Affiliation:
1. Department of Information Engineering, University of Florence, 50139 Firenze, Italy
Abstract
Ground-based synthetic aperture radars (GBSAR) are popular instruments widely used for the monitoring of infrastructures. One of the main problems of ground-based interferometric radars is the elevation ambiguity. Multiple-input multiple-output (MIMO) arrays could solve this problem. This work proposes a study on possible MIMO configurations to achieve elevation resolution in ground-based radar measurements. Specifically, two array configurations are compared: a random sparse array suitable for the compressive sensing technique, and a non-uniform array. The two solutions are compared by means of simulations and experimental tests. An ad hoc system has been developed to jointly test the two configurations, and results obtained in a controlled and real urban scenario are shown. It is found that both systems are able to solve elevation ambiguity. The non-uniform array seems to achieve good performance in a general scenario, while the CS processing can outperform the other only after optimization, depending on the specific scenario and application.
Subject
Electrical and Electronic Engineering,Computer Networks and Communications,Hardware and Architecture,Signal Processing,Control and Systems Engineering
Reference36 articles.
1. Remote sensing of building structural displacements using a microwave interferometer with imaging capability;Pieraccini;NDT E Int.,2004
2. Static Testing of a Bridge Using an Interferometric Radar: The Case Study of “Ponte degli Alpini”, Belluno, Italy;Dei;Sci. World J.,2013
3. Di Pasquale, A., Nico, G., Pitullo, A., and Prezioso, G. (2018). Monitoring Strategies of Earth Dams by Ground-Based Radar Interferometry: How to Extract Useful Information for Seismic Risk Assessment. Sensors, 18.
4. Pieraccini, M., Rojhani, N., and Miccinesi, L. (2018, January 26–28). Ground Based Synthetic Aperture Radar with 3D Imaging Capability. Proceedings of the 2018 15th European Radar Conference (EuRAD), Madrid, Spain.
5. Fishler, E., Haimovich, A., Blum, R., Chizhik, D., Cimini, L., and Valenzuela, R. (2004, January 29–29). MIMO radar: An idea whose time has come. Proceedings of the 2004 IEEE Radar Conference (IEEE Cat. No.04CH37509), Philadelphia, PA, USA.