Apparatus, systems, methods and computer products for providing a virtual enhanced training sequence

• US 7,822,139 B2
• Filed: 05/25/2006
• Issued: 10/26/2010
• Est. Priority Date: 03/02/2005
• Status: Expired due to Fees

• Current Assignee: Rohde & Schwarz GmbH & Company KG
• Original Assignee: Rohde & Schwarz GmbH & Company KG
• Inventors: Simon, Michael
• Primary Examiner(s): Payne; David C
• Assistant Examiner(s): Panwalkar; Vineeta S
• Application Number:
  US11/420,384
• Publication Number:
  US 20060244865A1
• Time in Patent Office: 1,615 Days
• Field of Search: 375/354, 375/256, 375259-261, 375/265, 375229-231, 714/699, 714/746, 714/786, 714/792, 714/752, 714/775, 714/776, 714/789, 455/3.01, 455/3.02, 370/464, 370/498, 370/503, 370/505
• US Class Current: 375/265
• CPC Class Codes: H03M 13/2732 Convolutional interleaver; Interleavers using shift-registers or delay lines like, e.g. Ramsey type interleaver
• CPC Class Codes: H03M 13/2936 comprising an outer Reed-Solomon code and an inner convolutional code
• CPC Class Codes: H03M 13/4123 implementing the return to a predetermined state
• CPC Class Codes: H04L 2025/03382 Single of vestigal sideband
• CPC Class Codes: H04L 2025/03796 Location of reference signals
• CPC Class Codes: H04L 25/03019 adaptive, i.e. capable of adjustment during data reception
• CPC Class Codes: H04N 21/23611 Insertion of stuffing data into a multiplex stream, e.g. to obtain a constant bitrate synchronisation arrangements in time-division multiplex systems using bit stuffing for systems with different or fluctuating information rates H04J3/073
• CPC Class Codes: H04N 21/2383 Channel coding or modulation of digital bit-stream, e.g. QPSK modulation arrangements for detecting or preventing errors in the information received by adapting the channel coding H04L1/0009; analogue front ends or means for connecting modulators, demodulators or transceivers to a transmission line H04L27/0002
• CPC Class Codes: H04N 21/242 Synchronization processes, e.g. processing of PCR [Program Clock References] arrangements for synchronising broadcast or distribution via plural systems in broadcast distribution systems H04H20/18
• CPC Class Codes: H04N 21/6131 involving transmission via a mobile phone network wireless downlink channel access H04W74/006

Abstract

A system, method, apparatus and computer code for communicating a training sequence for initializing an equalizer in a digital receiver are provided including receiving a digital signal containing data to be broadcast from a digital RF transmitter and inserting the training sequence into the digital signal deterministically such that a predetermined sequence of symbols are communicated to the receiver.

Claims

1. A method for communicating a training sequence for initializing an equalizer in a digital receiver, comprising the steps of:

receiving a digital signal containing data to be broadcast from a digital RF transmitter;

inserting training sequence data into the digital signal at predetermined byte locations based on a mapping of an ATSC (Advanced Television Systems Committee) A/53 data interleaver such that a continuous predetermined sequence of symbols is generated from the training sequence data and communicated to the digital receiver at known locations within a broadcast ATSC A/53 VSB (vestigial sideband) data frame; and

inserting a plurality of stuff bytes into the digital signal for deterministically initializing a plurality of ATSC A/53 Trellis coders in an exciter of the digital RF transmitter to a known state,

wherein the plurality of stuff bytes are inserted prior to encoding the training sequence data into the continuous predetermined sequence of symbols by the plurality of ATSC A/53 Trellis coders, and

wherein a first set of bits of each one of the plurality of stuff bytes are used to deterministically reset a respective first set of the plurality of ATSC A/53 Trellis coders, and a second set of bits of each one of the plurality of stuff bytes include a portion of the training sequence data.

2. The method of claim 1, further comprising:

convolutionally interleaving the digital signal.

3. The method of claim 1, wherein the digital signal further contains an identifier identifying the packet as a private data packet.

4. The method of claim 1, further comprising:

generating a plurality of container packets to contain the training sequence data, wherein the plurality of container packets are located at a plurality of predetermined positions within the digital signal.

5. A receiver operable to receive the continuous predetermined sequence of symbols according to claim 1.

6. The method according to claim 1, wherein the continuous predetermined sequence of symbols is longer than one segment of the ATSC A/53 VSB data frame.

7. The method according to claim 1, wherein the continuous predetermined sequence of training symbols corresponds to a prestored sequence of symbols stored in the digital receiver.

8. The method according to claim 1, wherein the training sequences are stored in a predetermined number of container packets.

