System and method for distance and velocity estimation in phase-based ranging

A measuring system includes a first measuring device and a second measuring device. The measuring system is configured to, between the first measuring device and the second measuring device, determine a first phase shift at a first frequency, determine a second phase shift at a second frequency, and...

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Bibliographische Detailangaben
1. Verfasser:	Romme, Jac
Format:	Patent
Sprache:	eng
Schlagworte:	ANALOGOUS ARRANGEMENTS USING OTHER WAVES DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES MEASURING PHYSICS RADIO DIRECTION-FINDING RADIO NAVIGATION TESTING TRANSMISSION
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Beschreibung
Zusammenfassung:	A measuring system includes a first measuring device and a second measuring device. The measuring system is configured to, between the first measuring device and the second measuring device, determine a first phase shift at a first frequency, determine a second phase shift at a second frequency, and determine a third phase shift at a third frequency. The first measuring device includes a phase difference calculator configured to calculate a first phase difference between the first phase shift and the second phase shift, and a second phase difference between the second phase shift and the third phase shift. The first measuring device also includes a range/velocity calculator configured to determine a first biased distance estimate from the first phase difference, a second biased distance estimate from the second phase difference, and an unbiased distance and/or velocity from the first biased distance estimate and the second biased distance estimate.