An Improved Key Generation Scheme Based on Multipath Channel Measurements  

作　　者：HAN Yuanzhi HU Aiqun 

机构地区：[1]School of Information Science and Engineering, Southeast University, Nanjing 210096, China

出　　处：《Chinese Journal of Electronics》2017年第1期185-191,共7页电子学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.61571110);the National Basic Research Program of China(973 Program)(No.2013CB338003)

摘　　要：Channel reciprocity is a vital component for the key generation from multipath channels. In this paper, we introduce the effect of delay between measures on the channel reciprocity, build an Autoregression(AR)model to approximate time-varying channel measurements and apply a linear prediction method to reduce the measurement errors and to enhance the dependency between measurements of two communication parties. In the following bit conversion, we propose a novel quantization scheme named the Probability distance method(PDM) and compare its performance with other existing methods theoretically. The simulation results show that the optimal solution to the linear prediction problem can effectively increase the channel reciprocity in the assumed channel models.The proposed PDM can achieve a lower disagreement rate with acceptable costs.Channel reciprocity is a vital component for the key generation from multipath channels. In this paper, we introduce the effect of delay between measures on the channel reciprocity, build an Autoregression（AR）model to approximate time-varying channel measurements and apply a linear prediction method to reduce the measurement errors and to enhance the dependency between measurements of two communication parties. In the following bit conversion, we propose a novel quantization scheme named the Probability distance method（PDM） and compare its performance with other existing methods theoretically. The simulation results show that the optimal solution to the linear prediction problem can effectively increase the channel reciprocity in the assumed channel models.The proposed PDM can achieve a lower disagreement rate with acceptable costs.

关 键 词：Physical layer security Key generation Linear prediction Multipath 

分 类 号：TN918.4[电子电信—通信与信息系统]