Research on Security Transmission Technologies for Integrated Satellite and Terrestrial Networks

The integrated satellite and terrestrial network involves many technologies from the physical layer to the application layer. This paper studies safe transmission technology of the physical layer. Under the constraint of suburban users achieving secure transmission, a joint security transmission algorithm of ATC beamforming matrix and artificial noise covariance matrix, which is based on the known global channel state information is proposed to minimize the ATC transmit power. The security performance of the algorithm is verified by simulation.