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access icon free Contribution of auxiliary coherent radar receiver to target's velocity estimation

© The Institution of Engineering and Technology
Received 02/07/2017, Accepted 04/11/2017, Revised 02/11/2017, Published 06/11/2017

Recent progress in bistatic radar techniques can be used to improve performances of classical monostatic radar. A prominent limitation of coherent radar is its inability to measure the complete velocity vector (magnitude and direction) of a detected target. A single coherent detection can provide range-rate only. At least two detections, separated in time, are needed to estimate the target's velocity vector. This study discusses how the velocity vector can be determined by two simultaneous detections spaced in distance. The second detection is obtained by an auxiliary distant bistatic coherent receiver; an approach proposed in the 1990s to enhance meteorological radar. Being a very simple case of a distributed radar system allows for a simple demonstration of how to calculate the target's position and velocity vector and how to analyse the estimation accuracy, including geometric dilution of precision plots of the velocity error. Also discussed are two methods to identify correct data association when more than one target is detected.

Inspec keywords: radar receivers; object detection; radar signal processing; radar detection; velocity measurement; sensor fusion

Other keywords: auxiliary coherent radar receiver; velocity error; complete velocity vector measurement; auxiliary distant bistatic coherent receiver; single coherent detection; target velocity vector estimation; precision plots geometric dilution; distributed radar system; bistatic radar techniques; correct data association

Subjects: Radar equipment, systems and applications; Signal detection; Velocity, acceleration and rotation measurement

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