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Method and apparatus for improved estimation of selective channels in an OFDMA system with dedicated pilot tones

  • US 7,826,489 B2
  • Filed: 03/23/2007
  • Issued: 11/02/2010
  • Est. Priority Date: 03/23/2007
  • Status: Expired due to Fees
First Claim
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1. A method of channel estimation for a wireless communication system, comprising:

  • using an antenna for receiving dedicated pilot symbols transmitted over at least one time-frequency region for at least one user; and

    estimating channel parameters for the at least one time-frequency region based on the received dedicated pilot symbols by;

    computing projection terms of the received dedicated pilot symbols on dimensions occupied by a signal of the at least one user;

    estimating variations in at least one of time or frequency domain of a channel for each of the at least one user using the computed projection terms;

    correcting the computed projection terms using the estimated variations; and

    estimating the channel parameters based on the corrected projection terms.

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