Signal acquisition apparatus and method
View Patent ↗A receiver comprises a first signal acquisition unit for acquiring a first type of signal block formatted according to a first format, wherein the first type of signal block is interleaved with a second type of signal block formatted according to a second format. The first signal acquisition unit includes one or more parameter estimation units for estimating, from received signals of the first type, one or more signal parameters related to acquisition of the first type of signal block at a respective frequency; memory to store data relating to the or each estimated parameter for the respective frequency; and a controller configured to initialize parameter estimation for subsequent received signals on a revisited frequency based upon data stored for that respective frequency.
1. A receiver, comprising:
first signal acquisition circuitry configured to acquire a first type of signal block formatted according to a first format, wherein the first type of signal block is interleaved with a second type of signal block formatted according to a second format, the first signal acquisition circuitry including:
parameter estimation circuitry configured to estimate, from received signals of the first type, one or more signal parameters associated with acquisition of the first type of signal block at a frequency;
memory to store data relating to each said estimated one or more signal parameters associated with acquisition of the first type of signal block for said frequency; and
control circuitry configured to initialize signal parameter estimation for subsequent received signals at a revisited frequency based on the stored data relating to each said estimated one or more signal parameters associated with acquisition of the first type of signal block for said frequency, the revisited frequency being the same as said frequency.
2. The receiver according to claim 1 , wherein the first format is a terrestrial digital video broadcast format, and the second format is a mobile digital video broadcast format.
3. The receiver according to claim 2 , wherein the terrestrial digital video broadcast format is DVB-T2, and the mobile digital video broadcast format is DVB-NGH.
4. The receiver according to claim 1 , wherein the first format is a mobile digital video broadcast format, and the second format is a terrestrial digital video broadcast format.
5. The receiver according to claim 4 , wherein the terrestrial digital video broadcast format is DVB-T2, and the mobile digital video broadcast format is DVB-NGH.
6. The receiver according to claim 1 , wherein the data relating to each said estimated one or more parameters includes data relating to a state of one or more processes of the receiver.
7. The receiver according to claim 1 , wherein the data stored for said frequency for a signal of a first type is used to initialize an estimate of one or more signal parameters for said frequency for a signal of the second type.
8. The receiver according to claim 1 , wherein the receiver is configured to receive the interleaved signals of both the first and second types from successive ones of a plurality of frequencies, including said frequency, in a time-frequency slicing scheme.
9. The receiver according to claim 1 , wherein the receiver is configured to extract from the signal block of the first type a sub-block of data corresponding to a respective service.
10. A method of receiving a first type of signal formatted according to a first format, wherein the first type of signal block is interleaved with a second type of signal block formatted according to a second format, the method comprising:
estimating, from received signals of the first type, one or more signal parameters associated with acquisition of the first type of signal block at a frequency;
storing, in memory, data relating to each said estimated one or more signal parameters associated with acquisition of the first type of signal block for said frequency; and
initializing signal parameter estimation for subsequent received signals at a revisited frequency based on the stored data relating to each said estimated one or more signal parameters associated with acquisition of the first type of signal block for said frequency, the revisited frequency being the same as said frequency.
11. The method according to claim 10 , wherein the data relating to each said estimated one or more parameters includes data relating to a state of one or more processes of a receiver.
12. The method according to claim 10 , further comprising:
initializing an estimate of one or more signal parameters for a respective frequency for a signal of the second type using the data stored for said frequency for a signal of the first type.
13. The method according to claim 10 , further comprising:
receiving the interleaved signals of both the first and second types from successive ones of a plurality of frequencies, including said frequency.
14. The method according to claim 10 , further comprising:
extracting from the signal block of the first type a sub-block of data corresponding to a respective service.
15. The method according to claim 10 , wherein the stored data relates to one or more selected from the list consisting of:
power of the signal;
a frequency offset of the signal;
a timing offset of the signal; and
a noise profile of the signal.
16. A non-transitory computer-readable storage medium storing computer-readable instructions that, when executed by a computer, cause the computer to perform a method comprising:
estimating, from received signals of the first type, one or more signal parameters associated with acquisition of the first type of signal block at a frequency;
storing, in memory, data relating to each said estimated one or more signal parameters associated with acquisition of the first type of signal block for said frequency; and
initializing signal parameter estimation for subsequent received signals at a revisited frequency based on the stored data relating to each said estimated one or more signal parameters associated with acquisition of the first type of signal block for said frequency, the revisited frequency being the same as said frequency.
17. The receiver according to claim 1 , wherein the receiver is comprised of only one tuner.
18. The receiver according to claim 1 , wherein the receiver cannot fully decode the second type of signal block formatted according to the second format.
19. The receiver according to claim 1 , wherein the stored data relates to one or more of the following:
power of the first type of signal block,
a frequency offset of the first type of signal block,
a timing offset of the first type of signal block, and
a noise profile of the first type of signal block.
20. The receiver according to claim 1 , wherein the revisited frequency is a frequency immediately preceded by a different frequency associated with acquisition of the first type of signal block at the different frequency.