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Distance and velocity measurements using carrier signals

  • US 9,271,258 B2
  • Filed: 06/02/2014
  • Issued: 02/23/2016
  • Est. Priority Date: 06/02/2014
  • Status: Expired due to Fees
First Claim
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1. A measurement method, the method comprising:

  • transmitting a first signal from an originator device to a transponder device, the first signal having a first carrier frequency;

    determining a carrier phase of the first signal at the transponder device;

    transmitting a second signal from the transponder device to the originator device, the second signal having a second carrier frequency;

    determining a carrier phase of the second signal at the originator device; and

    estimating a distance between the originator device and the transponder device using the carrier phase of the first carrier signal and the carrier phase of the second carrier signal,wherein estimating the distance between the originator device and the transponder device further comprises calculating a wavelength ambiguity factor and using the wavelength ambiguity factor to estimate the distance.

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