Secure Transmission in Cognitive Radio Networks Using Full-Duplex Technique with Outdated CSI  

作　　者：Zhihui Shang Tao Zhang Guojie Hu Yueming Cai Weiwei Yang 

机构地区：[1]College of Medical Information Engineering,Zunyi Medical University,Guizhou 563006,China [2]College of Communication Engineering,Army Engineering University of PLA,Nanjing 210007,China [3]The Sixty-third Research Institute,National University of Defense Technology,Nanjing 210007,China [4]Department of Communication Engineering,Rocket Force University of Engineering,Xi’an 710025,China

出　　处：《China Communications》2023年第1期230-245,共16页中国通信（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.62201606 and No.62071486);the Project of Science and Technology Planning of Guizhou Province(No.[2020]-030);the Project of Science and Technology Fund of Guizhou Provincial Health Commission(gzwkj2022524);the Project of Youth Science and Technology Talent Growth Guizhou Provincial Department of Education(No.KY[2021]230);the Key Research Base Project of Humanities and Social Sciences of Education Department of Guizhou Province;the Project of Science and Technology Planning of Zunyi City(No.2022-381 and No.2022-384)。

摘　　要：This paper investigates the effects of the outdated channel state information(CSI)on the secrecy performance of an underlay spectrum sharing cognitive radio networks(CRNs),where the secondary user(SU)source node(Alice)aims to transmit the trusted messages to the full-duplex(FD)aided SU receiver(Bob)with the assistance of cooperative relay(Relay).Considering the impact of feedback delay,outdated CSI will aggravate the system performance.To tackle such challenge,the collaborative zero-forcing beamforming(ZFB)scheme of FD technique is further introduced to implement jamming so as to confuse the eavesdropping and improve the security performance of the system.Under such setup,the exact and asymptotic expressions of the secrecy outage probability(SOP)under the outdated CSI case are derived,respectively.The results reveal that i)the outdated CSI of the SU transmission channel will decrease the diversity gain from min(NANR,NRNB)to NRwith NA,NRand NBbeing the number of antennas of Alice,Relay and Bob,respectively,ii)the introduction of FD technique can improve coding gain and enhance system performance.

关 键 词：cognitive radio network physical layer security full-duplex multiple antennas relay secrecy outage probability outdated CSI 

分 类 号：TN918.4[电子电信—通信与信息系统]