title: A multiple phase demodulation method for high resolution of the laser scanner.
abstract: To have higher resolution of distance in the laser scanner using the phase demodulation method, signal should be modulated with a high frequency. In the signal processing of modulation and demodulation, it is inevitable to amplify the signals. However, it is not easy to amplify the high frequency since the amplifying gain is restricted by the frequency bandwidth. It is advantageous to demodulate using an intermediate frequency in which high gain amplification as well as less contaminated signal is obtained. Analytical and experimental results are presented to show how the intermediate frequency demodulation method works and how good performance is obtained in the time and frequency domains.
authors.affiliation: Department of Mechatronics, Gwangju Institute of Science and Technology, 1 Oryong-dong, Buk-gu, Gwangju 500-712, Republic of Korea.
authors.forename: Heesun
authors.initials: H
authors.lastname: Yoon
authors.forename: Woosub
authors.initials: W
authors.lastname: Yeom
authors.forename: Seonggu
authors.initials: S
authors.lastname: Kang
authors.forename: Jinpyo
authors.initials: J
authors.lastname: Hong
authors.forename: Kyihwan
authors.initials: K
authors.lastname: Park