Title :
Study on processing of multi-carrier phase-modulated signals from a laser heterodyne intrusion detecting system
Author :
Meng, Fanyong ; Li, Zhigang ; Guo, Zhuanyun ; Zhou, Dachuan
Author_Institution :
Hebei Univ. of Technol., Tianjin, China
Abstract :
Introduced a intrusion detecting system based on laser heterodyne interference technique. Analyzed the features of the multi-carrier phase-modulated signals from the detecting system, signal demodulation purpose and technical requirements are discussed, proposed the intrusion event judgment method by power spectrum analysis and realized the intrusion signal extraction by means of phase-lock-loop technique. Moreover, analyzed several issues affecting system performance and corresponding solutions are proposed.
Keywords :
laser beam applications; phase locked loops; phase modulation; security of data; intrusion signal extraction; laser heterodyne intrusion detecting system; multicarrier phase-modulated signal processing; phase-lock-loop technique; power spectrum analysis; signal demodulation; Bandwidth; Fiber lasers; Frequency modulation; Interference; Spectral analysis; Vibrations; intrusion detecting; laser heterodyne; multi-carrier; phase lock loop; phase-modulated signal; power spectrum;
Conference_Titel :
Signal Processing Systems (ICSPS), 2010 2nd International Conference on
Conference_Location :
Dalian
Print_ISBN :
978-1-4244-6892-8
Electronic_ISBN :
978-1-4244-6893-5
DOI :
10.1109/ICSPS.2010.5555830
