Optimal Pilot Length for Key Generation in Correlated Wireless Channels

被引：0

作者：

Li, Danqi ^{[1
]}

Yan, Shihao ^{[2
]}

Zhang, Jia ^{[3
]}

Sun, Jiande ^{[3
]}

Shu, Feng ^{[4
,5
,6
]}

机构：

[1] Nanjing Univ Sci & Technol, Sch Elect & Opt Engn, Nanjing 210094, Peoples R China

[2] Edith Cowan Univ, Sch Sci, Perth, WA 6027, Australia

[3] Shandong Normal Univ, Sch Informat Sci & Engn, Jinan 250061, Peoples R China

[4] Hainan Univ, Sch Informat & Commun Engn, Haikou 570228, Peoples R China

[5] Hainan Univ, Collaborat Innovat Ctr Informat Technol, Haikou 570228, Peoples R China

[6] Nanjing Univ Sci & Technol, Sch Elect & Opt Engn, Nanjing 210094, Peoples R China

来源：

IEEE WIRELESS COMMUNICATIONS LETTERS | 2024年 / 13卷 / 10期

关键词：

Channel estimation; Correlation; Wireless communication; Communication system security; Accuracy; Eavesdropping; Vectors; Pilot length; key generation; channel correlation; channel estimation; secret key capacity; INFORMATION;

D O I：

10.1109/LWC.2024.3444821

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

This letter examines the optimal pilot length for key generation in correlated wireless channels. We first deduce the secret key capacity as a function of the pilot length N and other system parameters. Then, derive two fixed-point equations to identify the optimal N with and without an eavesdropper. Our analysis and numerical results confirm the existence of the optimal N that maximizes the secret key capacity, and both results for optimal N are consistent. Furthermore, the optimal N generally decreases with average signal-to-noise ratio and maximum Doppler shift. Our examination can provide useful guidelines in designing practical key generation systems.

引用

页码：2767 / 2771

页数：5

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