InterDigital Inc (IDCC)

[Gamco]

United States Patent 7,509,108
Grieco , et al. March 24, 2009

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Method and apparatus for automatic frequency correction with a frequency error signal generated by block correlation of baseband samples with a known code sequence


Abstract
The present invention is related to a method and apparatus for automatic frequency correction of a local oscillator. The apparatus receives a carrier signal. The carrier signal includes a code sequence known to the apparatus. The apparatus downconverts the carrier signal to a baseband signal using the local oscillator. The apparatus performs a block correlation of the samples of the baseband signal with the known code sequence to generate a frequency error signal. The frequency error signal is fed back to the local oscillator to correct the frequency error.


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Inventors: Grieco; Donald M. (Manhassett, NY), Bultan; Aykut (Bayside, NY)
Assignee: InterDigital Technology Corporation (Wilmington, DE)

Appl. No.: 11/983,491
Filed: November 9, 2007

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Related U.S. Patent Documents

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Application Number Filing Date Patent Number Issue Date
11382380 May., 2006 7299023
10977053 Oct., 2004 7058378
60523051 Nov., 2003


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Current U.S. Class: 455/258 ; 375/341; 375/344; 455/255; 455/257
Current International Class: H04B 7/00 (20060101)
Field of Search: 455/255,424,425,456.5,456.6,561,13.2,67.11,63.1,504,506,515,135,125,164.2,164.1,192.1,192.2,182.1,182.2,258,265,257,323 375/208,325,326,339,343,344,354,150 329/302,304,306,308,309,323,358