基于随机天线阵的物理层安全通信系统峰均功率比问题研究  

Research on Peak-to-average Power Ratio Problem for the Physical Layer Security Communication System Using Random Antenna Array

作　　者：洪涛[1] 宋茂忠[2] 王保云[3] 

机构地区：[1]南京邮电大学通信与信息工程学院,南京210003 [2]南京航空航天大学电子信息工程学院,南京210016 [3]南京邮电大学自动化学院,南京210003

出　　处：《电子与信息学报》2015年第1期188-192,共5页Journal of Electronics & Information Technology

基　　金：国家自然科学基金(61302102;61271232);江苏省属高校自然科学研究面上项目(13KJB510023);国家博士后自然科学基金(2013M531390);南京邮电大学人才引进项目(NY212020)资助课题

摘　　要：采用多天线发射方式保障通信信息的安全传输是物理层安全通信研究领域中常采用的手段之一,但这种方式会导致发射信号高峰均功率比的缺点,从而影响合法用户的通信性能。该文从多天线发射的加权系数出发,定义了基于多天线发射方式的物理层安全通信信号峰均功率比(PAPR)概念,并且针对随机天线阵物理层安全通信系统提出一种基于部分传输序列的物理层安全通信信号PAPR抑制算法。仿真结果表明该文提出的PAPR抑制算法能在不降低发射信号安全性能的条件下有效地降低发射信号的PAPR值。Using multiple transmit antennas to guarantee the information security is one of the common methods in the field of physical layer security communication. However, this method leads to the transmit signal with the drawback of high Peak-to-Average Power Ratio（PAPR）, which degrades the communication performance for the desired receiver. In this paper, the PAPR conception for security communication signal based on the weighted antenna array is defined from the point view of weighted value. The degradation performance of the desired receiver is also analyzed. In addition, a PAPR reduction algorithm is proposed for the physical layer security communication system using a random antenna array. Simulation results show that the proposed algorithm reduces the PAPR value for the security communication signal under the condition that the security performance does not reduce.

关 键 词：无线通信 物理层安全 峰均功率比 部分传输序列 

分 类 号：TN92[电子电信—通信与信息系统]