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Multiple access coding for radio communications

  • US 5,771,288 A
  • Filed: 02/10/1997
  • Issued: 06/23/1998
  • Est. Priority Date: 04/10/1992
  • Status: Expired due to Term
First Claim
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1. A terminal for a communication system including a base station and the terminal, information being exchangeable between the terminal and the base station by direct sequence spread spectrum communication, the terminal comprising:

  • means for converting information for transmission to digital words;

    means for converting digital words to corresponding Walsh-Hadamard words;

    means for combining Walsh-Hadamard words with a coding sequence to produce coded words;

    a modulator, wherein the modulator uses coded words to modulate a carrier signal; and

    a code generator, wherein the code generator generates the coding sequence by clocking through a plurality of internal states based on a binary mask that is known only to the terminal and the base station.

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