Wireless Communication Using Beam Forming And Diversity

  • US 20090175383A1
  • Filed: 03/16/2009
  • Published: 07/09/2009
  • Est. Priority Date: 08/02/2004
  • Status: Active Grant
First Claim
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1. A beam forming lookup chain in a receiver, the beam forming lookup chain comprising:

  • a key cache for storing a first plurality of entries, each entry including at least transmit antenna data, receive acknowledgement antenna data, transmitter address data, and a beam forming enable bit;

    a coefficient aging table for storing a second plurality of entries, each entry including at least coefficient aging table valid data, key cache index data, and timestamp data; and

    a coefficient cache for storing a third plurality of entries, each entry including beam forming coefficients,wherein a transmitter address of a received packet is compared to transmitter address data in the key cache, wherein a transmitter address match indicates a key cache index, wherein the key cache index is compared to the key cache index data in the coefficient aging table, and wherein a matching, valid, non-expired key cache index in the coefficient aging table indicates a corresponding entry in the coefficient cache.

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