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In this letter, we study relay-aided networks with presence of singleeavesdropper. We provide joint beamforming design of the source and relay thatcan minimize the overall power consumption while satisfying our predefinedquality-of-service (QoS) requirements. Additionally, we investigate the casethat the channel between relay and eavesdropper suffers from channeluncertainty. Finally, simulation results are provided to verify theeffectiveness of our algorithm.

QoS-Based Source and Relay Secure Optimization Design with Presence of Channel Uncertainty