物理层安全中无线信号强度的非均匀量化方案  

A non-uniform quantization scheme for wireless signal strength in physical layer security

作　　者：徐志江[1,4] 王晓敏 卢为党 陈芳妮[2] 华惊宇[3] 贡毅 Xu Zhijiang;Wang Xiaomin;Lu Weidang;Chen Fangni;Hua Jingyu;Gong Yi(College of Information Engineering,Zhejiang University of Technology,Hangzhou 310023;School of Information and Electronic Engineering,Zhejiang University of Science and Technology,Hangzhou 310023;School of Information and Electronic Engineering,Zhejiang Gongshang University,Hangzhou 310018;University Key Laboratory of Advanced Wireless Communications of Guangdong Province Department of Electrical and Electronic Engineering,Southern University of Science and Technology,Shenzhen 518055)

机构地区：[1]浙江工业大学信息工程学院,杭州310023 [2]浙江科技学院信息与电子工程学院,杭州310023 [3]浙江工商大学信息与电子工程学院,杭州310018 [4]南方科技大学电子与电气工程系,广东省普通高校先进无线通信技术重点实验室,深圳518055

出　　处：《高技术通讯》2020年第5期443-450,共8页Chinese High Technology Letters

基　　金：国家自然科学基金(61871348,61601409);深圳市科技计划(JSGG20180508151852303)资助项目。

摘　　要：利用无线信道的互易性和随机性来生成物理层安全密钥,以保护传输数据的安全性。在给定的无线信号强度高斯分布模型下,通过数值计算推导出了理论上均匀量化的密钥匹配率,指出均匀量化是一种失配率最高的量化方案。基于此,提出了一种非均匀量化方案,将信道测量的强度量化为多个比特值,并给出相应的密钥失配率。实验和仿真结果表明,所提出的非均匀量化方案优于均匀量化方案。The reciprocity and randomness of wireless channel are employed to generate the security key of physical layer to protect the security of transmission data.Under the given Gaussian distribution model of wireless signal strength,the uniform quantized key mismatch rate of uniform quantization scheme is derived theoretically by numerical calculation in the paper.Moreover,it is pointed out that the uniform quantization is a quantization scheme with the highest mismatch rate.To alleviate this problem,a non-uniform quantization scheme is proposed to quantize the strength of the channel measurement into multiple bit values and its corresponding mismatch rate is also given.The experimental and simulation results show that the proposed non-uniform quantization scheme is superior to the counterpart of the uniform quantization.

关 键 词：物理层安全 高斯分布 接收信号强度(RSS) 非均匀量化 密钥失配率 

分 类 号：TN9[电子电信—信息与通信工程]