System and method for space diversified linear block interleaving
View Patent ↗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.
1. A communication system comprising:
first logic configured to combine a time series of N input symbols into a block of output symbols, wherein N is greater than one, wherein the block comprises N output symbols, wherein each of the output symbols comprises a combination of the N input symbols, wherein each of the input symbols is taken from a signaling constellation, and wherein each output symbol is associated with a respective one of a plurality of different channels, such that a stream of ideal reference symbols when re-interleaved generates error signals; and
second logic configured to transmit each output symbol on one of the plurality of different channels.
2. The system of claim 1 , further comprising:
third logic configured to receive a transmitted signal, wherein the transmitted signal includes each output symbol; and
fourth logic configured to combine the block of output symbols in order to recover the time series of N input symbols.
3. The system of claim 1 , wherein each output symbol in the block appears simultaneously as an output of the first logic.
4. The system of claim 1 , where each output symbol contains a weighted sample of all of the input symbols.
5. The system of claim 1 , where the second logic transmits all output symbols simultaneously.
6. The system of claim 1 , further comprising logic to scale each of the N input symbols by a scale factor.
7. The system of claim 2 , where noise energy present in at least one of the received output symbols is spread among each of the recovered time series of N input symbols such that the noise energy is reduced.
8. The system of claim 2 , further comprising:
fifth logic configured to de-interleave the block of output symbols to produce a block of N de-interleaved reference symbols.
9. A method comprising:
combining a time series of N input symbols into a block of output symbols, wherein N is greater than one, wherein the block comprises N output symbols, wherein each of the output symbols comprises a combination of the N input symbols, wherein each of the input symbols is taken from a signaling constellation, and wherein each output symbol is associated with a respective one of a plurality of different channels, such that a stream of ideal reference symbols when re-interleaved generates error signals; and
transmitting each output symbol on one of the plurality of different channels.
10. The method of claim 9 , further comprising:
receiving a transmitted signal; and
combining the block of output symbols in order to recover the time series of N input symbols.
11. A communication system comprising:
means for combining a time series of N input symbols into a block of output symbols, wherein N is greater than one, wherein the block comprises N output symbols, wherein each of the output symbols comprises a combination of the N input symbols, where each of the input symbols is taken from a signaling constellation, and wherein each output symbol is associated with a respective one of a plurality of different channels, such that a stream of ideal reference symbols when re-interleaved generates error signals; and
means for transmitting each output symbol on one of the plurality of different channels.
12. The system of claim 11 , further comprising:
means for receiving a transmitted signal; and
means for combining the block of output symbols in order to recover the time series of N input symbols.
13. The system of claim 12 , further comprising:
means for de-interleaving the block of output symbols to produce a block of N de-interleaved reference symbols;
means for re-interleaving the ideal 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.
14. A program embodied in a computer-readable storage medium, the program comprising:
first logic configured to combine a time series of N input symbols into a block of output symbols, wherein N is greater than one, wherein the block comprises N output symbols, wherein each of the output symbols comprises a combination of the N input symbols, wherein each of the input symbols is taken from a signaling constellation, and wherein each output symbol is associated with a respective one of a plurality of different channels, such that a stream of ideal reference symbols when re-interleaved generates error signals; and
second logic configured to transmit each output symbol on one of the plurality of different channels.
15. The program of claim 14 , further comprising:
third logic configured to receive a transmitted signal; and
fourth logic configured to combine the block of output symbols in order to recover the time series of N input symbols.
16. The program of claim 14 , wherein each output symbol in the block appears simultaneously as the output of the first logic.
17. The program of claim 14 , where each output symbol contains a weighted sample of all of the input symbols.
18. The program of claim 14 , where the second logic transmits all output symbols simultaneously.
19. The system of claim 8 , further comprising:
sixth logic configured to re-interleave the ideal 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.