Cognitive Jammers Assisted Covert Communication in Cognitive Radio Networks  

作　　者：Liu Changjun Shi Jia Tie Zhuangzhuang Wang Yongchao 

机构地区：[1]The State Key Laboratory of Integrated Services Networks,Xidian University,Xi’an 710071,China

出　　处：《China Communications》2024年第9期75-89,共15页中国通信（英文版）

基　　金：supported in part by the National Natural Science Foundation of China(No.61941105,No.61901327 and No.62101450);in part by the National Natural Science Foundation for Distinguished Young Scholar(No.61825104);in part by the Fundamental Research Funds for the Central Universities(JB210109);in part by the Foundation of State Key Laboratory of Integrated Services Networks of Xidian University(ISN22-03)。

摘　　要：In this work,we investigate the covert communication in cognitive radio(CR)networks with the existence of multiple cognitive jammers(CJs).Specifically,the secondary transmitter(ST)helps the primary transmitter(PT)to relay information to primary receiver(PR),as a reward,the ST can use PT's spectrum to transmit private information against the eavesdropper(Eve)under the help of one selected cognitive jammer(CJ).Meanwhile,we propose three jammer-selection schemes,namely,link-oriented jammer selection(LJS),min-max jammer selection(MMJS)and random jammer selection(RJS).For each scheme,we analyze the average covert throughput(ACT)and covert outage probability(COP).Our simulation results show that CJ is helpful to ST's covert communication,the expected minimum detection error probability and ACT can be significantly improved with the increase of false alarm of CJ.Moreover,the LJS scheme achieves best performance in ACT and COP,followed by RJS scheme,and MMJS scheme shows the worst performance.

关 键 词：cognitive jammer cognitive radio covert communication performance analysis 

分 类 号：TN925[电子电信—通信与信息系统]