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Spectrum correlation of beat signals in the FM-CW radar level meter and application for precise distance measurement

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5 Author(s)
J. C. Chun ; Dept. of Comput. & Commun., Uiduk Univ., Kyung-Ju, South Korea ; T. S. Kim ; J. M. Kim ; Z. S. Lim
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In this paper, we analyze spectrum correlation of beat signals in the microwave level meter based on the FM-CW radar. For industrial applications, level meters must have high precision, which requires a good linearity of VCO. But, in practice, it is very complicated or very expensive to make VCO linear enough to be acceptable in the industrial field. We propose a measurement algorithm using the fact that there exists a peak in the spectrum correlation of beat signals when range difference is adequately small. This makes it possible to determine the range difference in a precise manner even using a practical VCO. We develop the background theory of correlation and show some results using this algorithm.

Published in:

Microwave Symposium Digest, 2001 IEEE MTT-S International  (Volume:3 )

Date of Conference:

20-24 May 2001