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

Volume

3

fYear

2010

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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/ICSPS.2010.5555830

Filename

5555830