Methods for determining a range rate of a backscatter transponder and readers implementing the methods are described. The reader transmits a continuous wave signal and receives a modulated reflected response signal from the transponder, mixes the modulated reflected response signal with the carrier frequency to produce a downconverted signal, bandpass filters the downconverted signal to pass a bandpass filtered signal containing at least the modulation frequency, applies a non-linear amplitude transfer function to produce a modulation-suppressed signal, and measures the frequency of the modulation-suppressed signal and determines the range rate from the measured frequency.
Methods and systems for determining a range rate for a backscatter transponder
2017-03-21
Patent
Electronic Resource
English
Trimode LADAR/RADAR Transponder Systems for Tracking Long Range Cooperative Targets
British Library Online Contents | 1996
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