United States Patent 7,778,619
Bultan , et al. August 17, 2010
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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: Bultan; Aykut (Bayside, NY), Grieco; Donald M. (Manhasset, NY)
Assignee: InterDigital Technology Corporation (Wilmington, DE)
Appl. No.: 12/408,285
Filed: March 20, 2009
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Related U.S. Patent Documents
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Application Number Filing Date Patent Number Issue Date
11983491 Nov., 2007 7509108
11382380 Nov., 2007 7299023
10977053 Jun., 2006 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: 455/424,425,456.5,456.6,561,550.1,575.1,458,258,255,265,296,63.1,67.11,75,136,173.1,182.1,182.2,192.2,208 375/317,148,147,142,149,130,150,344,365,376,362 370/342,204,324 342/199,189,192,194
