Software-defined ground-based synthetic aperture radar interferometry

Nicusor Ciprian Silvestru; Mirel Paun; Razvan Tamas

doi:10.1117/12.2642460

2 March 2023 Software-defined ground-based synthetic aperture radar interferometry

Nicusor Ciprian Silvestru, Mirel Paun, Razvan Tamas

Proceedings Volume 12493, Advanced Topics in Optoelectronics, Microelectronics, and Nanotechnologies XI; 124932B (2023) https://doi.org/10.1117/12.2642460
Event: Advanced Topics in Optoelectronics, Microelectronics and Nanotechnologies 2022, 2022, Constanta, Romania

Abstract

This paper presents an experimental implementation of ground-based interferometric synthetic aperture radar based on the low cost USRP platform and a computer. The purpose of the proposed system is to measure small displacements of the monitored targets over a long time period. These types of measurements are particularly useful in the field of civil engineering and ecology. Common applications are landslide monitoring or bridge and building deformation analysis, as well as glacier movement monitoring. The system implements stepped-frequency radar operation with a maximum bandwidth of 1500 MHz (500 – 2000 MHz). As expected with all interferometric measurements, due to the cyclic nature of the phase shift, the displacement must be smaller than a certain fraction of the wavelength of operation; otherwise the result will be ambiguous. In our case the displacement must be smaller (in absolute value) than a quarter of the transmitted wavelength. Due to the fact that in a software-defined radio the frequency is user selectable in a very wide range, the system can be configured to adapt to the magnitude of the expected displacement.

Citation Download Citation

Nicusor Ciprian Silvestru, Mirel Paun, and Razvan Tamas "Software-defined ground-based synthetic aperture radar interferometry", Proc. SPIE 12493, Advanced Topics in Optoelectronics, Microelectronics, and Nanotechnologies XI, 124932B (2 March 2023); https://doi.org/10.1117/12.2642460

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KEYWORDS

Interferometry

Radar

Synthetic aperture radar

Image processing

Antennas

Phase shifts

Receivers

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