Position location using broadcast digital television signals comprising pseudonoise sequences
View Patent ↗A user terminal comprises a receiver adapted to receive, at the user terminal, a broadcast digital television signal transmitted by a television transmitter and comprising a pseudo-noise code; and a controller adapted to generate a pseudorange based on the pseudo-noise code; wherein the location of the user terminal is determined based on the pseudorange and a location of the television transmitter.
1. A user terminal comprising:
a receiver adapted to receive, at the user terminal, a broadcast digital television signal transmitted by a television transmitter and comprising a pseudo-noise code; and
a controller adapted to generate a pseudorange based on the pseudo-noise code;
wherein the location of the user terminal is determined based on the pseudorange and a location of the television transmitter.
2. The user terminal of claim 1 , wherein the broadcast digital television signal is an American Television Standards Committee (ATSC) digital television signal.
3. The user terminal of claim 2 , wherein the pseudonoise code is a Global Positioning System L5 code.
4. The user terminal of claim 1 , further comprising:
a processor adapted to determine the location of the user terminal based on the pseudorange and the location of the identified television transmitter.
5. The user terminal of claim 1 , further comprising:
a time-gated delay-lock loop adapted to track the broadcast digital television signal.
6. A user terminal comprising:
a receiver adapted to receive, at the user terminal, a broadcast digital television signal transmitted by a television transmitter and comprising a pseudonoise code; and
a controller adapted to generate a pseudorange based on the broadcast digital television signal, and to identify the television transmitter based on the pseudonoise code;
wherein the location of the user terminal is determined based on the pseudorange and a location of the identified television transmitter.
7. The user terminal of claim 6 , wherein the broadcast digital television signal is an American Television Standards Committee (ATSC) digital television signal.
8. The user terminal of claim 7 :
wherein the controller generates the pseudorange based on a known digital sequence comprising at least one of
the pseudonoise code;
a Field Synchronization Segment within an ATSC data frame, and
a Synchronization Segment within a Data Segment within an ATSC data frame.
9. The user terminal of claim 7 , wherein the pseudonoise code is a Global Positioning System L5 code.
10. The user terminal of claim 6 , further comprising:
a processor adapted to determine the location of the user terminal based on the pseudorange and the location of the identified television transmitter.
11. The user terminal of claim 6 , further comprising:
a time-gated delay-lock loop adapted to track the broadcast digital television signal.
12. A user terminal comprising:
receiver means for receiving, at the user terminal, a broadcast digital television signal transmitted by a television transmitter and comprising a pseudo-noise code; and
controller means for generating a pseudorange based on the pseudo-noise code;
wherein the location of the user terminal is determined based on the pseudorange and a location of the television transmitter.
13. The user terminal of claim 12 , wherein the broadcast digital television signal is an American Television Standards Committee (ATSC) digital television signal.
14. The user terminal of claim 13 , wherein the pseudonoise code is a Global Positioning System L5 code.
15. The user terminal of claim 12 , further comprising:
processor means for determining the location of the user terminal based on the pseudorange and the location of the identified television transmitter.
16. A user terminal comprising:
receiver means for receiving, at the user terminal, a broadcast digital television signal transmitted by a television transmitter and comprising a pseudonoise code; and
controller means for generating a pseudorange based on the broadcast digital television signal, and to identify the television transmitter based on the pseudonoise code;
wherein the location of the user terminal is determined based on the pseudorange and a location of the identified television transmitter.
17. The user terminal of claim 16 , wherein the broadcast digital television signal is an American Television Standards Committee (ATSC) digital television signal.
18. The user terminal of claim 17 :
wherein the controller means generates the pseudorange based on a known digital sequence comprising at least one of
the pseudonoise code;
a Field Synchronization Segment within an ATSC data frame, and
a Synchronization Segment within a Data Segment within an ATSC data frame.
19. The user terminal of claim 17 , wherein the pseudonoise code is a Global Positioning System L5 code.
20. The user terminal of claim 16 , further comprising:
processor means for determining the location of the user terminal based on the pseudorange and the location of the identified television transmitter.
21. A method comprising:
receiving, at a user terminal, a broadcast digital television signal transmitted by a television transmitter and comprising a pseudo-noise code; and
generating a pseudorange based on the pseudo-noise code;
wherein the location of the user terminal is determined based on the pseudorange and a location of the television transmitter.
22. The method of claim 21 , wherein the broadcast digital television signal is an American Television Standards Committee (ATSC) digital television signal.
23. The method of claim 22 , wherein the pseudonoise code is a Global Positioning System L5 code.
24. The method of claim 21 , further comprising:
determining the location of the user terminal based on the pseudorange and the location of the identified television transmitter.
25. A method comprising:
receiving, at a user terminal, a broadcast digital television signal transmitted by a television transmitter and comprising a pseudonoise code;
generating a pseudorange based on the broadcast digital television signal; and
identifying the television transmitter based on the pseudonoise code;
wherein the location of the user terminal is determined based on the pseudorange and a location of the identified television transmitter.
26. The method of claim 25 , wherein the broadcast digital television signal is an American Television Standards Committee (ATSC) digital television signal.
27. The method of claim 26 :
wherein the pseudorange is generated based on a known digital sequence comprising at least one of
the pseudonoise code;
a Field Synchronization Segment within an ATSC data frame, and
a Synchronization Segment within a Data Segment within an ATSC data frame.
28. The method of claim 26 , wherein the pseudonoise code is a Global Positioning System L5 code.
29. The method of claim 25 , further comprising:
determining the location of the user terminal based on the pseudorange and the location of the identified television transmitter.
30. Computer-readable media embodying instructions executable by a computer to perform a method comprising:
receiving, at a user terminal, a broadcast digital television signal transmitted by a television transmitter and comprising a pseudo-noise code; and
generating a pseudorange based on the pseudo-noise code;
wherein the location of the user terminal is determined based on the pseudorange and a location of the television transmitter.
31. The media of claim 30 , wherein the broadcast digital television signal is an American Television Standards Committee (ATSC) digital television signal.
32. The media of claim 31 , wherein the pseudonoise code is a Global Positioning System L5 code.
33. The media of claim 30 , wherein the method further comprises:
determining the location of the user terminal based on the pseudorange and the location of the identified television transmitter.
34. Computer-readable media embodying instructions executable by a computer to perform a method comprising:
receiving, at a user terminal, a broadcast digital television signal transmitted by a television transmitter and comprising a pseudonoise code;
generating a pseudorange based on the broadcast digital television signal;
identifying the television transmitter based on the pseudonoise code;
wherein the location of the user terminal is determined based on the pseudorange and a location of the identified television transmitter.
35. The media of claim 34 , wherein the broadcast digital television signal is an American Television Standards Committee (ATSC) digital television signal.
36. The media of claim 35 :
wherein the pseudorange is generated based on a known digital sequence comprising at least one of
the pseudonoise code;
a Field Synchronization Segment within an ATSC data frame, and
a Synchronization Segment within a Data Segment within an ATSC data frame.
37. The media of claim 35 , wherein the pseudonoise code is a Global Positioning System L5 code.
38. The media of claim 34 , wherein the method further comprises:
determining the location of the user terminal based on the pseudorange and the location of the identified television transmitter.