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Methods of and devices for enhancing communications that use spread spectrum technology by using variable code techniques

DC
  • US 5,546,420 A
  • Filed: 04/29/1994
  • Issued: 08/13/1996
  • Est. Priority Date: 04/29/1994
  • Status: Expired due to Term
First Claim
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1. In a method of processing a signal, comprising the steps of applying a spread spectrum coding process, the signal being a function of time, the improvement comprising:

  • (a) encoding a first segment of the signal with a first channel encoder operating at a first rate to generate a first encoded segment having more significant bits using a first error protection process; and

    (b) encoding a second segment of the signal with a second channel encoder operating at a second rate to generate a second encoded segment having less significant bits using a second error protection process, the second rate being different from the first rate and the first error protection process providing a greater amount of error protection than the second error protection process.

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