Monitor units for television signals
View Patent ↗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.
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.
2. The apparatus of claim 1 , wherein the wireless television signal comprises at least one of:
an American Television Standards Committee (ATSC) digital television (DTV) signal;
a Digital Video Broadcasting (DVB) signal;
an Integrated Services Digital Broadcasting-Terrestrial (ISDB-T) signal; and
a National Television System Committee (NTSC) analog television signal.
3. The apparatus of claim 1 , further comprising:
a processor to determine the location of the user terminal.
4. The apparatus of claim 1 , further comprising:
a satellite receiver to receive a satellite positioning signal;
a processor to determine the location of the receiver based on the satellite positioning signal; and
a time transfer unit to adjust the reference clock based on the satellite positioning signal.
5. The apparatus of claim 4 :
wherein the satellite positioning signal comprises a global positioning system (GPS) signal.
6. An apparatus comprising:
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.
7. The apparatus of claim 6 , wherein the wireless television signal comprises at least one of:
an American Television Standards Committee (ATSC) digital television (DTV) signal;
a Digital Video Broadcasting (DVB) signal;
an Integrated Services Digital Broadcasting-Terrestrial (ISDB-T) signal; and
a National Television System Committee (NTSC) analog television signal.
8. The apparatus of claim 6 , further comprising:
means for determining the location of the user terminal.
9. The apparatus of claim 6 , further comprising:
means for receiving a satellite positioning signal;
means for determining the location of the receiver based on the satellite positioning signal; and
means for adjusting the reference clock signal based on the satellite positioning signal.
10. The apparatus of claim 9 :
wherein the satellite positioning signal comprises a global positioning system (GPS) signal.
11. A method comprising:
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.
12. The method of claim 11 , wherein the wireless television signal comprises at least one of:
an American Television Standards Committee (ATSC) digital television (DTV) signal;
a Digital Video Broadcasting (DVB) signal;
an Integrated Services Digital Broadcasting-Terrestrial (ISDB-T) signal; and
a National Television System Committee (NTSC) analog television signal.
13. The method of claim 11 , further comprising:
determining the location of the user terminal.
14. The method of claim 11 , further comprising:
receiving a satellite positioning signal;
determining the location of the receiver based on the satellite positioning signal; and
adjusting the reference clock signal based on the satellite positioning signal.
15. The method of claim 14 :
wherein the satellite positioning signal comprises a global positioning system (GPS) signal.