Discrete multitone interleaver
View Patent ↗A discrete multitone interleaver system, including an interleaver and deinterleaver, are provided for efficiently communicating data despite noise affecting a Discrete Multitone modulation (DMT) system. The discrete multitone interleaver includes a convolutional encoder capable of receiving a plurality of bits on tones and capable of outputting a convolutionally encoded plurality of bits and a synchronized dual skipping switch capable of passing the plurality of bits on tones to the convolutional encoder in a non-sequential order and capable of outputting the convolutionally encoded plurality of bits in the same non-sequential order. The discrete multitone deinterleaver includes a convolutional decoder capable of receiving a plurality of bits on tones and capable of outputting convolutionally decoded bits and a synchronized dual skipping switch capable of passing the bits to the convolutional decoder in a non-sequential order and capable of outputting the convolutionally decoded plurality of bits in the same non-sequential order.
1. A method for transmitting data, comprising the steps of:
(a) receiving a first plurality of bits on a first tone from a bit extractor buffer through a synchronized dual skipping switch;
(b) receiving a second plurality of bits on a second tone from the bit extractor through the synchronized dual skipping switch, wherein the second tone is not adjacent to the first tone;
(c) convolutionally encoding the first and second pluralities of bits; and
(d) outputting the convolutionally encoded first and second pluralities of bits through the synchronized dual skipping switch.
2. The method of claim 1 , further comprising:
(e) mapping the convolutionally encoded first and second pluralities of bits.
3. The method of claim 2 , further comprising:
(f) buffering the mapped and convolutionally encoded first and second pluralities of bits.
4. The method of claim 1 , wherein the first and second tones are separated by a variable number of tones.
5. The method of claim 4 , wherein the variable number of tones is determined by a receiver.
6. The method of claim 1 , wherein the first and second pluralities of bits are DMT symbols.