Physical layer security enhanced system with
under-sampling spectrum-sparse signals

doi:DOI: 10.19682/j.cnki.1005-8885.2019.1012

The Journal of China Universities of Posts and Telecommunications ›› 2019, Vol. 26 ›› Issue (4): 8-16.doi: DOI: 10.19682/j.cnki.1005-8885.2019.1012

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Physical layer security enhanced system with

under-sampling spectrum-sparse signals

Li Lintao, Liu Yuanan

School of Electronic Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China

Received:2019-04-09 Revised:2019-07-30 Online:2019-08-31 Published:2019-10-29
Contact: Corresponding author: Li Lintao, E-mail:Lintao.Li@ieee.org E-mail:Lintao.Li@ieee.org
About author:Corresponding author: Li Lintao, E-mail:Lintao.Li@ieee.org
Supported by:

Abstract

Abstract: The ubiquity of wireless communication systems has resulted in extensive concern regarding their security issues.

A practical secure transmission scheme based on under-sampling spectrum-sparse signals is designed. Secure

transmission is initialized as the intended receiver transmits a pilot signal for the transmitter, to perform channel

sounding and clock synchronization according to the channel reciprocal principle. Then, sampling clock offset

compensation and precoding method based on channel state information (CSI) can be conducted at the transmitter's

end. Because the intended receiver adopts an under-sampling method based on active aliasing which depends very

sensitively on accurate sampling clock and CSI, the eavesdroppers can hardly intercept the signal. Closed form

expression of symbol error rate (SER) at the intended receiver's end and secrecy capacity in fading wiretap

channel has been derived. Numerical evaluation and simulations are carried out to validate the effectiveness of the

proposed strategy.

Key words: physical layer security, spectrum-sparse signal, secrecy capacity

CLC Number:

TN918

Li Lintao, Liu Yuanan.

Physical layer security enhanced system with

under-sampling spectrum-sparse signals

[J]. The Journal of China Universities of Posts and Telecommunications, 2019, 26(4): 8-16.

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Physical layer security enhanced system with

under-sampling spectrum-sparse signals

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