Patents by Inventor Shanmugavel Sivagnanavelu

Shanmugavel Sivagnanavelu has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Apparatus and method for optimization of carrier recovery in a receiver of a communication system
    Patent number: 8259874
    Abstract: An apparatus and method to optimize recovery of the carrier frequency performs independent optimization of frequency capture range and carrier frequency estimation accuracy. A multi-correlator selects a frequency-shifted version of a signal of interest, extracted from a received signal, to output a coarse frequency-shifted version of the signal of interest. A fine frequency estimator shifts a frequency of the coarse frequency-shifted version of the signal of interest, based on a frequency corresponding to the spectral peak of the coarse frequency-shifted version of the signal of interest, and generates a fine frequency-shifted version of the signal of interest.
    Type: Grant
    Filed: July 31, 2009
    Date of Patent: September 4, 2012
    Assignee: VT Idirect, Inc.
    Inventors: Ronggang Qi, Christopher D. Gregory, Baoyan Ding, Shanmugavel Sivagnanavelu