CAJ | 학술논문

该文在同频全双工技术快速发展的背景下，针对物理层安全研究中波束成形技术的高复杂度和发端天线选择(TAS)技术的低性能，提出一种联合发端天线选择和收端人工噪声(AN)的物理层安全传输方法TAS-rAN。首先，有多根天线的发端，利用天线选择技术，选取能使合法接收方接收信噪比最大的天线发送保密消息；其次，有同频全双工能力的收端，在接收到消息的同时，发送人工噪声来扰乱窃听方对保密消息的窃听。在 Nakagami-m 信道下，推导了安全中断概率的闭合表达式，并基于此，得到非零安全容量的概率表达式；通过渐进安全中断概率的推导，得到TAS-rAN方法的安全分集度。仿真结果表明，与已有的TAS-single和TAS-Alamouti方法相比，TAS-rAN安全方法具有较强的稳定性，且能提供更优的安全性能。
해문재동빈전쌍공기술쾌속발전적배경하，침대물리층안전연구중파속성형기술적고복잡도화발단천선선택(TAS)기술적저성능，제출일충연합발단천선선택화수단인공조성(AN)적물리층안전전수방법TAS-rAN。수선，유다근천선적발단，이용천선선택기술，선취능사합법접수방접수신조비최대적천선발송보밀소식；기차，유동빈전쌍공능력적수단，재접수도소식적동시，발송인공조성래우란절은방대보밀소식적절은。재 Nakagami-m 신도하，추도료안전중단개솔적폐합표체식，병기우차，득도비령안전용량적개솔표체식；통과점진안전중단개솔적추도，득도TAS-rAN방법적안전분집도。방진결과표명，여이유적TAS-single화TAS-Alamouti방법상비，TAS-rAN안전방법구유교강적은정성，차능제공경우적안전성능。
With the fast development of full-duplex technology in the same band, a novel hybrid scheme called Transmit Antenna Selection-receivever Artifical Noise (TAS-rAN), is proposed for lower complexity of beam- forming scheme and higher security of TAS in MISO wiretap channels. In this scheme, by using TAS protocol, the transmitter first selects a single antenna that maximizes the instantaneous Signal-to-Noise Ratio (SNR) at the full-duplex receiver. While the transmitter uses this antenna to transmit secrecy data, the full-duplex receiver sends Artificial Noise (AN) to confuse the potential eavesdropper. For the proposed protocol, Nakagami-m fading channels with different parameters for the main channel and the eavesdropper,s channel is considered, and a new closed-form expression for the exact secrecy outage probability is derived. The numerical simulation results demonstrate that the proposed TAS-rAN protocol is a robust secure system, and can offer higher secure performances than both existed single TAS-single and TAS-Alamouti schemes.