首页|Securing STAR-FC-RIS empowered integrated sensing and multiuser communications against target eavesdropping
Securing STAR-FC-RIS empowered integrated sensing and multiuser communications against target eavesdropping
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This paper investigates a simultaneous-transmitting-and-reflecting fully-connected reconfig-urable intelligent surface(STAR-FC-RIS)empowered integrated sensing and multiuser communications(ISAMC)network,where a dual-functional radar-communication base station detects a malicious radar tar-get nearby and communicates with multiple legitimate users on the other side of the STAR-RIS.We utilize an integrated architecture that combines the fully-connected(FC)-RIS,an emerging type of beyond-diagonal(BD)-RIS,with the time-switching(TS)-STAR-RIS to enhance both the sensing and communications at the cost of possible target intercepting and propose the simultaneous-transmitting-and-reflecting fully-connected RIS(STAR-FCR)schemes to strike a balance between sensing and communications performance.There-after,observing the security-reliability performance tradeoff of the downlink ISAMC,we conduct closed-form analyses to compare COPs of round-robin scheduling(RS)and multiuser scheduling(MS)with the aid of a TS-based STAR-FC-RIS.Furthermore,we derive closed-form expressions of the sensing outage probabil-ity,communications outage probability(COP),and communications intercept probability,where an average of the three probabilities is exploited to obtain an optimized time allocation(OTA)of the STAR-FC-RIS.Numerical results verify that the STAR-FCR-MS scheme outperforms the STAR-FCR-RS scheme in terms of sensing reliability and communications security.Moreover,an OTA remarkably enhances the overall performance of the STAR-FCR schemes of ISAMC systems.
simultaneous-transmitting-and-reflecting reconfigurable intelligent surface(RIS)fully-connected beyond-diagonal RISintegrated sensing and communicationsmultiuser schedulingsecurity
Shuying LIN、Yulong ZOU、Fu XIAO、Bin LI
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School of Telecommunications and Information Engineering,Nanjing University of Posts and Telecommunications,Nanjing 210003,China
School of Computer Science,Nanjing University of Posts and Telecommunications,Nanjing 210023,China
Key Laboratory of Broadband Wireless Communication and Sensor Network Technology,Nanjing University of Posts and Telecommunications,Nanjing 210003,China
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