研究目的
To maximize the worst-case secrecy rate in a one-way multi-antenna relay network with imperfect global channel state information (CSI) in the presence of multiple eavesdroppers.
研究成果
The proposed robust beamforming and power allocation design effectively maximizes the secrecy rate in DF relay networks with imperfect CSI. The iterative algorithm based on SCA and SDR techniques shows fast convergence and improved performance over non-robust schemes. The study highlights the importance of power allocation and the impact of CSI mismatch on secrecy rates.
研究不足
The study assumes that the eavesdroppers can only overhear the information from the relay to the destination in the second hop and does not consider direct links between the source and the eavesdroppers. The CSI errors are modeled as bounded by ellipsoids or following Gaussian distribution, which may not cover all practical scenarios.
1：Experimental Design and Method Selection:
The study involves designing robust beamforming and power allocation schemes for a DF relay network with imperfect CSI. The methodology includes semidefinite relaxation, successive convex approximation, and S-procedure techniques to handle the non-convex problem.
2：Sample Selection and Data Sources:
The simulations assume Rayleigh flat fading channels for all generated channels, with CSI errors bounded by spheres in the ellipsoid-bounded model.
3：List of Experimental Equipment and Materials:
The study uses numerical solvers like SeDuMi for solving optimization problems in Monte-Carlo experiments.
4：Experimental Procedures and Operational Workflow:
The proposed iterative algorithm is applied to solve the optimization problem, with simulations validating the algorithm's effectiveness.
5：Data Analysis Methods:
The performance is evaluated in terms of secrecy rate versus transmit power and mismatch parameters, comparing robust and non-robust schemes.
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