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作 者:Zhaoye Xu Aiyan Qu Kang An
机构地区:[1]College of Communications Engineering,Army Engineering University,Nanjing 210007,China [2]Jinling Institute of Technology,Nanjing 211169,China [3]Sixty-third Research Institute,National University of Defense Technology,Nanjing 210007,China
出 处:《China Communications》2021年第12期139-150,共12页中国通信(英文版)
摘 要:In this paper,the physical layer se-cure transmission in multi-antenna multi-user cogni-tive internet-of-thing(IoT)network is investigated,where the coalitional game based joint beamform-ing and power control scheme is proposed to im-prove the achievable security of cognitive IoT de-vices.Specifically,the secondary network consisting of a muti-antenna secondary transmitter,multiple sec-ondary users(SUs),is allowed to access the licensed spectrum resource of primary user(PU)with underlay approach in the presence of an unauthorized eaves-dropper.Based on the Merge-Split-Rule,coalitional game is formulated among distributed secondary users with cooperative receive beamforming.Then,an alter-native optimization method is used to obtain the op-timized beamforming and power allocation schemes by applying the up-downlink duality.The simulation results demonstrate the effectiveness of our proposed scheme in improving the SU’s secrecy rate and system utility while guaranteeing PU’s interference thresh-old.
关 键 词:physical layer secure transmission IOT coalitional game alternative optimization method
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