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Beam forming apparatus and method for an array antenna system

  • US 20050271016A1
  • Filed: 05/06/2005
  • Published: 12/08/2005
  • Est. Priority Date: 05/07/2004
  • Status: Active Grant
First Claim
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1. A beam forming apparatus for an antenna diversity system with an array antenna having a plurality of antenna elements, the apparatus comprising:

  • an interference and noise calculator for estimating interference power RDOA and spectral noise density N0 of a radio channel using a signal received through the radio channel, and calculating total noise power of the radio channel according to the interference power and the spectral noise density;

    a channel estimator for calculating a phase matrix including phase factors associated with a predetermined number of direction-of-arrival (DOA) values and a directional channel impulse response matrix using the total noise power, and calculating a combined channel impulse response by combining the phase matrix with the directional channel impulse response matrix; and

    a beam former for performing beam forming for transmission and reception through the array antenna using the combined channel impulse response.

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