9. The method according to claim 8, wherein the container packets are private data packets.

10. A method for communicating a training sequence for initializing an equalizer in a digital receiver, comprising the steps of:

receiving a digital signal containing data to be broadcast from a digital RF transmitter;

inserting training sequence data into the digital signal at predetermined byte locations based on a mapping of an ATSC (Advanced Television Systems Committee) A/53 data interleaver such that a continuous predetermined sequence of symbols is generated from the training sequence data and communicated to the digital receiver at known locations within a broadcast ATSC A/53 VSB (vestigial sideband) data frame; and

inserting an initialization packet into the digital signal, the initialization packet containing a plurality of stuff bytes for deterministically initializing a plurality of ATSC A/53 Trellis coders in the exciter and having a reserved space for a portion of the training sequence data.

11. The method of claim 10, further comprising:

synchronizing a plurality of ATSC A/53 VSB data frames based on an arrival of the initialization packet.

12. An apparatus for communicating a training sequence for initializing an equalizer in a digital receiver, comprising:

a receiver operable to receive a digital signal containing data to be broadcast from a digital RF transmitter; and

a packet inserter operable to insert training sequence data into the digital signal at predetermined byte locations based on a mapping of an ATSC (Advanced Television Systems Committee) A/53 data interleaver such that a continuous predetermined sequence of training symbols is generated from the training sequence data and communicated to the digital receiver at known locations within a broadcast ATSC A/53 VSB (vestigial sideband) data frame and insert a plurality of stuff bytes into the digital signal for deterministically initializing a plurality of ATSC Trellis coders in an exciter of the digital RF transmitter to a known state,

wherein the plurality of stuff bytes are inserted prior to encoding the training sequence data into the continuous predetermined sequence of symbols by the plurality of ATSC A/53 Trellis coders, and

wherein a first set of bits of each one of the plurality of stuff bytes are used to deterministically reset a respective first set of the plurality of ATSC A/53 Trellis coders, and a second set of bits of each one of the plurality of stuff bytes include a portion of the training sequence data.

13. The apparatus of claim 12,

wherein the ATSC A/53 interleaver is operable to convolutionally interleave the digital signal.

14. The apparatus of claim 12, wherein the digital signal further contains an identifier identifying the packet as a private data packet.

15. The apparatus of claim 12, wherein the packet inserter is further operable to replace a content of a plurality of container packets with the training sequence data, wherein the plurality of container packets are located at a plurality of predetermined positions within the digital signal.

16. A receiver operable to receive the continuous predetermined sequence of symbols according to claim 12.

17. The apparatus according to claim 12, wherein the continuous predetermined sequence of symbols is longer than one segment of the ATSC A/53 VSB data frame.

18. The apparatus according to claim 12, wherein the continuous predetermined sequence of training symbols corresponds to a prestored sequence of symbols stored in the digital receiver.

19. The apparatus according to claim 12, wherein the training sequence data are stored in a predetermined number of container packets.

20. The apparatus according to claim 19, wherein the container packets are private data packets.

21. An apparatus for communicating a training sequence for initializing an equalizer in a digital receiver, comprising:

a receiver operable to receive a digital signal containing data to be broadcast from a digital RF transmitter; and

a packet inserter operable to insert training sequence data into the digital signal at predetermined byte locations based on a mapping of an ATSC (Advanced Television Systems Committee) A/53 data interleaver such that a continuous predetermined sequence of training symbols is generated from the training sequence data and communicated to the digital receiver at known locations within a broadcast ATSC A/53 VSB (vestigial sideband) data frame and insert an initialization packet into the digital signal, the initialization packet containing a plurality of stuff bytes for deterministically initializing a plurality of ATSC A/53 Trellis coders in the digital RF transmitter and having a reserved space for a portion of the training sequence data.

22. The apparatus of claim 21, wherein a plurality of ATSC A/53 VSB data frames are synchronized based on an arrival of the initialization packet.

23. A computer program product comprising a non-transitory computer usable medium having control logic stored therein for causing a computer to communicate a training sequence for initializing an equalizer in a digital receiver, said control logic comprising:

computer readable program code means for causing the computer to receive a digital signal containing data to be broadcast from a digital RF transmitter;

computer readable program code means for causing the computer to insert training sequence data into the digital signal at predetermined byte locations based on a mapping of an ATSC (Advanced Television Systems Committee) A/53 data interleaver such that a continuous predetermined sequence of training symbols is generated from the training sequence data and communicated to the digital receiver at known locations within a broadcast ATSC A/53 VSB (vestigial sideband) data frame; and

computer readable program code means for causing the computer to insert a plurality of stuff bytes into the digital signal for deterministically initializing a plurality of ATSC A/53 Trellis coders in an exciter of the digital RF transmitter to a known state,

wherein the plurality of stuff bytes are inserted prior to encoding the training sequence data into the continuous predetermined sequence of symbols by the plurality of ATSC A/53 Trellis coders, and

wherein a first set of bits of each one of the plurality of stuff bytes are used to deterministically reset a respective first set of the plurality of ATSC A/53 Trellis coders, and a second set of bits of each one of the plurality of stuff bytes include a portion of the training sequence data.

