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Method for selecting propagation paths retained for receiving messages transmitted by CDMA radiocommunication

  • US 5,448,600 A
  • Filed: 08/12/1994
  • Issued: 09/05/1995
  • Est. Priority Date: 08/13/1993
  • Status: Expired due to Fees
First Claim
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1. A method for selecting multiple propagation paths retained for receiving messages transmitted in a code-division multiple access (CDMA) radiocommunication system, each path being identified by a delay which is applied to at least one spreading sequence for determining a correlation between a received signal and said spreading sequence, wherein, for each selected delay, reception energy of a CDMA signal consisting of a correlation between the received signal and a reference spreading sequence is estimated, wherein other delays are successively tested by estimating the reception energy for each tested delay and, when the reception energy for a tested delay is greater than at least one of the reception energies associated with the previously selected delays, said tested delay is substituted for the one of the previously selected delays for which the reception energy is the lowest, and wherein the tested delays are chosen with a choice probability having a maximum for the shortest of the selected delays.

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