Open AccessOn the LFM signal improvement by piecewise vibrational resonance using a new spectral amplification factor
Author(s) -
Jia Pengxiang,
Yang Jianhua,
Zhang Xin,
Sanjuán Miguel A.F.
Publication year - 2019
Publication title -
iet signal processing
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.384
H-Index - 42
ISSN - 1751-9683
DOI - 10.1049/iet-spr.2018.5101
Subject(s) - piecewise , aperiodic graph , signal (programming language) , piecewise linear function , amplification factor , computer science , algorithm , mathematics , physics , mathematical analysis , telecommunications , bandwidth (computing) , amplifier , programming language , combinatorics
The authors construct the piecewise vibrational resonance (VR) method by introducing the piecewise idea and combine the re‐scaled and twice sampling methods for the linear frequency modulated (LFM) signal. Importantly, they put forward a new spectral amplification factor to quantify the VR. The new spectral amplification factor has some advantages as compared with the cross‐correlated coefficient, which can also be used to quantify the aperiodic VR. The top value of the spectrum amplification factor is the necessary and sufficient condition for the occurrence of the optimal VR phenomenon. Here, they discuss the effects of different parameters on VR by using some numerical examples. The method described in this study provides an effective way to improve the LFM signal, and even other kinds of frequency modulated signals.