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Method and apparatus for preamble training in a multiple antenna communication system

  • US 8,619,907 B2
  • Filed: 01/24/2005
  • Issued: 12/31/2013
  • Est. Priority Date: 06/10/2004
  • Status: Active Grant
First Claim
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1. A method for transmitting data in a multiple antenna communication system having N transmit antennas, said method comprising the steps of:

  • obtaining a signal comprising a legacy preamble having at least one legacy long training field and at least one legacy short training field and an extended portion having in the range of one to N−

    1 additional long training fields on each of said N transmit antennas and at least one additional short training field, wherein each additional long training field contains one long OFDM symbol and N is greater than two, wherein said long OFDM symbol utilizes a frequency grid of M points and wherein a data OFDM symbol utilizes a frequency grid of M/2 points, and transmitting said signal.

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