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3D MIMO GPR

​Ground-penetrating radar for real-time detection and 3D image reconstruction of subsurface structure
Published on 26 June 2025





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3D MIMO GPR​​​​​​​​​​

Ground-penetrating radar for real-time detection and 3D image reconstruction of subsurface structures​

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CEA-Leti’s ground-penetrating radar (GPR) technology enables high-precision, real-time georeferenced 3D imaging of underground structures. Based on an advanced multiple-input multiple-output (MIMO) architecture, the solution capitalizes on CEA-Leti’s extensive expertise in wireless system design—spanning propagation modeling, antenna design, signal processing, RF front-ends and platforms, and precise multi-modal geolocation algorithms.​

What it can do

This 3D radar technology is specifically designed for civil engineering applications, offering detailed three-dimensional imaging of underground utilities such as pipes, cables, and other buried infrastructures. The high-resolution images are accurately geolocated with centimeter-level precision and are being integrated into underground digital twin models. In addition to utility mapping, the radar provides real-time soil permittivity without calibration. Broader applications could include the detection of underground cavities and mines.​


What makes it unique

This new radar system is powered by innovations across multiple domains: 

  • ​A compact, wide-band multi-antenna system, the result of extensive miniaturization efforts 
  • Radio-frequency and digital electronics design for precise signal generation and acquisition 
  • Advanced algorithms and signal processing enabling the detection and identification of buried targets by leveraging the capabilities of multiple antennas 
  • Robust multimodal geolocation delivering centimeter-level accuracy 
  • User ergonomics and human-machine interface for intuitive operation and usability These advances reflect CEA-Leti’s multidisciplinary expertise in wireless technologies.​​​

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Working with CEA-Leti
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Global transportation infrastructure construction and maintenance leader Colas Group has been working with the CEA for many years. Faced with staffing shortages and excavation-related risks, the company turned to CEA-Leti in 2019 for a detection solution operable by all Colas employees. The result is a simple, accurate subsurface mapping technology for civil engineering projects that leverages algorithms rather than operator interpretation of images, reducing human error. The solution is now being field-tested by Colas, and the technology is ready for development for new use cases, such as defense.


At a glance

  • Wide band detection: 100 MHz to 2 GHz 
  • Full MIMO 64-channel transmission 
  • Can detect structures up to 5 meters deep​​

Interested in
this technology?

 Contact 

  Fl​yer