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Journal of Electrical and Computer Engineering
Volume 2010, Article ID 897429, 6 pages
Research Article

A New Demodulation and Modulation Method Designed for FMCW Radar

1School of Electronic Information, Wuhan University, Wuhan 430079, China
2Department of Geosciences, University of Hamburg, Hamburg 20146, Germany

Received 6 December 2009; Accepted 26 January 2010

Academic Editor: John N. Sahalos

Copyright © 2010 Wei Shen and Biyang Wen. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


An efficient demodulation method designed for FMCW (Frequency-Modulated Continuous Wave) radar is presented. It is a kind of modified DFT (IDFT) algorithm; the spectrum segment of interest can be easily extracted from the original signal without calculating the whole DFT/FFT. It provides fast demodulation and extraction of desired frequency bands in our HFSWR (High-Frequency Surface Wave Radar) system. The proposed approach enhances the performances of radar system and reduces the computing complexity. The new structure could also be inversely used for signal modulation. And also arbitrary sampling rate conversion could be achieved with the combination of forward and backward structure.