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Antenna/Beam Selection Training in MIMO Wireless LANs with Different Sounding Frames

  • US 20090290563A1
  • Filed: 03/30/2006
  • Published: 11/26/2009
  • Est. Priority Date: 11/21/2005
  • Status: Active Grant
First Claim
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1. A method for selecting antennas in a multiple-input, multiple-output (MIMO) wireless local area network (WLAN) including a plurality of stations, each station including a set of antennas, said method comprising steps of:

  • receiving, via a channel, at a station in the WLAN plural consecutive packets including plural sounding packets, each sounding packet corresponding to a different subset of the set of antennas, and at least one of the plural consecutive packets including (i) a high throughput (HT) control field including a signal to initiate antenna selection and (ii) a number N indicative of a number of sounding packets which follow the at least one packet including the HT control field and which are to be used for antenna selection;

    estimating a channel matrix based on a characteristic of the channel as indicated by the received N sounding packets; and

    selecting a subset of antennas according to the channel matrix.

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