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Method and apparatus for interference suppression with efficient matrix inversion in a DS-CDMA system

  • US 8,121,177 B2
  • Filed: 11/17/2010
  • Issued: 02/21/2012
  • Est. Priority Date: 09/23/2002
  • Status: Expired due to Term
First Claim
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1. A method for interference suppression in a receiver, the method comprising:

  • receiving as part of a signal stream in a receiver a desired signal path having symbols of a first length;

    receiving as part of said signal stream in a receiver an interfering signal path having symbols of a second length; and

    forming an interference matrix in a cancellation controller having at least two interference vectors;

    wherein a first of said interference vectors includes a representation of at least a portion of a first interfering symbol included in said interfering signal path;

    wherein a last of said interference vectors comprises a representation of at least a portion of a second symbol included in said interfering signal path; and

    applying the interference matrix to reduce interference from the signal stream;

    wherein said second length is measured in chips, and wherein an intermediate interference vector comprises a number of non-zero elements equal to a number of chips in said symbols of said second length.

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