial noise Generating a signal and transmitting the generated transmission signal to the legal receiver.