Transmitter Identification For Wireless Signals Having A Digital Audio Broadcast Physical Layer

• US 20090175379A1
• Filed: 12/12/2008
• Published: 07/09/2009
• Est. Priority Date: 12/12/2007
• Status: Abandoned Application

• Current Assignee: TruePosition Incorporated
• Original Assignee: Rosum Corporation (Liberty Broadband Corp.)
• Inventors: Opshaug, Guttorm, Rubin, Dimitri, Burgess, David, Samra, Harvind
• Application Number:
  US12/333,445
• Publication Number:
  US 20090175379A1
• Time in Patent Office: Days
• US Class Current: 375/295
• CPC Class Codes: G01S 19/09 providing processing capability normally carried out by the receiver
• CPC Class Codes: G01S 19/12 wherein the cooperating elements are telecommunication base stations
• CPC Class Codes: G01S 19/46 the supplementary measurement being of a radio-wave signal type
• CPC Class Codes: G01S 5/0236 Assistance data, e.g. base station almanac
• CPC Class Codes: G01S 5/145 Using a supplementary range measurement, e.g. based on pseudo-range measurements
• CPC Class Codes: H04H 60/44 for identifying broadcast stations
• CPC Class Codes: H04H 60/51 of receiving stations

Abstract

According to one embodiment, an apparatus having corresponding computer-readable media comprises: a transmitter marking module adapted to insert a pseudonoise sequence into a Null symbol of a digital audio broadcast (DAB) transmission frame; wherein the pseudonoise sequence represents an identity of a transmitter adapted to transmit a wireless signal representing the DAB transmission frame. According to another embodiment, an apparatus having corresponding computer-readable media comprises: a transmitter identification module adapted to identify a transmitter of a wireless signal representing a digital audio broadcast (DAB) transmission frame based on a pseudonoise sequence present in a Null symbol of the DAB transmission frame.

Claims

1. An apparatus comprising:

a transmitter marking module adapted to insert a pseudonoise sequence into a Null symbol of a digital audio broadcast (DAB) transmission frame;

wherein the pseudonoise sequence represents an identity of a transmitter adapted to transmit a wireless signal representing the DAB transmission frame.

2. The apparatus of claim 1:

wherein the pseudonoise sequence is selected from a group of mutually orthogonal pseudonoise sequences.

3. The apparatus of claim 1, wherein the transmitter marking module comprises:

a pseudonoise sequence generator adapted to provide the pseudonoise sequence; and

an insertion module adapted to insert the pseudonoise sequence into the Null symbol of the DAB transmission frame.

4. The apparatus of claim 3, wherein the transmitter marking module further comprises:

a chip rotator adapted to rotate the pseudonoise sequence by a predetermined number of chips before the pseudonoise sequence is inserted into the Null symbol of the DAB transmission frame;

wherein the pseudonoise sequence and the predetermined number of chips represent the identity of the transmitter.

5. The apparatus of claim 3, wherein the transmitter marking module further comprises:

a transmitter identification information module to insert Transmitter Identification Information (TII) into the Null symbol of the DAB transmission frame.

6. The apparatus of claim 3, further comprising:

a DAB module adapted to provide the DAB transmission frame.

7. The apparatus of claim 6, further comprising:

the transmitter.

8. The apparatus of claim 1:

wherein the wireless signal is a Terrestrial-Digital Multimedia Broadcasting (T-DMB) signal.

9. Computer-readable media embodying instructions executable by a computer to perform a method comprising:

inserting a pseudonoise sequence into a Null symbol of a digital audio broadcast (DAB) transmission frame;

wherein the pseudonoise sequence represents an identity of a transmitter adapted to transmit a wireless signal representing the DAB transmission frame.

10. The computer-readable media of claim 9:

wherein the pseudonoise sequence is selected from a group of mutually orthogonal pseudonoise sequences.

11. The computer-readable media of claim 9, wherein the method further comprises:

rotating the pseudonoise sequence by a predetermined number of chips before the pseudonoise sequence is inserted into the Null symbol of the DAB transmission frame;

wherein the pseudonoise sequence and the predetermined number of chips represent the identity of the transmitter.

12. The computer-readable media of claim 9, wherein the method further comprises:

inserting Transmitter Identification Information (TII) into the Null symbol of the DAB transmission frame.

13. The computer-readable media of claim 9:

wherein the wireless signal is a Terrestrial-Digital Multimedia Broadcasting (T-DMB) signal.

14. An apparatus comprising:

a transmitter identification module adapted to identify a transmitter of a wireless signal representing a digital audio broadcast (DAB) transmission frame based on a pseudonoise sequence present in a Null symbol of the DAB transmission frame.

15. The apparatus of claim 14, wherein the transmitter identification module comprises:

a correlator adapted to identify the transmitter based on the pseudonoise sequence and a chip rotation of the pseudonoise sequence.

16. The apparatus of claim 14:

wherein the pseudonoise sequence is selected from a group of mutually orthogonal pseudonoise sequences.

17. The apparatus of claim 14, wherein the transmitter identification module comprises:

a transmitter identification information module to obtain Transmitter Identification Information (TII) from the Null symbol of the DAB transmission frame;

wherein the transmitter identification module is further adapted to identify the transmitter of the wireless signal representing the DAB transmission frame based on the Transmitter Identification Information.

18. The apparatus of claim 14, further comprising:

a receiver adapted to receive the wireless signal representing the DAB transmission frame.

19. The apparatus of claim 14, further comprising:

a pseudorange module adapted to obtain a pseudorange based on the pseudonoise sequence.

20. The apparatus of claim 19, further comprising:

a position module adapted to determine a position of the apparatus based on the pseudorange.

21. The apparatus of claim 14:

wherein the wireless signal is a Terrestrial-Digital Multimedia Broadcasting (T-DMB) signal.

22. Computer-readable media embodying instructions executable by a computer to perform a method comprising:

identifying a transmitter of a wireless signal representing a digital audio broadcast (DAB) transmission frame based on a pseudonoise sequence present in a Null symbol of the DAB transmission frame.

23. The computer-readable media of claim 22, wherein the method further comprises:

identifying the transmitter based on the pseudonoise sequence and a chip rotation of the pseudonoise sequence.

24. The computer-readable media of claim 22:

wherein the pseudonoise sequence is selected from a group of mutually orthogonal pseudonoise sequences.

25. The computer-readable media of claim 22, wherein the method further comprises:

obtaining Transmitter Identification Information (TII) from the Null symbol of the DAB transmission frame; and

identifying the transmitter of the wireless signal representing the DAB transmission frame based on the Transmitter Identification Information.

26. The computer-readable media of claim 22, wherein the method further comprises:

obtaining a pseudorange based on the pseudonoise sequence.

27. The computer-readable media of claim 26, wherein the method further comprises:

determining a position of a receiver of the wireless signal based on the pseudorange.

28. The computer-readable media of claim 22:

wherein the wireless signal is a Terrestrial-Digital Multimedia Broadcasting (T-DMB) signal.