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System and method for trellis decoding in a multi-pair transceiver system

  • US 6,253,345 B1
  • Filed: 08/09/1999
  • Issued: 06/26/2001
  • Est. Priority Date: 11/13/1998
  • Status: Expired due to Term
First Claim
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1. A method for computing a distance of a received word from a codeword, the codeword being a concatenation of L symbols selected from two disjoint symbol subsets X and Y, the codeword being included in one of a plurality of code-subsets, the received word being represented by L inputs, each of the L inputs uniquely corresponding to one of L dimensions, the method comprising the operations of:

  • (a) producing a set of one-dimensional errors from the L inputs, each of the one-dimensional errors representing a distance metric between one of the L inputs and a symbol in one of the two disjoint symbol-subsets; and

    (b) combining the one-dimensional errors to produce a set of L-dimensional errors such that each of the L-dimensional errors is a distance of the received word from a nearest codeword in one of the code-subsets.

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