the existing research is to optimize the single-user security rate in the complete channel state information.In fact
it’s impossible that there exists only one user in the system.The base station often receives incomplete channel state information.Aiming at this problem
a robust beamforming scheme was proposed.In the multi-user case
considering the influence of channel estimation error on the system security rate
the particle swarm optimization algorithm was used to optimize the emission beamforming vector
artificial noise covariance and power split ratio to ensure that the user collects a certain energy while maximizing the safe transmission rate.The simulation results show that the proposed scheme is slightly lower than the security rate in the ideal case
but it is meaningful to the actual system
taking into account the existence of eavesdropping users and the estimation error.
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references
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