Deep learning offers interesting tools for radar data processing. This letter presents a signal processing method using a neural network to increase the range resolution of frequency-modulated continuous wave radar. The duration of the beat signal can be increased in the time domain for a better frequency resolution during conventional spectral estimation. This technique allows the radar bandwidth limitation to be exceeded and improves the sensing performance. A methodology is proposed as well as experimental results on real radar signal.

An original monostatic UWB FMCW radar architecture has been developed for GPR applications. The radiation system is composed of a single antenna associated with a double switching configuration to minimize the compactness of the antenna system while ensuring a sufficient dynamic range. Moreover, an analog correction technique has been developed to linearize a low-cost free-running UWB Voltage Controlled Oscillator (VCO) and to enable operating frequency selection. A functional demonstrator has been designed and associated measurements are proposed.

UAV-mounted GPR are a very attractive way to detect buried objects without ground contact. However, to be efficient, conventional GPR systems use a large bandwidth turned towards low frequencies for better penetration into the ground, the objective of this paper is to discuss possible solutions to reduce the system size and weight in the 0.3-1GHz frequency band by using single switched antenna. The proposed choices are supported by a complete simulation of the RF chain performed using gprMax and Advanced Design System.

This paper presents an original Ultra Wide Band (UWB) radar platform based on a coherent sub-sampling technique. The receiver of this UWB radar has a wide RF bandwidth [DC-5] GHz, and is based on the use of a Track and Hold Amplifier (THA) coupled with a Coherent Interleaving Sampling (CIS) technique. A SAR (Synthetic Aperture Radar) radar demonstration is realized and allows obtaining high dynamic images with a centimeter range resolution.