Secure Beamforming Algorithm for Satellite and Aerial Cooperative Network with Imperfect CSI
A secure beamforming(BF)algorithm with imperfect channel state information(CSI)is proposed for a satellite and sky cooperative network with the help of UAV relay.Firstly,a multi-objective optimization problem(MOOP)is formulated to maximize the achievable secrecy rate and to minimize the transmit power.Then,considering that it is difficult to obtain the perfect CSI of eavesdroppers and out-network users,a method combing weighted sum method,the solution method of angular discretization and successive convex approximation are proposed to convert the non-convex multi-objective problems into a convex one,and the semidefinite programming is adopted to solve the problem.The simulations confirm that a better compromise can be achieved between security and power consumption by the proposed algorithm.
satellite and aerial cooperative networkmulti-objective optimizationrobust beamformingphysical layer security
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