Self-Protection Against Non-Stationary Disturbances

• US 20070157065A1
• Filed: 12/22/2006
• Published: 07/05/2007
• Est. Priority Date: 12/30/2005
• Status: Active Grant

• Current Assignee: Ikanos Communications Incorporated (Qualcomm, Inc.)
• Original Assignee: Conexant Systems Incorporated (Synaptics Incorporated)
• Inventors: Mahadevan, Amitkumar, Duvaut, Patrick, Pons, Julien
• Granted Patent: US 8,457,219 B2
• Time in Patent Office: Days
• US Class Current: 714/758
• CPC Class Codes: H03M 13/1102 Codes on graphs and decoding on graphs, e.g. low-density parity check [LDPC] codes
• 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 13/2957 Turbo codes and decoding
• CPC Class Codes: H03M 13/31 combining coding for error detection or correction and efficient use of the spectrum without error detection or correction H03M5/14 , H03M5/145
• CPC Class Codes: H03M 13/6362 by puncturing
• CPC Class Codes: H04L 1/0066 Parallel concatenated codes
• CPC Class Codes: H04L 1/0068 by puncturing
• CPC Class Codes: H04L 1/0071 Use of interleaving interleaving per se H03M13/27
• CPC Class Codes: H04L 27/2601 Multicarrier modulation systems

Abstract

Included are embodiments for self protection. At least one embodiment includes Self-protection Unit for protecting a signal that includes a first receiving component configured to receive data, the received data being received as at least one frame and a subframing component configured to subframe at least a portion of the received data, wherein subframing includes converting the at least one into a plurality of subframes. Some embodiments include a subframe interleaver component configured to interleave at least a portion of the subframes.

Claims

1. A self-protection unit for protecting a signal, comprising:

a first receiving component configured to receive encoded data, the received data being received as at least one frame;

a subframing component configured to subframe at least a portion of the received data, wherein subframing includes converting the at least one into a plurality of subframes; and

a subframe interleaver component configured to interleave at least a portion of the subframes.

2. The self-protection unit of claim 1, wherein the encoded data is generated by an encoder formed by a serial concatenation of an outer encoder device, an outer interleaver device, and an inner encoder device.

3. The self-protection unit of claim 1, further comprising:

a second receiving component configured to receive demapped data;

an error detector component configured to detect whether a multicarrier symbol received from a channel has been corrupted by non-stationary noise; and

an erasing component configured to erase demapped data associated with at least one symbol that is corrupted by the non-stationary noise.

4. The self-protection unit of claim 1, further comprising a subframe deinterleaver component configured to deinterleave at least a portion of the subframes.

5. The self-protection unit of claim 1, further comprising a desubframer component configured to desubframe at least a portion of the subframes.

6. The self-protection unit of claim 1, further comprising a calibration component configured to determine whether subframe interleaving is desired;

and

a desired number of subframes per frame;

a desired interleaving technique; and

a desired subframing pattern.

7. The self-protection unit of claim 1, wherein the self-protection unit is embodied in at least one of the following:

a set-top box, a television, a portable appliance, a gaming unit, a satellite system, an MP3 player, an iPod player, a cellular telephone, a wireline communications system, a Digital Subscriber Line (DSL) modem, and a wireless communication system.

15. The self-protection unit of claim 5, further comprising at least a portion of the plurality of subframes.

21. The system of claim 1, further comprising means for desubframing at least a portion of the subframes.

8. A method for self protection, comprising:

receiving data, the received encoded data being received as at least one frame; and

dividing and reordering the at least one frame into a plurality of subframes, at least one of the plurality frames being a subset of the at least one frame.

9. The method of claim 8, wherein the received data is received from an encoder formed by a serial concatenation of an outer encoder device, an outer interleaver device, and an inner encoder device.

10. The method of claim 8, wherein dividing and reordering the at least one frame into a plurality of subframes includes determining a subframing pattern.

11. The method of claim 8, wherein dividing and reordering the at least one frame into a plurality of subframes, includes randomly ordering the at least one frame into a plurality of subframes.

12. The method of claim 8, wherein dividing and reordering the at least one frame into a plurality of subframes, includes distributing systematic, parity, and interleaved parity bits generated by a turbo code into a plurality of subframes such that the systematic, parity, and interleaved parity bits generated by a common information bit are distributed to different subframes,

wherein systematic bits generated by contiguous information bits are distributed to different subframes,

wherein parity bits generated by contiguous information bits are distributed to different subframes, and

wherein interleaved parity bits generated by contiguous information bits are distributed to different subframes.

13. The method of claim 8, wherein each subframe includes elements that are contiguous in the at least one frame.

14. The method of claim 8, further comprising interleaving at least a portion of the subframes.

16. The method of claim 8, wherein at least a portion of the method is performed in at least one of the following:

a set-top box, a television, a portable appliance, a gaming unit, a satellite system, an MP3 player, an iPod®

player, a cellular telephone, a wireline communications system, a Digital Subscriber Line (DSL) modem, and a wireless communications system.

17. A system for protecting a signal, comprising:

means for receiving encoded data, the received data being received as at least one frame;

means for subframing at least a portion of the received data, wherein subframing includes converting the at least one into a plurality of subframes; and

means for interleaving at least a portion of the subframes.

18. The system of claim 17, wherein the received data is received an encoder formed by a serial concatenation of an outer encoder device, an outer interleaver device, and an inner encoder device.

19. The system of claim 17, further comprising:

means for receiving demapped data;

means for detecting whether a multicarrier symbol received from a channel has been corrupted by non-stationary noise; and

means for erasing demapped data associated with at least one symbol that is corrupted by the non-stationary noise.

20. The system of claim 17, further comprising means for deinterleaving at least a portion of the subframes.

22. The system of claim 17, wherein the system includes at least one of the following:

a set-top box, a television, a portable appliance, a gaming unit, a satellite system, an MP3 player, an iPod®

player, a cellular telephone, a wireline communications device, a Digital Subscriber Line (DSL) modem, and a wireless communication receiver.