Ultra-wideband radar motion sensor
First Claim
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1. An ultra-wideband (UWB) radar motion sensor, comprising:
- a pulse repetition interval generator;
a fixed reference delay means connected to the pulse repetition interval generator;
a transmit pulse generator connected to the reference delay means;
a transmit antenna connected to the transmit pulse generator;
an adjustable delay means connected to the pulse repetition interval generator;
a gating pulse generator connected to the adjustable delay means;
an UWB radar receiver connected to the gating pulse generator;
a receiver antenna connected to the UWB receiver;
signal processing means connected to the UWB receiver.
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Abstract
A motion sensor is based on ultra-wideband (UWB) radar. UWB radar range is determined by a pulse-echo interval. For motion detection, the sensors operate by staring at a fixed range and then sensing any change in the averaged radar reflectivity at that range. A sampling gate is opened at a fixed delay after the emission of a transmit pulse. The resultant sampling gate output is averaged over repeated pulses. Changes in the averaged sampling gate output represent changes in the radar reflectivity at a particular range, and thus motion.
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Citations
20 Claims
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1. An ultra-wideband (UWB) radar motion sensor, comprising:
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a pulse repetition interval generator; a fixed reference delay means connected to the pulse repetition interval generator; a transmit pulse generator connected to the reference delay means; a transmit antenna connected to the transmit pulse generator; an adjustable delay means connected to the pulse repetition interval generator; a gating pulse generator connected to the adjustable delay means; an UWB radar receiver connected to the gating pulse generator; a receiver antenna connected to the UWB receiver; signal processing means connected to the UWB receiver. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification