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CDMA multiple access interference cancellation using signal estimation

  • US 6,404,760 B1
  • Filed: 07/19/1999
  • Issued: 06/11/2002
  • Est. Priority Date: 07/19/1999
  • Status: Expired due to Term
First Claim
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1. In a communication system having a base station and a plurality of user stations that exchange communication signals between the base station and each of the plurality of users, a method for reducing multiple access interference between transmitted communication signals, the method comprising:

  • receiving a plurality of code division multiple access signals;

    finding a first signal of the plurality of code division multiple access signals that has a greatest amplitude;

    receiving a first pilot signal associated with the first signal;

    determining parameters from the first pilot signal;

    decoding first data from the first signal;

    constructing a first replica of the first signal from the first data;

    combining the first replica with parameters derived from the first pilot signal to provide a first subtractive signal; and

    subtracting the first subtractive signal from the plurality of code division multiple access signals to provide a first reduced plurality of code division multiple access signals.

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