24. The computer program product of claim 23, further comprising:

computer readable program code means for causing the computer to convolutionally interleave the digital signal.

25. The computer program product of claim 23, wherein the digital signal further contains an identifier identifying the packet as a private data packet.

26. The computer program product of claim 23, further comprising:

computer readable program code means for causing the computer to generate a plurality of container packets to contain the training sequence data, wherein the plurality of container packets are located at a plurality of predetermined positions within the digital signal.

27. The computer program product according to claim 23, wherein the continuous predetermined sequence of symbols is longer than one segment of the ATSC A/53 VSB data frame.

28. The computer program product according to claim 23, wherein the continuous predetermined sequence of training symbols corresponds to a prestored sequence of symbols stored in the digital receiver.

29. The computer program product according to claim 23, wherein the training sequence data are stored in a predetermined number of container packets.

30. The computer program product according to claim 29, wherein the container packets are private data packets.

31. A computer program product comprising a non-transitory computer usable medium having control logic stored therein for causing a computer to process the continuous predetermined sequence of symbols in accordance with claim 23.

32. A computer program product comprising a non-transitory computer usable medium having control logic stored therein for causing a computer to communicate a training sequence for initializing an equalizer in a digital receiver, said control logic comprising:

computer readable program code means for causing the computer to receive a digital signal containing data to be broadcast from a digital RF transmitter;

computer readable program code means for causing the computer to insert training sequence data into the digital signal at predetermined byte locations based on a mapping of an ATSC (Advanced Television Systems Committee) A/53 data interleaver such that a continuous predetermined sequence of training symbols is generated from the training sequence data and communicated to the digital receiver at known locations within a broadcast ATSC A/53 VSB (vestigial sideband) data frame; and

computer readable program code means for causing the computer to insert an initialization packet into the digital signal, the initialization packet containing a plurality of stuff bytes for deterministically initializing a plurality of ATSC A/53 Trellis coders in the digital RF transmitter and having a reserved space for a portion of the training sequence data.

33. The computer program product of claim 32, further comprising:

computer readable program code means for causing the computer to synchronize a plurality of ATSC A/53 VSB data frames based on an arrival of the initialization packet.

34. A system for communicating a training sequence for initializing an equalizer in a digital receiver, comprising:

a multiplexer operable to generate a plurality of container packets to contain training sequence data, wherein the plurality of container packets are located at a plurality of predetermined positions within a digital signal; and

an exciter operable to receive the digital signal containing data to be broadcast from a digital RF transmitter and insert the training sequence data into the container packets at predetermined byte locations based on a mapping of an ATSC (Advanced Television Systems Committee) data interleaver such that a continuous predetermined sequence of symbols is generated from the training sequence and communicated to the digital receiver at known locations within a broadcast ATSC A/53 VSB (vestigial sideband) data frame and insert a plurality of stuff bytes into the digital signal for deterministically initializing a plurality of ATSC A/53 Trellis coders in the exciter to a known state,

wherein the plurality of stuff bytes are inserted prior to encoding the training sequence data into the continuous predetermined sequence of symbols by the plurality of ATSC A/53 Trellis coders, and

wherein a first set of bits of each one of the plurality of stuff bytes are used to deterministically reset a respective first set of the plurality of ATSC A/53 Trellis coders, and a second set of bits of each one of the plurality of stuff bytes include a portion of the training sequence data.

35. The system according to claim 34, wherein the continuous predetermined sequence of symbols is longer than one segment of the ATSC A/53 VSB data frame.

36. The system according to claim 34, wherein the continuous predetermined sequence of training symbols corresponds to a prestored sequence of symbols stored in the digital receiver.

37. The system according to claim 34, wherein the training sequences are stored in a predetermined number of container packets.

38. A system for communicating a training sequence for initializing an equalizer in a digital receiver, comprising:

a multiplexer operable to generate a plurality of container packets to contain training sequence data, wherein the plurality of container packets are located at a plurality of predetermined positions within a digital signal, and insert an initialization packet into the digital signal, the initialization packet containing a plurality of stuff bytes for deterministically initializing a plurality of ATSC A/53 Trellis coders in the digital RF transmitter and having a reserved space for a portion of the training sequence data; and

an exciter operable to receive the digital signal containing data to be broadcast from a digital RF transmitter and insert the training sequence data into the container packets at predetermined byte locations based on a mapping of an ATSC (Advanced Television Systems Committee) data interleaver such that a continuous predetermined sequence of symbols is generated from the training sequence and communicated to the digital receiver at known locations within a broadcast ATSC A/53 VSB (vestigial sideband) data frame.

