CAJ | 학술논문

针对未来多天线通信系统的安全问题，提出了一种增强无线物理层安全的传输策略。该策略基于发射天线的选择以及人工噪声，并采用Alamouti编码。它可以使发射机和接收机以较低的复杂度代价提高合法信道的分集增益，同时有效干扰窃听信道，使通信系统获得更高的安全容量。对系统安全容量、天线数量、以及信息信号与人工噪声之间的功率分配等问题进行了研究，仿真结果表明，该传输策略能够有效地增强物理层安全。
침대미래다천선통신계통적안전문제，제출료일충증강무선물리층안전적전수책략。해책략기우발사천선적선택이급인공조성，병채용Alamouti편마。타가이사발사궤화접수궤이교저적복잡도대개제고합법신도적분집증익，동시유효간우절은신도，사통신계통획득경고적안전용량。대계통안전용량、천선수량、이급신식신호여인공조성지간적공솔분배등문제진행료연구，방진결과표명，해전수책략능구유효지증강물리층안전。
In this paper,an enhanced physical layer security communication scheme is proposed for the multiple antenna systems.The scheme employing transmit antenna selection and artificial noise,also Alamouti coding,improved diversity gain in legitimate channel with low complexity in the transmitter and receiver,and at the same time efficiently jammed the wiretap channel.Consequently it can increase the system secrecy capacity.We analyze the system secrecy capacity and the impacts of the number of antennas and the power allocation between the information signal and artificial noise.Simulation results demonstrate that the proposed scheme can effectively enhance the physical layer security.