Title :
Processing of multi-carrier phase-modulated signals of a heterodyne interference detecting system
Author :
Meng, Fanyong ; Li, Zhigang ; Guo, Zhuanyun ; Zhou, Dachuan
Author_Institution :
Hebei Univ. of Technol., Tianjin, China
Abstract :
A heterodyne interference detecting system for long distance security pre-warning are introduced. Analyzed the generation principles of the multi-carrier phase-modulated signals, according to the purpose of signal processing, realized the intrusion event judgment and positioning by means of power spectrum analysis, extracted the modulated signals caused by the intrusion event by means of phase-lock-loop technique. Several factors maybe affecting system performance are analyzed and corresponding solutions are proposed.
Keywords :
heterodyne detection; interference (signal); optical modulation; optical signal detection; phase modulation; signal processing; spectral analysis; intrusion event judgment; laser heterodyne interference detecting system; long distance security prewarning; multicarrier phase-modulated signal processing; phase-lock-loop technique; power spectrum analysis; Bandwidth; Frequency modulation; Interference; Phase modulation; Spectral analysis; Vibrations; heterodyne interference; multi-carrier; phase lock loop; pre-warning;
Conference_Titel :
Image and Signal Processing (CISP), 2010 3rd International Congress on
Conference_Location :
Yantai
Print_ISBN :
978-1-4244-6513-2
DOI :
10.1109/CISP.2010.5647445
