基于随机噪声调制的新型隐蔽通信系统  

A Novel Covert Communication System Based on random Noise Modulation

作　　者：徐志江[1,2] 季宪瑞 陈芳妮 卢为党[1,2] 华惊宇 贡毅[2] XU Zhijiang;JI Xianrui;CHEN Fangni;LU Weidang;HUA Jingyu;GONG Yi(College of Information Engineering,Zhejiang University of Technology,Hangzhou 310023,China;School of Information and Electronic Engineering,Zhejiang University of Science and Technology,Hangzhou 310018,China;School of Information and Electronic Engineering,Zhejiang Gongshang University,Hangzhou 310018,China;Shenzhen Engineering Laboratory of Intelligent Information Processing for IoT,Southern University of Science and Technology,Shenzhen Guangdong 518055,China)

机构地区：[1]浙江工业大学信息工程学院,杭州310023 [2]南方科技大学深圳市物联网智能信息处理工程实验室,广东深圳518055 [3]浙江科技学院信息与电子工程学院,杭州310023 [4]浙江工商大学信息与电子工程学院,杭州310018

出　　处：《传感技术学报》2019年第4期586-590,共5页Chinese Journal of Sensors and Actuators

基　　金：国家自然科学基金项目(61871348;61601409;61471322);深圳市科技计划项目(JCYJ20170817110410346)

摘　　要：在无线传感器网络中,为了实现信息的隐蔽通信,提出了一种基于随机噪声调制的新型隐蔽通信系统。隐蔽通信系统的二进制消息序列调制联合正态分布噪声序列的相关系数。作为隐蔽通信系统信号的联合正态分布噪声,叠加到传统数字通信系统调制器的输出。在接收端,相关系数的估计值经过硬判决之后恢复出隐蔽系统的的二进制消息。所提出方案的关键问题,例如信道估计和符号同步,则由传统的数字通信系统解决。从理论上推导出了隐蔽通信系统的误码率。仿真结果表明,所提出的系统具有较低的误码率性能,且与理论值一致。To realize concealed communication of information in wireless sensors networks,a novel covert communication system based on random noise modulation is proposed in this paper. The correlation coefficient of a joint normal distribution noise sequence is modulated by a binary stream to achieve a covert communication system. Then the joint normal distribution noise is superimposed on the output of the digital modulator of the conventional communication system. At the receiving end,the correlation coefficient is estimated from the received signal and the covert binary stream is recovered by a hard decision. The key issues of the proposed scheme,such as channel estimation and symbol synchronization,are solved by the conventional digital communication system. The bit error rate of the proposed covert communication system is derived theoretically. Simulation results show that the proposed covert system has good bit error rate performance and is consistent with the theoretical derivation.

关 键 词：无线传感器网络 隐蔽通信 相关系数 联合正态分布 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]