基于USRP与OFDM信道响应的密钥提取实现  

Realization of Key Extraction based on USRP and OFDM Channel Response

作　　者：程伟[1] 谢非佚 张腾月[1] 文红[1] 

机构地区：[1]电子科技大学通信抗干扰国家级重点实验室,四川成都611731

出　　处：《通信技术》2017年第3期513-519,共7页Communications Technology

基　　金：四川省科技支撑项目(No.2015GZ0090;2015GZ0092);863项目(No.2015AA01A707)~~

摘　　要：无线信道的互易性及信道特征随机性是基于信道的物理层密钥生成技术的基础。完整的密钥生成技术包括信道探测、信道特征提取、量化、信息协商、保密增强五个阶段。已经有很多理论以及仿真证明了密钥提取的可行性,这里在USRP无线电设备建立的MIMO-OFDM系统上对密钥的提取进行实现。概述物理层密钥生成过程,阐述提取密钥方法的实现过程,以期为进一步研究密钥生成技术提供重要的参考。The reciprocity of wireless channel and the randomness of channel characteristic is the foundation of physical-layer key generation technology based on the channel. The complete key generation technology involves five steps： channel probing, randomness extraction, quantification, information reconciliation and privacy application. Various theories and simulation verify the feasibility of key extraction. The first four steps of key extraction are realized via using MIMO-OFDM system established by USRP radio. This paper summarizes the physical-layer key generation process, expounds the implementation of key extraction, hoping to provide some important reference for the further research of key generation technology.

关 键 词：密钥提取实现 USRP无线电设备 MIMO—OFDM系统 信道响应 

分 类 号：TN918.91[电子电信—通信与信息系统]