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Robust beamforming and cooperative jamming for secure transmission in DF relay systems

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Figure

Fig. 1 System model of DF-based relay beamforming and CJ
Fig. 2 Average secrecy rate versus the maximum total transmit power constraint Pr at R under the error bound δ = 0.2
Fig. 3 Average secrecy rate versus the maximum total transmit power constraint Pr at R for different error bound δ
Fig. 5 Comparison between different transmit antennas at relay for fixed δ = 0.2, i.e., N = 4, N = 6 and N = 8, respectively

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