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Adaptive antenna array wireless data access point

  • US 6,901,062 B2
  • Filed: 11/30/2000
  • Issued: 05/31/2005
  • Est. Priority Date: 12/01/1999
  • Status: Active Grant
First Claim
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1. A wireless communication system providing adaptive beam forming in a transmit signal path, said system comprising:

  • an array of antenna elements, wherein said array includes at least M spaced apart antenna elements;

    signal transmission circuitry providing M orthogonal renditions of a first signal, wherein said signal transmission circuitry is coupled to said M spaced apart antenna elements to provide a different one of said M orthogonal renditions of said first signal to each of said M spaced apart antenna elements for radiation in said transmit signal path;

    signal reception circuitry providing discrete information with respect to each one of said M orthogonal renditions of said first signal as determined from a composite receive signal of said M orthogonal renditions of said first signal;

    channel estimator circuitry coupled to said signal reception circuitry and receiving said discrete information with respect to each one of said M orthogonal renditions of said first signal, wherein said channel estimator circuitry determines a spatial signature associated with said composite receive signal; and

    beam forming circuitry providing beam forming coefficients to be used in transmission of a second signal, wherein said beam forming coefficients are determined as a function of a conjugate of said spatial signature.

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