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Circular Regression in a Dual-Phase Lock-In Amplifier for Coherent Detection of Weak Signal

Lock-in amplification (LIA) is an effective approach for recovery of weak signal buried in noise. Determination of the input signal amplitude in a classical dual-phase LIA is based on incoherent detection which leads to a biased estimation at low signal-to-noise ratio. This article presents, for the...

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Principais autores: Gaoxuan Wang, Serge Reboul, Jean-Bernard Choquel, Eric Fertein, Weidong Chen
Formato: Artigo
Idioma:Inglês
Publicado em: MDPI AG 2017-11-01
coleção:Sensors
Assuntos:
weak signal detection
lock-in amplifier
signal processing
circular regression
laser photoacoustic spectroscopy
trace gas detection
Acesso em linha:https://www.mdpi.com/1424-8220/17/11/2615
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