Timing estimation method and apparatus for a location system
First Claim
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1. A timing estimation method used in a location system comprising the steps of:
- detecting at a second device a first signal and a second signal, the first and second signals are transmitted by a first device according to a timing pattern;
measuring arrival times for the first and second signals; and
based on the timing pattern and the measured arrival times of the first and second signals, deriving at least one parameter that characterizes an arrival time of a third signal.
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Abstract
A first signal and a second signal are detected. The first and second signals are transmitted according to a timing pattern. An arrival time is identified for the first and second signals. Based on the timing pattern and the estimated arrival times of the first and second signals, a set of parameters is derived that characterize a timing relationship between a first device (100) and a second device (200).
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Citations
20 Claims
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1. A timing estimation method used in a location system comprising the steps of:
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detecting at a second device a first signal and a second signal, the first and second signals are transmitted by a first device according to a timing pattern;
measuring arrival times for the first and second signals; and
based on the timing pattern and the measured arrival times of the first and second signals, deriving at least one parameter that characterizes an arrival time of a third signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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- 17. A first device for use in a location system adapted to receive a first signal and a second signal from a second device according to a timing pattern, to measure arrival times for the first and second signals, and based on the timing pattern and the measured arrival times of the first and second signals, to derive at least one parameter that characterizes an arrival time of a third signal.
- 19. A first device for use in a location system adapted to derive at least one parameter that characterizes an arrival time of a third signal based on a timing pattern according to which a first signal and a second signal are transmitted by a second device, and based on measured arrival times of the first signal and the second signal detected at a third device.
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Current AssigneeMotorola Solutions, Inc.
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Original AssigneeMotorola, Inc. (Motorola Solutions, Inc.)
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InventorsPage, Christopher, Johnson, Mark J.
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Primary Examiner(s)Issing, Gregory C.
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Application NumberUS09/891,594Publication NumberTime in Patent Office750 DaysField of Search342/388, 342/387, 342/461, 342/458, 342/465US Class Current342/387CPC Class CodesG01S 5/06 Position of source determin...
