基于CIR的物理密钥生成技术的MAQ量化与VQ量化策略研究

Quantization Strategy of MAQ and VQ based on CIR Physical Key Generation Technology

基于无线信道特征的物理层密钥提取方法,为无线通信安全提供了新的思路。对基于信道脉冲响应(CIR)的物理密钥生成系统模型进行研究,主要研究多比特自适应量化(MAQ)和矢量量化(VQ)两种量化策略,并用MATLAB仿真软件实现物理密钥生成系统,统计分析两种量化方式后生成物理密钥的不一致率。仿真结果表明:MAQ量化方案物理密钥的生成速率较高,但VQ量化方案物理密钥的一致性更好。

The physical layer key extraction method based on wireless channel characteristics provides a new idea for wireless communication security.A physical impulse generation system model based on CIR(channel impulse response)is explored,with emphasis on two kinds of quantization strategies:MAQ(multi-bit adaptive quantization)and VQ(vector quantization),and MATLAB simulation software is used to implement the physical key generation system,and the two kinds of quantization methods to generate the inconsistency rate of the physical key are statistically analyzed.The simulation results indicate that the generation rate of the physical key of MAQ quantization scheme is higher,while the consistency of the physical key of VQ quantization scheme is better.