东南大学学报（自然科学版）2016，Vol.46Issue(2)：237-242,6.DOI:10.3969/j.issn.1001-0505.2016.02.002
信道衰落特性的功率检测法与冲激响应法的差异性
Differences of power detection method and impulse response method based on channel fading characteristics
摘要
Abstract
Aiming at the channel fading characteristics in the wireless physical layer security technol-ogy, two common channel feature extraction methods, i.e, the power detection method and the channel impulse response ( CIR) method, are investigated and the corresponding mathematics mod-els are established.The relationship of these two methods is analyzed and their characteristics are al-so clarified.On this basis, the average mutual information of the extracted feature measurements of two communication parties is calculated using these two methods.And by taking the mutual informa-tion as metrics, their key extraction efficiencies are compared.The simulation results show that the received waveforms obtained by the power detection method reflect the channel fading feature effec-tively and is independent of the carrier frequency offset, but the key extraction efficiency is lower than CIR method.Besides, the simulation results in the long term evolution ( LTE) wireless channel environments indicate that the channel mobility has a close relation with the key extraction rate and the effects on these two methods are different.关键词
物理层安全/衰落/功率检测法/信道冲激响应法/密钥提取效率Key words
physical layer security/fading/power detection method/CIR ( channel impulse re-sponse) method/key extraction efficiency分类
信息技术与安全科学引用本文复制引用
韩远致,胡爱群..信道衰落特性的功率检测法与冲激响应法的差异性[J].东南大学学报（自然科学版）,2016,46(2):237-242,6.基金项目
国家自然科学基金资助项目（61571110）． （）
