Systems and methods for a high-precision time of arrival ultra-wideband positioning system
First Claim
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1. A method for a time-of-arrival positioning system, the method comprising:
- receiving from a reference transmitter a localization message that includes precise time data indicating a time when the localization message was transmitted, the precise time data derived from an atomically accurate signal transmitted from an atomically accurate reference, wherein the localization message further includes position data that describes a location of the reference transmitter;
estimating a distance of a mobile unit that receives the localization message to the reference transmitter using a time-of-arrival calculation based on the precise time data and the position data from the localization message;
estimating a position of the mobile unit based on the distance of the mobile unit to the reference transmitter.
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Abstract
Systems and methods for a high-precision time of arrival ultra-wideband positioning system are provided. In one embodiment, a method for generating precision localizer messages for an ultra-wideband time-of-arrival positioning system is provided. The method comprises receiving a signal from an atomically accurate reference, generating a timing signal based on the atomically accurate reference signal, correcting a system time based on the timing signal when an error is detected, and transmitting an ultra-wideband signal having a localization message based on the system time.
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Citations
18 Claims
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1. A method for a time-of-arrival positioning system, the method comprising:
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receiving from a reference transmitter a localization message that includes precise time data indicating a time when the localization message was transmitted, the precise time data derived from an atomically accurate signal transmitted from an atomically accurate reference, wherein the localization message further includes position data that describes a location of the reference transmitter; estimating a distance of a mobile unit that receives the localization message to the reference transmitter using a time-of-arrival calculation based on the precise time data and the position data from the localization message; estimating a position of the mobile unit based on the distance of the mobile unit to the reference transmitter. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A positioning system, the system comprising:
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a plurality of reference transmitters each transmitting localization messages, wherein each localization message includes precise time data indicating a time when each localization message was transmitted; wherein each of the plurality of reference transmitters derive the precise time data from an atomically accurate signal transmitted from at least one atomically accurate reference; wherein each of the plurality of reference transmitters include position data for their respective location in the localization messages; and at least one mobile unit having a receiver for receiving the localization messages transmitted by the plurality of reference transmitters, wherein the at least one mobile unit calculates a distance between the at least one mobile unit and a first reference transmitter of the plurality of reference transmitters using a time-of-arrival calculation based on the receipt of a first localizer message. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14)
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15. A reference transmitting unit for a positioning system, the reference transmitting unit comprising:
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means for receiving a first timing signal from an atomically accurate reference; means for maintaining a system time based on the first timing signal; means for determining a position of the reference transmitting unit; means for transmitting a localization message that includes precise time data indicating a time when the localization message was transmitted, based on the means for maintaining a system time, wherein the means for transmitting a localization message further includes in the localization message position data that describes the position of the reference transmitting unit. - View Dependent Claims (16, 17, 18)
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Specification