Title :
The determination of instantaneous displacement by envelope detection
Author :
Lang, Kuo-Chen ; Lin, Cheng-Min ; Chung, Chiu-Chiao ; Teng, Hui-Kang
Author_Institution :
Dept. of Comput. & Commun. Eng., Nan-Kai Univ. of Technol., Nantou, Taiwan
Abstract :
A simple envelope detection is developed to determine the small phase shift. This technique is demonstrated by sampling the quadrature signals given by a heterodyne interferometer, which is able to measure the displacement with λ/104 sensitivity.
Keywords :
displacement measurement; heterodyne detection; signal sampling; envelope detection displacement; heterodyne interferometer; phase shift; quadrature signal sampling; Displacement measurement; Frequency modulation; Interference; Maximum likelihood decoding; Maximum likelihood detection; Optimized production technology; Sensitivity;
Conference_Titel :
OptoElectronics and Communications Conference (OECC), 2010 15th
Conference_Location :
Sapporo
Print_ISBN :
978-1-4244-6785-3
