Back to results
US 7,466,266 B2Granted
Psuedo television transmitters for position location
AssigneeRosum Corporation
InventorGuttorm Opshaug
Life of this patent
Estimating the term…
Abstract
An apparatus having corresponding methods comprises a signal generator to generate an radio-frequency (RF) signal comprising a ranging signal comprising a component of a television signal; a wireless transmitter to wirelessly transmit the RF signal; and a self-check unit comprising a receiver to receive the RF signal, and to recover the ranging signal from the RF signal, a pseudorange circuit to determine a pseudorange based on the ranging signal, and a self-test circuit to generate a self-test output based on the pseudorange.
Claims36
An apparatus comprising:
- a signal generator to generate an radio-frequency (RF) signal comprising a ranging signal comprising a component of a television signal;
- a wireless transmitter to wirelessly transmit the RF signal;
- and
- a self-check unit comprising
- a receiver to receive the RF signal, and to recover the ranging signal from the RF signal,
- a pseudorange circuit to determine a pseudorange based on the ranging signal, and
- a self-test circuit to generate a self-test output based on the pseudorange;
- wherein the self-test circuit comprises
- a wireless receiver to wirelessly receive a second RF signal comprising a second ranging signal comprising a component of a television signal, and to recover the second ranging signal from the second RF signal, and
- a second pseudorange circuit to determine a second pseudorange based on the second ranging signal,
- wherein a station comprising a transmitter of the second RF signal generates a third pseudorange based on the ranging signal and a fourth pseudorange based on the second ranging signal,
- wherein a range between the station and the apparatus is determined based on the pseudoranges.
9 more elements
An apparatus comprising:
- a signal generator to generate an radio-frequency (RF) signal comprising a ranging signal comprising a component of a television signal;
- a wireless transmitter to wirelessly transmit the RF signal;
- a self-check unit comprising
- a receiver to receive the RF signal, and to recover the ranging signal from the RF signal,
- a pseudorange circuit to determine a pseudorange based on the ranging signal, and
- a self-test circuit to generate a self-test output based on the pseudorange;
- and
- a first clock, wherein the ranging signals are generated according to the first clock;
- wherein the self-test circuit comprises
- a wireless receiver to wirelessly receive a second RF signal comprising a second ranging signal comprising a component of a television signal, wherein the second ranging signal is generated according to a second clock, and to recover the second ranging signal from the second RF signal, and
- a second pseudorange circuit to determine a second pseudorange based on the second ranging signal,
- wherein a station comprising a transmitter of the second RF signal generates a third pseudorange based on the ranging signal and a fourth pseudorange based on the second ranging signal, and
- wherein a clock bias between the first and second clocks is determined based on the pseudoranges.
10 more elements
An apparatus comprising:
- means for generating an radio-frequency (RF) signal comprising a ranging signal comprising a component of a television signal;
- means for wirelessly transmitting the RF signal;
- and
- means for self-checking comprising
- means for receiving the RF signal, and for recovering the ranging signal from the RF signal,
- means for determining a pseudorange based on the ranging signal, and
- means for generating a self-test output based on the pseudorange;
- wherein the means for generating a self-test output comprises
- means for wirelessly receiving a second RF signal comprising a second ranging signal comprising a component of a television signal, and for recovering the second ranging signal from the second RF signal, and
- means for determining a second pseudorange based on the second ranging signal,
- wherein a station comprising a transmitter of the second RF signal generates a third pseudorange based on the ranging signal and a fourth pseudorange based on the second ranging signal,
- wherein a range between the station and the apparatus is determined based on the pseudoranges.
9 more elements
An apparatus comprising:
- means for generating an radio-frequency (RF) signal comprising a ranging signal comprising a component of a television signal;
- means for wirelessly transmitting the RF signal;
- means for self-checking comprising
- means for receiving the RF signal, and for recovering the ranging signal from the RF signal,
- means for determining a pseudorange based on the ranging signal, and
- means for generating a self-test output based on the pseudorange;
- and
- first means for clocking, wherein the ranging signals are generated according to the first means for clocking;
- wherein the means for generating a self-test output comprises
- means for wirelessly receiving a second RF signal comprising a second ranging signal comprising a component of a television signal, wherein the second ranging signal is generated according to a second clock, and to recover the second ranging signal from the second RF signal, and
- means for determining a second pseudorange based on the second ranging signal,
- wherein a station comprising a transmitter of the second RF signal generates a third pseudorange based on the ranging signal and a fourth pseudorange based on the second ranging signal, and
- wherein a clock bias between the first means for clocking and the second clock is determined based on the pseudoranges.
10 more elements
A method comprising:
- generating an radio-frequency (RF) signal comprising a ranging signal comprising a component of a television signal;
- wirelessly transmitting the RF signal;
- and
- self-checking comprising
- receiving the RF signal,
- recovering the ranging signal from the RF signal,
- determining a pseudorange based on the ranging signal, and
- generating a self-test output based on the pseudorange;
- wherein generating a self-test output comprises
- wirelessly receiving a second RF signal comprising a second ranging signal comprising a component of a television signal,
- recovering the second ranging signal from the second RF signal, and
- determining a second pseudorange based on the second ranging signal,
- wherein a station comprising a transmitter of the second RF signal generates a third pseudorange based on the ranging signal and a fourth pseudorange based on the second ranging signal,
- wherein a range from the station is determined based on the pseudoranges.
11 more elements
A method comprising:
- generating an radio-frequency (RF) signal comprising a ranging signal comprising a component of a television signal;
- wirelessly transmitting the RF signal;
- self-checking comprising
- receiving the RF signal,
- recovering the ranging signal from the RF signal,
- determining a pseudorange based on the ranging signal, and
- generating a self-test output based on the pseudorange;
- and
- generating the ranging signals according to a first clock;
- wherein generating a self-test output comprises
- wirelessly receiving a second RF signal comprising a second ranging signal comprising a component of a television signal, wherein the second ranging signal is generated according to a second clock,
- recovering the second ranging signal from the second RF signal, and
- determining a second pseudorange based on the second ranging signal,
- wherein a station comprising a transmitter of the second RF signal generates a third pseudorange based on the ranging signal and a fourth pseudorange based on the second ranging signal, and
- wherein a clock bias between the first and second clocks is determined based on the pseudoranges.
12 more elements
Dependencies are inferred from the claim text.