System and method for space diversified linear block interleaving

• US 20040071240A1
• Filed: 10/08/2003
• Published: 04/15/2004
• Est. Priority Date: 12/30/1997
• Status: Active Grant

• Current Assignee: Summit Technology Systems LP
• Original Assignee: Summit Technology Systems LP
• Inventors: Betts, William L.
• Granted Patent: US 7,733,966 B2
• Time in Patent Office: Days
• US Class Current: 375/346
• CPC Class Codes: H04L 1/0071 Use of interleaving interleaving per se H03M13/27
• CPC Class Codes: H04L 27/2602 Signal structure

Abstract

The present invention is directed to unique methods and apparatus for suppressing impulse noise in a multipoint communications environment using a linear block interleaver. One representative embodiment comprises first logic configured to arithmetically combine a time series of input symbols into a block of N-symbol combinations, and second logic configured to transmit, on a separate channel, each N-symbol combination to a receiver. The first logic is located in a transmitter of a first communications device. The time series has size N and N is greater than one, and each of the input symbols is taken from a signaling constellation.

Claims

1. A communication system for noise suppression comprising:

first logic configured to combine a time series of input symbols, where the time series has size N and N is greater than one, into a block of N-symbol combinations, where each of the input symbols is taken from a signaling constellation; and

second logic configured to transmit each N-symbol combination, on a separate channel, to a receiver.

2. The system of claim 1, further comprising:

third logic configured to receive a transmitted signal; and

fourth logic configured to combine the block of N-symbol combinations in order to recover the time series of input symbols.

3. The system of claim 1, wherein each N-symbol combination in the block appears simultaneously as an output of the first logic.

4. The system of claim 1, where each N-symbol combination contains a weighted sample of all of the input symbols.

5. The system of claim 1, where the second logic transmits all N-symbol combinations simultaneously.

6. The system of claim 1, further comprising logic to scale each of the input symbols by a scale factor.

7. The system of claim 2, where noise energy present in each of the time series of input symbols is spread among at least one of the N-symbol combinations such that the noise energy is reduced.

8. The system of claim 2, further comprising logic configured to re-interleave the block of N-symbol combinations in order to generate error signals used to update adaptive algorithms.

9. The system of claim 2, further comprising:

fifth logic configured to de-interleave the block of N-symbol combinations to produce a block of N de-interleaved reference symbols;

sixth logic configured to re-interleave the block of N de-interleaved reference symbols to produce a block of N interleaved reference symbols;

seventh logic configured to update a decision feedback equalizer with each of the N interleaved reference symbols.

10. A method for noise suppression comprising the steps of:

combining a time series of input symbols, where the time series has size N and N is greater than one, into a block of N-symbol combinations, where each of the input symbols is taken from a signaling constellation; and

transmitting each N-symbol combination, on a separate channel, to a receiver.

11. The method of claim 10, further comprising the steps of:

receiving a transmitted signal; and

combining the block of N-symbol combinations in order to recover the time series of input symbols.

12. A communication system for noise suppression comprising:

a means for combining a time series of input symbols, where the time series has size N and N is greater than one, into a block of N-symbol combinations, where each of the input symbols is taken from a signaling constellation; and

logic configured to transmit each N-symbol combination, on a separate channel, to a receiver.

13. The system of claim 12, further comprising:

logic configured to receive a transmitted signal; and

means for combining the block of N-symbol combinations in order to recover the time series of input symbols.

14. The system of claim 13, further comprising means for re-interleaving the block of N-symbol combinations in order to generate error signals used to updated adaptive algorithms.

15. The system of claim 13, further comprising:

means for de-interleaving the block of N-symbol combinations to produce a block of N de-interleaved reference symbols;

means for re-interleaving the block of N de-interleaved reference symbols to produce a block of N interleaved reference symbols;

means for updating a decision feedback equalizer with the each of the block of N interleaved reference symbols.

16. A program embodied in a computer-readable medium, the program comprising:

first logic configured to combine a time series of input symbols, where the time series has size N and N is greater than one, into a block of N-symbol combinations, where each of the input symbols is taken from a signaling constellation; and

second logic configured to transmit each N-symbol combination, on a separate channel, to a receiver.

17. The system of claim 16, further comprising:

third logic configured to receive a transmitted signal; and

fourth logic configured to combine the block of N-symbol combinations in order to recover the time series of input symbols.

18. The system of claim 16, wherein each N-symbol combination in the block appears simultaneously as the output of the first logic.

19. The system of claim 16, where each N-symbol combination contains a weighted sampled of all of the input symbols.

20. The system of claim 16, where the second logic transmits all N-symbol combinations simultaneously.