Three-Dimensional Velocity Measurement Using a Dual Axis Millimeter-Wave Interferometric Radar
Year: 2021
Type: article
Abstract: In this work, a method for directly measuring target velocity in three dimensions using a dual axis correlation interferometric radar is presented. Recent advances have shown that the measurement of a target’s angular velocity is possible by correlating the signals measured at spatially diverse aperture locations. By utilizing multiple orthogonal baselines and using conventional Doppler velocity methods to obtain radial velocity, a full 3-D velocity vector can be obtained using only three receive antennas and a single transmitter, without the need for tracking. A 41.8-GHz dual axis interferometric radar with a${7.26\lambda }$antenna baseline is presented along with measurements of a target moving parallel to the plane of the radar array, and of a target moving with components of both radial and tangential velocity. These experiments achieved total velocity root-mean-square errors (RMSEs) of 41.01 mm$\cdot \,\,\text{s}^{-1}$(10.5%) for a target moving along a plane parallel to the array, and 45.07 mm$\cdot \,\,\text{s}^{-1}$(13.5%) for a target moving with components of radial and tangential motion relative to the array; estimated trajectory angle RMSEs of 10.42° and 5.11° were achieved for each experiment.
Institution: Michigan State University
Language: English
Subfield: Aerospace Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: green
Funder: Air Force Research Laboratory
Award: G5581703631
OpenAlex ID: W3103932269