Indexed by: Journal paper

Document Code: 10.1007/s10909-012-0719-z

First Author: Lantao Huang

Correspondence Author: Xiaotao Han

Co-author: Xiaotao Han*, Jiangtao Shi, Jianfeng Xie, Liang Li.

Journal: Journal of Low Temperature Physics

Included Journals: EI、SCI

Affiliation of Author(s): 国家脉冲强磁场科学中心

Document Type: J

Volume: 170

Issue: 5-6

Page Number: 469-474

ISSN No.: 0022-2291

Key Words: Weak signal detection Digital Lock-In amplifier Wavelet filter

Date of Publication: 2013-03-01

Abstract: An improved digital lock-in technique with a wavelet filter is developed for the weak signals detection. A simulated signal modulated with a frequency of 40 kHz and contaminated by white noise is constructed to estimate the performance of the system. In this study, the selection of the wavelet filter parameters, such as the decomposition level, the wavelet basis and the threshold strategy is discussed. Finally, the performance of the system in different conditions is presented.