无线通信传输目标信号方向调制研究  

Research on Target Signal Directional Modulation of Wireless Communication Transmission

作　　者：陆音[1] 韩文佳 LU Yin;HAN Wen - jia(Nanjing University of Posts and Telecommunications, Jiangsu Provincial Key Laboratory of Wireless Communications, Nanjing Jiangsu 210003, China)

机构地区：[1]南京邮电大学江苏省无线通信重点实验室,江苏南京210003

出　　处：《计算机仿真》2018年第4期149-153,共5页Computer Simulation

基　　金：国家自然科学基金资助项目(61271236)

摘　　要：方向调制技术是无线网络物理层安全通信的关键技术之一。由于方向调制信号的信息波束宽、旁瓣信息泄露严重,不能保证较高的安全性能,为此从降低接收机误码率的角度来研究无线通信传输目标信号方向调制的问题。首先,根据远场分布的相位在期望方向的畸变程度来建立理想的目标函数模型,然后在该模型下提出一种基于相位赋形的方向调制算法。该算法可在无线网络中更好地逼近理想目标函数。最后,对相位赋形方向调制算法进行计算机仿真。结果表明:所提算法发射的信号具有更窄的信息波束宽度,很好地解决了旁瓣信息泄露的问题,有更高的安全性能。Directional Modulation （DM） technique is one of the key technologies for wireless network physical layer security communication. Due to the bad information beam - width and information disclosure of side lobe, the DM signal has low safety performance. The target signal DM problem of wireless communication transmission based on the bit error rate of the receiver was studied in this paper. Firstly, the desired target signal distribution function was set up for strengthening the distortion of the far - field distribution in the desired direction. Then, a DM signal synthesis algorithm based on beam - forming technique was proposed, which can restore the ideal target function bet- ter. Finally, the algorithm was simulated through Matlab. Simulation results show that the proposed algorithm pro- vides a better information beam - width compared with the traditional wireless communication, which solves the prob- lem of information disclosure of side lobe, and has a higher security performance.

关 键 词：目标信号 方向调制 波束赋形 信息泄露 

分 类 号：TN929[电子电信—通信与信息系统]