Distance and velocity measurements using carrier signals
First Claim
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.
1 Assignment
0 Petitions
Accused Products
Abstract
Systems and methods for performing distance and velocity measurements, such as by using carrier signals, are disclosed. A measurement method may include transmitting a first signal from an originator device to a transponder device, the first signal having a first carrier frequency; and determining a carrier phase of the first signal at the transponder device. The method may include transmitting a second signal from the transponder device to the originator device, the second signal having a second carrier frequency; and determining a carrier phase of the second signal at the originator device. The method may include 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. The method may include estimating the distance between the originator device and the transponder device using a frequency difference between the first carrier frequency and the second carrier frequency.
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Citations
41 Claims
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1. A measurement method, the method comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A measurement system, comprising:
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an originator device including a first radio, the first radio being configured to transmit a first signal to a transponder device, the first signal having a first carrier frequency; the transponder device including a second radio, the second radio being configured to transmit a second signal to the originator device, the second signal having a second carrier frequency; the transponder device being configured to determine a carrier phase of the first signal at the transponder device; the originator device being configured to determine a carrier phase of the second signal at the originator device; and at least one processor configured to estimate a distance between the originator device and the transponder device using the carrier phase of the first signal at the transponder device and the carrier phase of the second signal at the originator device, acid a frequency difference between the first carrier frequency and the second carrier frequency, wherein the at least one processor is further configured to calculate a wavelength ambiguity factor and use the wavelength ambiguity factor to estimate the distance. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A method for determining a relative velocity between a plurality of objects, the method comprising:
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determining a rate of change of a first carrier phase at a transponder device, the first carrier phase corresponding to a first signal transmitted from an originator device to the transponder device; determining a rate of change of a second carrier phase at the originator device, the second carrier phase corresponding to a second signal transmitted from the transponder device to the originator device; determining a relative motion between the originator device and the transponder device based on the rate of change of the first carrier phase and the rate of change of the second carrier phase; and determining a frequency offset between the first signal and the second signal based on the rate of change of the second carrier phase and a carrier frequency of the second signal. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29, 30)
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31. A method for determining a relative velocity between a plurality of objects, the method comprising:
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determining a plurality of distances between an originator device and a transponder device at a plurality of times; and determining a relative motion between the originator device and the transponder device based on the plurality of distances, wherein determining the plurality of distances includes; determining a first transponder carrier phase at the transponder device, the first transponder carrier phase corresponding to a first measurement signal transmitted from the originator device to the transponder device, determining a first originator carrier phase at the originator device, the first originator carrier phase corresponding to a first response signal transmitted from the transponder device to the originator device in response to the first measurement signal, estimating a first distance between the originator device and the transponder device using the first transponder carrier phase and the first originator carrier phase, determining a second transponder carrier phase at the transponder device, the second transponder carrier phase corresponding to a second measurement signal transmitted from originator device to the transponder device, determining a second originator carrier phase at the originator device, the second originator carrier phase corresponding to a second response signal transmitted from the transponder device to the originator device in response to the second measurement signal, estimating a second distance between the originator device and the transponder device using the second transponder carrier phase and the second ode motor carrier phase at the originator device, and wherein determining the relative motion between transponder radio and the originator radio includes determining a relative velocity between the originator device and the transponder device using the first distance and the second distance. - View Dependent Claims (32, 33, 34, 35)
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36. A measurement method, the method comprising:
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determining a rate of change of a first carrier phase at a transponder device, the first carrier phase corresponding to a first signal transmitted from an originator device to the transponder device; determining a rate of change of a second carrier phase at the originator device, the second carrier phase corresponding to a second signal transmitted from the transponder device to the originator device; and determining a frequency offset between the first signal and the second signal based on the rate of change of the first carrier phase and the rate of change of the second carrier phase, wherein determining the frequency offset comprises determining a difference between the rate of change of the first carrier phase and the rate of change of the second carrier phase. - View Dependent Claims (37, 38, 39, 40, 41)
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Specification