Abstract
Self-adaptive physical layer security technology is a major challenge for achieving anti-quantum endogenous security in 6G communication.We consider the maximum average decodable rate for a non-degraded Gaussian MIMO wiretap channel, whose the main channel suffers fading.We adopt the layered broadcast approach based on superposition coding todesign and optimize the achievable and secrecy scheme,when the eigenvalues of the noise covariance in each channel state can be ordered by the weak supermajorization.With the scheme, the maximum average decodable rate can be characterized as a non-convex optimization problem of a log function.We propose an algorithm which can output the optimal solution for the optimization and thus help to obtain the optimal scheme in the scalar case and most MIMO cases.
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