39. The system of claim 38, wherein a plurality of ATSC A/53 VSB data frames are synchronized based on an arrival of the initialization packet.

40. A method for communicating a training sequence for initializing an equalizer in a digital receiver, comprising the steps of:

receiving a digital signal containing data to be broadcast from a digital RF transmitter;

inserting training sequence data into the digital signal at predetermined byte locations based on a mapping of an ATSC (Advanced Television Systems Committee) A/53 data interleaver such that a continuous predetermined sequence of symbols is generated from the training sequence data and communicated to the digital receiver at known locations within a broadcast ATSC A/53 VSB (vestigial sideband) data frame; and

inserting a plurality of stuff bytes into the digital signal for deterministically initializing a plurality of ATSC A/53 Trellis coders in an exciter of the digital RF transmitter to a known state,

wherein the plurality of stuff bytes are inserted prior to encoding the training sequence data into the continuous predetermined sequence of symbols by the plurality of ATSC A/53 Trellis coders, and

wherein four bits of each one of the plurality of stuff bytes are used to deterministically reset the plurality of ATSC A/53 Trellis coders, and another four bits of each one of the plurality of stuff bytes include a portion of the training sequence data.

41. An apparatus for communicating a training sequence for initializing an equalizer in a digital receiver, comprising:

a receiver operable to receive a digital signal containing data to be broadcast from a digital RF transmitter;

a packet inserter operable to insert training sequence data into the digital signal at predetermined byte locations based on a mapping of an ATSC (Advanced Television Systems Committee) A/53 data interleaver such that a continuous predetermined sequence of training symbols is generated from the training sequence data and communicated to the digital receiver at known locations within a broadcast ATSC A/53 VSB (vestigial sideband) data frame, and insert a plurality of stuff bytes into the digital signal for deterministically initializing a plurality of ATSC Trellis coders in an exciter of the digital RF transmitter to a known state,

wherein the plurality of stuff bytes are inserted prior to encoding the training sequence data into the continuous predetermined sequence of symbols by the plurality of ATSC A/53 Trellis coders, and

wherein four bits of each one of the plurality of stuff bytes are used to deterministically reset the plurality of ATSC A/53 Trellis coders, and another four bits of each one of the plurality of stuff bytes include a portion of the training sequence data.

42. A computer program product comprising a non-transitory computer usable medium having control logic stored therein for causing a computer to communicate a training sequence for initializing an equalizer in a digital receiver, said control logic comprising:

computer readable program code means for causing the computer to receive a digital signal containing data to be broadcast from a digital RF transmitter;

computer readable program code means for causing the computer to insert training sequence data into the digital signal at predetermined byte locations based on a mapping of an ATSC (Advanced Television Systems Committee) A/53 data interleaver such that a continuous predetermined sequence of training symbols is generated from the training sequence data and communicated to the digital receiver at known locations within a broadcast ATSC A/53 VSB (vestigial sideband) data frame; and

computer readable program code means for causing the computer to insert a plurality of stuff bytes into the digital signal for deterministically initializing a plurality of ATSC A/53 Trellis coders in an exciter of the digital RF transmitter to a known state,

wherein the plurality of stuff bytes are inserted prior to encoding the training sequence data into the continuous predetermined sequence of symbols by the plurality of ATSC A/53 Trellis coders, and

wherein four bits of each one of the plurality of stuff bytes are used to deterministically reset the plurality of ATSC A/53 Trellis coders, and another four bits of each one of the plurality of stuff bytes include a portion of the training sequence data.

43. The system according to claim 42, wherein the container packets are private data packets.

44. A system for communicating a training sequence for initializing an equalizer in a digital receiver, comprising:

a multiplexer operable to generate a plurality of container packets to contain training sequence data, wherein the plurality of container packets are located at a plurality of predetermined positions within a digital signal;

an exciter operable to receive the digital signal containing data to be broadcast from a digital RF transmitter and insert the training sequence data into the container packets at predetermined byte locations based on a mapping of an ATSC (Advanced Television Systems Committee) data interleaver such that a continuous predetermined sequence of symbols is generated from the training sequence and communicated to the digital receiver at known locations within a broadcast ATSC A/53 VSB (vestigial sideband) data frame and insert a plurality of stuff bytes into the digital signal for deterministically initializing a plurality of ATSC A/53 Trellis coders in the exciter to a known state,

wherein the plurality of stuff bytes are inserted prior to encoding the training sequence data into the continuous predetermined sequence of symbols by the plurality of ATSC A/53 Trellis coders, and

wherein four bits of each one of the plurality of stuff bytes are used to deterministically reset the plurality of ATSC A/53 Trellis coders, and another four bits of each one of the plurality of stuff bytes include a portion of the training sequence data.