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Method and apparatus for using orthogonal coding in a communication system

  • US 5,204,874 A
  • Filed: 02/19/1992
  • Issued: 04/20/1993
  • Est. Priority Date: 08/28/1991
  • Status: Expired due to Term
First Claim
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1. An apparatus comprising a signal encoder, the signal encoder comprising:

  • (a) encoding means for encoding input data bits of a signal into data symbols and grouping the data symbols, the data symbols being encoded with an encoding algorithm, wherein the encoding algorithm produces data symbols which are subsequently decoded into data signal bits using maximum likelihood decoding, the encoding algorithm comprising implementing at least one generator function having weight spectrum optimized for use in orthogonal coding; and

    (b) translating means, operatively coupled to the encoding means, for translating the groups of data symbols according to an algorithm selected from the group consisting essentially of (i) interleaving by group each group of data symbols within a predetermined size block and subsequently deriving an orthogonal code from each group of interleaved data symbols and (ii) deriving an orthogonal code from each group of data symbols and subsequently interleaving by orthogonal code each orthogonal code within a predetermined size block.

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