Monitor units for television signals
First Claim
Patent Images
1. An apparatus comprising:
- a reference clock;
a receiver to receive a wireless television signal, wherein the wireless television signal is transmitted by a television transmitter according to a transmitter clock; and
a clock offset unit to determine a clock offset between the reference clock and the transmitter clock based on the wireless television signal;
wherein a location of a user terminal is determined based on the clock offset, a pseudorange determined between the user terminal and the television transmitter based on the wireless television signal, and a location of the television transmitter.
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Accused Products
Abstract
Apparatus having corresponding methods comprises a reference clock; a receiver to receive a wireless television signal, wherein the wireless television signal is transmitted by a television transmitter according to a transmitter clock; and a clock offset unit to determine a clock offset between the reference clock and the transmitter clock based on the wireless television signal.
105 Citations
15 Claims
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1. An apparatus comprising:
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a reference clock; a receiver to receive a wireless television signal, wherein the wireless television signal is transmitted by a television transmitter according to a transmitter clock; and a clock offset unit to determine a clock offset between the reference clock and the transmitter clock based on the wireless television signal; wherein a location of a user terminal is determined based on the clock offset, a pseudorange determined between the user terminal and the television transmitter based on the wireless television signal, and a location of the television transmitter. - View Dependent Claims (2, 3, 4, 5)
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6. An apparatus comprising:
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means for generating a reference clock signal; means for receiving a wireless television signal, wherein the wireless television signal is transmitted by a television transmitter according to a transmitter clock; and means for determining a clock offset between the reference clock signal and the transmitter clock based on the wireless television signal; wherein a location of a user terminal is determined based on the clock offset, a pseudorange determined between the user terminal and the television transmitter based on the wireless television signal, and a location of the television transmitter. - View Dependent Claims (7, 8, 9, 10)
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11. A method comprising:
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generating a reference clock signal; receiving a wireless television signal, wherein the wireless television signal is transmitted by a television transmitter according to a transmitter clock; and determining a clock offset between the reference clock signal and the transmitter clock based on the wireless television signal; wherein a location of a user terminal is determined based on the clock offset, a pseudorange determined between the user terminal and the television transmitter based on the wireless television signal, and a location of the television transmitter. - View Dependent Claims (12, 13, 14, 15)
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Specification
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- Resources
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Current AssigneeTruePosition Incorporated
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Original AssigneeRosum Corporation (Liberty Broadband Corp.)
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InventorsRabinowitz, Matthew, Spilker, Jr., James J., Do, Ju-Yong, Lee, Andy, Omura, Jim
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Primary Examiner(s)PHAN, DAO LINDA
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Application NumberUS11/552,231Publication NumberTime in Patent Office798 DaysField of Search342/457, 342463-465, 348/473, 348/476, 348/477US Class Current342/463CPC Class CodesG01S 5/0036 of measured values, i.e. me...G01S 5/0054 of actual mobile position, ...G01S 5/0081 Transmission between base s...G01S 5/021 Calibration, monitoring or ...G01S 5/0221 ReceiversG01S 5/14 Determining absolute distan...G01S 5/145 Using a supplementary range...
