Far- and Near Range Measurements with a Synthetic Aperture Radar for Educational Purposes and Comparison of Two Different Signal Processing Algorithms

In this paper two simple synthetic aperture radar (SAR) methods are applied on data from a 24 GHz FMCW radar implemented on a linear drive for educational purposes. The data of near and far range measurements are evaluated using two different SAR signal processing algorithms featuring 2D-FFT and fre...

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Bibliographic Details
Published in:Advances in radio science 2022-02, Vol.19, p.221-232
Main Authors: Berg, Jonas, Müller, Simon, Diewald, Andreas R
Format: Article
Language:English
Subjects:
Algorithms
Antennas
Artificial satellites in remote sensing
Azimuth
Comparative analysis
Education
Electric motors
Laboratories
Radar systems
Reflectors
Run time (computers)
Signal processing
Students
Synthetic aperture radar
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Summary:In this paper two simple synthetic aperture radar (SAR) methods are applied on data from a 24 GHz FMCW radar implemented on a linear drive for educational purposes. The data of near and far range measurements are evaluated using two different SAR signal processing algorithms featuring 2D-FFT and frequency back projection (FBP) method (Moreira et al., 2013). A comparison of these two algorithms is performed concerning runtime, image pixel size, azimuth and range resolution. The far range measurements are executed in a range of 60 to 135 m by monitoring cars in a parking lot. The near range measurement from 0 to 5 m are realised in a measuring chamber equipped with absorber foam and nearly ideal targets like corner reflectors. The comparison of 2D-FFT and FBP algorithm shows that both deliver good and similar results for the far range measurements but the runtime of the FBP algorithm is up to 150 times longer as the 2D-FFT runtime. In the near range measurements the FBP algorithm displays a very good azimuth resolution and targets which are very close to each other can be separated easily. In contrast to that the 2D-FFT algorithm has a lower azimuth resolution in the near range, thus targets which are very close to each other, merge together and cannot be separated.
ISSN:1684-9973
1684-9965
1684-9973
DOI:10.5194/ars-19-221-2022