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Noise variance estimation in wireless communications for diversity combining and log-likelihood scaling

  • US 7,672,383 B2
  • Filed: 01/28/2005
  • Issued: 03/02/2010
  • Est. Priority Date: 09/17/2004
  • Status: Expired due to Fees
First Claim
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1. A method of estimating noise variance, comprising:

  • receiving a signal including an Orthogonal Frequency Division Multiplexing (OFDM) symbol having in-band tones including in-band pilot tones, and band-edge tones including band-edge pilot tones and guard tones;

    estimating an effective noise variance for the in-band tones using the in-band pilot tones and channel estimates for the in-band pilot tones; and

    estimating an effective noise variance for the band-edge tones using the band-edge pilot tones, channel estimates for the band-edge pilot tones, and the guard tones.

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