Communications – electrical: acoustic wave systems and devices – Echo systems – Speed determination
Reexamination Certificate
2007-10-23
2007-10-23
Pihulic, Daniel (Department: 3662)
Communications, electrical: acoustic wave systems and devices
Echo systems
Speed determination
Reexamination Certificate
active
11176674
ABSTRACT:
The present invention is directed to a method of allowing a computational load caused by the implementation of conventional signal processing methods operating by multicopy correlation, by simultaneous correlation of the spectrum of the received signal to copies of the signal, each of the copies having a different Doppler shift. The multicopy correlation operation is a time-frequency transformation of the received signal. Synthetic spectra are found by selection of spectral lines and concatenation, starting from the spectrum of the received signal. An inter-spectral product is computed, in other words by the product of each synthetic spectrum with the concatenated conjugate spectrum of the corresponding Doppler copy. A frequency-time transformation of the inter-spectral products is performed.
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Alinat Pierre
Deruaz Laurent
Doisy Yves
Masoni Marc
Lowe Hauptman & Berner LLP
Pihulic Daniel
Thales
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