POSITION DETERMINATION BASED ON PROPAGATION DELAY DIFFERENCES OF MULTIPLE SIGNALS RECEIVED AT MULTIPLE SENSORS
First Claim
1. A method, comprising:
- receiving first and second signals from corresponding first and second transmitters, at each of first and second sensors; and
determining at least two-dimensional coordinates from a phase difference of arrival of the first signal at the first and second sensors, a phase difference of arrival of the second signal at the first and second sensors, a distance between the first and second transmitters, and a distance between the first and second sensors;
wherein the determining is performed within one or more of circuitry and a suitably programmed computer system.
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Accused Products
Abstract
Methods and systems to determine at multi-dimensional coordinates of an object based on propagation delay differences of multiple signals received from the object by each of a plurality of sensors. The signals may include optical signals in a human visible spectrum, which may be amplitude modulated with corresponding frequency tones. An envelope may be detected with respect to each of the sensors, and signals within each envelope may be separated. A phase difference of arrival may be determined for each of the signals, based on a difference in propagation delay times of the signal with respect to multiple sensors. The phase differences of arrival may be converted to corresponding distance differences between a corresponding transmitter and the corresponding sensors. A linear distance and a perpendicular offset distance may be determined from a combination the distance differences, a distance between the corresponding transmitters, and a distance between the corresponding sensors.
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Citations
20 Claims
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1. A method, comprising:
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receiving first and second signals from corresponding first and second transmitters, at each of first and second sensors; and determining at least two-dimensional coordinates from a phase difference of arrival of the first signal at the first and second sensors, a phase difference of arrival of the second signal at the first and second sensors, a distance between the first and second transmitters, and a distance between the first and second sensors; wherein the determining is performed within one or more of circuitry and a suitably programmed computer system. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A system, comprising:
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first and second sensors, each to receive a first signal from a first transmitter and a second signal from a second transmitter; and a computation system to determine at least two-dimensional coordinates from a phase difference of arrival of the first signal at the first and second sensors, a phase difference of arrival of the second signal at the first and second sensors, a distance between the first and second transmitters, and a distance between the first and second sensors. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A computer program product including a computer readable medium having computer program logic stored therein, the computer program logic comprising:
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receive logic to cause a processor to receive information corresponding to first and second signals received at each of first and second sensors from corresponding first and second transmitters; and computation logic to cause the processor to determine at least two-dimensional coordinates from a phase difference of arrival of the first signal at the first and second sensors, a phase difference of arrival of the second signal at the first and second sensors, a distance between the first and second transmitters, and a distance between the first and second sensors. - View Dependent Claims (18, 19, 20)
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Specification