广义空间调制系统中的物理层抗窃听传输方案

发布时间：2018-04-09 16:29

本文选题：物理层安全　切入点：广义空间调制　出处：《哈尔滨工业大学学报》2017年05期

【摘要】：为实现信息的保密传输,提出一种基于广义空间调制技术的物理层安全方案.发射端根据合法信道的状态信息对信号进行预处理,使合法接收者接收到来自各激活发射天线的信号相位对齐,并对不同激活天线组合的信号进行不同的相位旋转,提高合法接收者的接收性能.而窃听者接收到的信号相位仍然为随机分布,接收性能远低于合法接收者,有效地保护通过天线索引传输的信息.发送端同时发送指向窃听者的人工噪声,保护通过幅相调制携带的信息不被窃听.对保密容量、误码性能和信号与人工噪声的功率分配进行理论分析,仿真结果表明,通过合理分配功率,合法接收者的误码性能明显优于窃听者,能获得可观的系统保密容量.
[Abstract]:In order to realize the secure transmission of information, a physical layer security scheme based on generalized spatial modulation is proposed.The transmitter preprocesses the signal according to the state information of the legitimate channel, so that the legitimate receiver receives the phase alignment of the signal from each active transmitting antenna, and rotates the signal with different combinations of active antennas.Improves the reception performance of legitimate recipients.The received phase of the eavesdropper is still randomly distributed, and the receiving performance is much lower than that of the legitimate receiver, which effectively protects the information transmitted through the antenna index.The transmitter also transmits artificial noise to eavesdroppers to protect information carried by amplitude-phase modulation from eavesdropping.The theoretical analysis of security capacity, error performance and power allocation between signal and artificial noise shows that the error performance of legitimate receiver is obviously better than that of eavesdropper, and the system security capacity can be obtained by allocating power reasonably.
【作者单位】：移动通信技术重庆市重点实验室(重庆邮电大学);
【基金】：国家自然科学基金(61471076) 重庆市基础与前沿研究计划(cstc2015jcyjA40047) 长江学者和创新团队发展计划(IRT1299) 重庆市科委重点实验室专项经费
【分类号】：TN918.91

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