Distance/ranging determination using relative phase data
First Claim
Patent Images
1. A method of determining distance between a signal source and a multi-channel signal receiver, the method comprising:
- obtaining successive readings on each of a plurality of different channels of the multi-channel receiver of a signal transmitted from the signal source;
measuring phase information from the readings of the plurality of different channels on the successive readings to generate measured phase information; and
determining a relationship between the receiver and the signal source by using the measured phase information, the relationship comprising actual distance between the signal source and the multi-channel receiver.
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Abstract
A method and system for locating an RF transponder based on phase differences between signals received from the RF transponder. The method includes receiving a signal from the transponder and calculating distance, relative movement, and position by comparing I-Q phase angle vectors of the signals. Global scroll commands can be used following receipt of signals at first and second frequencies to quickly determine distance.
106 Citations
26 Claims
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1. A method of determining distance between a signal source and a multi-channel signal receiver, the method comprising:
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obtaining successive readings on each of a plurality of different channels of the multi-channel receiver of a signal transmitted from the signal source; measuring phase information from the readings of the plurality of different channels on the successive readings to generate measured phase information; and determining a relationship between the receiver and the signal source by using the measured phase information, the relationship comprising actual distance between the signal source and the multi-channel receiver. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A radio frequency communication system comprising:
a multi-channel receiver configured to receive a signal transmitted from a signal source, the receiver configured to determine a relationship between the multi-channel receiver and the signal source by using measured phase information relative between each of multiple different channels of the multi-channel receiver taken with two or more successive readings of the signal on each of the multiple different channels of the multi-channel receiver, the relationship comprising actual distance. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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19. A method of determining distance between a radio frequency signal source and a multi-channel receiver, comprising:
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receiving at the multi-channel receiver a radio frequency signal transmitted from the signal source; determining a change in phase angle relationship between a base band in-phase signal measured at a first channel of the multi-channel receiver and a quadrature signal measured at a second channel of the multi-channel receiver, each measurement obtained from the received radio frequency signal on each of the first and second channels of the multi-channel receiver; and calculating a distance between the signal source and the receiver in response to the determined change in phase angle relationship. - View Dependent Claims (20, 21, 22)
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23. A method of determining a positional relationship between a radio frequency signal source and a multi-channel receiver, comprising:
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receiving at the multi-channel receiver a first signal from the signal source that is at a first frequency; issuing a first global scroll command to obtain a first I-Q signal vector; receiving at the multi-channel receiver a second signal from the signal source that is at a second frequency; issuing a second global scroll command to obtain a second I-Q signal vector; and comparing the first and second I-Q vectors and calculating the positional relationship distance between the signal source and the multi-channel receiver. - View Dependent Claims (24)
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25. A system, comprising:
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a variable frequency signal source that produces a first signal at a first frequency and a second signal at a second frequency; a multi-channel receiver for receiving the first and second signals and for determining a positional relationship between the signal source and the multi-channel receiver, the multi-channel receiver comprising means for comparing a change in vectors of I-Q phases obtained from two or more different channels of the multi-channel receiver of the first and second signals. - View Dependent Claims (26)
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Specification