US 9,239,376 C1 (12,709th)
Doppler aided inertial navigation
Michael B. Mathews, Kirkland, WA (US); and Peter F. MacDoran, Woodinville, WA (US)
Filed by Michael B. Mathews, Kirkland, WA (US); and Peter F. MacDoran, Woodinville, WA (US)
Assigned to MDSP TECHNOLOGIES, LLC, Dover, DE (US)
Reexamination Request No. 90/015,299, Sep. 12, 2023.
Reexamination Certificate for Patent 9,239,376, issued Jan. 19, 2016, Appl. No. 13/269,426, Oct. 7, 2011.
Claims priority of provisional application 61/391,517, filed on Oct. 8, 2010.
Ex Parte Reexamination Certificate issued on Sep. 19, 2024.
Int. Cl. G01S 11/10 (2006.01); G01C 21/16 (2006.01); G01S 5/02 (2010.01)
CPC G01S 11/10 (2013.01) [G01C 21/1654 (2020.08); G01S 5/0263 (2013.01)]
OG exemplary drawing
AS A RESULT OF REEXAMINATION, IT HAS BEEN DETERMINED THAT:
Claims 1-3, 5, 8 and 9 are cancelled.
Claims 4 and 6-7 were not reexamined.
4. The system of claim 1, wherein the signal processor is configured to transform the reflected radio frequency emission into Doppler frequency observables using Doppler broadening detection by
transforming the radio frequency emission to produce frequency spectral data using a Fourier transformation; and
determining an amplitude distribution within the frequency spectral data of the at least one radio frequency emission, wherein the amplitude distribution is a function of the multipath environment and the Doppler frequency observables.