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This paper presents a new development of a 24 GHz radar frontend with a Rotman Lens as a beamforming network. The main objective of the project is the accurate detection and localization of multiple targets at the same distance from the radar system. Interferometric systems determine the direction for a target with the phase difference through at least two receiving antennas. If multiple targets are...
A stand-alone perimeter surveillance system has been developed using a combination of radar sensors operating at 24GHz and a HD pan-tilt-zoom camera. The system provides the capability to detect and track intruders across a monitored area even at poor view conditions.
Moving targets induce unique micro-Doppler signatures. After conducting several measurements with human, vehicle, UAV and animal as targets using a 24 GHz radar, the micro-Doppler signatures are observed through time-velocity diagrams. A simple set of micro-Doppler features are then selected and extracted from the measurement data. Results show the potential of radar as a ground surveillance applications,...
Moving targets induce unique micro-Doppler signatures. After conducting several measurements with human, vehicle, UAV and animal as targets using a 24 GHz radar, the micro-Doppler signatures are observed through time-velocity diagrams. A simple set of micro-Doppler features are then selected and extracted from the measurement data. Results show the potential of radar as a ground surveillance applications,...
The parameter estimation of a distributed target with several moving elements is an important question in radar based security applications. In this paper, a solution of this problem is proposed by using an incoherent radar sensor network as well as signal processing methods known from the area of Compressive Sensing. Thereby, three different algorithms are evaluated: Orthogonal Matching Pursuit (OMP),...
This contribution describes a security assistant system comprising distributed millimeter wave radar sensors and chemical sensors. The system is deployable for a wide range of security applications, e. g. passenger security checks on airports, surveillance of people crowds in mass transportation systems or in other security-sensitive areas. The system looks for body-worn hazardous chemical substances...
In this paper, the setup of a rotating 94 GHz millimeter wave FMCW radar for passenger inspection on airports is presented. The radar frontend comprises 5 receive channels in order to look the person under test from different aspect angles. A special focus is on the calibration of the integrated VCO of the radar module. Its non-linearity has to be compensated precisely. Else, the phase of the intermediate...
In the following paper, a new concept for increasing the aiport security is proposed. As a part of this innovative system, a W-band person scanner with a circular aperture for 360° scans has been built up. The usage of the Synthetic Aperture Radar (SAR) principle allows the detection of concealed objects with a resolution of 3mm in azimuth and 3 cm in range direction.
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