The authors present a technique for applying quadrature demodulation to determine the frequency of Doppler signals. This technique enables low-frequency signals with less than one signal period to be measured. The dependence of measurement error on signal-to-noise-ratio and measurement time is also investigated.
References
-
-
1)
-
J. Czarske
.
(1996)
Verfahren zur Messung und Auswertung der Interferenzphase in der Laser-Doppler-Velocimetrie.
-
2)
-
J. Czarske
.
Method for analysis of the fundamental measuring uncertainty of laserDopplervelocimeters.
Opt. Lett.
,
522 -
524
-
3)
-
Müller, H., Többen, H., Strunck, V., Arndt, V., Dopheide, D.: `Quadrature demodulation in novelfrequency shift LDV systems as an alternative to fringe biasing', Proc. Conf. Laser Anemometry, 1995, Hilton Head, SC, USA, p. 455–458FED–Vol. 229, .
-
4)
-
Boashash, B., O'Shea, P., Arnold, M.: `Algorithms for instantaneous frequency estimation: acomparative study', Proc. Advanced signal processing algorithms, architectures andimplementations, SPIE, 1990, 1348, p. 126–148.
http://iet.metastore.ingenta.com/content/journals/10.1049/el_19980389
Related content
content/journals/10.1049/el_19980389
pub_keyword,iet_inspecKeyword,pub_concept
6
6