Patents by Inventor Jennifer Y. Vollbrecht

Jennifer Y. Vollbrecht 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).

  • Patent number: 6922103
    Abstract: A method and apparatus for reducing intermodulation distortion is disclosed. In one embodiment, the method comprises the steps of accepting a sampled input signal V(t) wherein the input signal V(t) comprises a plurality of peaks; determining n peaks Vp1,Vp2, . . . Vpn of the sampled input signal V(t) exceeding a clip value Vclip at times t1, t2, . . . tn; and modifying the sampled input signal V(t) by weighting the n peaks Vp1,Vp2, . . . ,Vpn exceeding the clip value Vclip of the sampled input signal V(t) by a function b(t) wherein b(t) is either a hard limiting function or b(t)=f(a1, a2, . . . an;t?tp1,t?tp2, . . . t?tpn), wherein a1,a2, . . . an are weight values corresponding to the n peaks Vp1, Vp2, . . . Vpn, and f(t?tp1,t?tp2, . . . t?tpn) is a smooth shaping function. Intermodulation performance is then selectively improved in selected sub-bands by notch filtering prior to application to the non-linearity.
    Type: Grant
    Filed: May 21, 2003
    Date of Patent: July 26, 2005
    Assignee: The Boeing Company
    Inventors: Peter Y. Cheung, David L. Crampton, Jennifer Y. Vollbrecht, Kuang Yung Liu, Lauriston Chin Wah
  • Publication number: 20040232983
    Abstract: A method and apparatus for reducing intermodulation distortion is disclosed. In one embodiment, the method comprises the steps of accepting a sampled input signal V(t) wherein the input signal V(t) comprises a plurality of peaks; determining n peaks Vp1,Vp2, . . . ,Vpn of the sampled input signal V(t) exceeding a clip value Vclip at times t1,t2, . . . ,tn; and modifying the sampled input signal V(t) by weighting the n peaks Vp1,Vp2, . . . ,Vpn exceeding the clip value Vclip of the sampled input signal V(t) by a function b(t) wherein b(t) is either a hard limiting function or b(t)=ƒ(a1,a2, . . . an;t-tp1,t-tp2, . . . t-tpn), wherein a1,a2, . . . an are weight values corresponding to the n peaks Vp1,Vp2, . . . ,Vpn, and ƒ(t-tp1,t-tp2, . . . t-tpn) is a smooth shaping function. Intermodulation performance is then selectively improved in selected sub-bands by notch filtering prior to application to the non-linearity.
    Type: Application
    Filed: May 21, 2003
    Publication date: November 25, 2004
    Applicant: THE BOEING COMPANY
    Inventors: Peter Y. Cheung, David L. Crampton, Jennifer Y. Vollbrecht, Kuang Yung Liu, Lauriston Chin Wah