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

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.