DETERMINING DOPPLER SHIFT IN AN AUDIO CHIRP SIGNAL
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United States of America Patent
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Issued Date -
Oct 20, 2016
app pub date -
Apr 14, 2015
filing date -
Apr 14, 2015
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Abandoned
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Abstract
A method of determining Doppler shift of a received audio chirp signal, the received audio chirp signal having a receive frequency profile Doppler shifted relative to a transmit frequency profile that the received audio chirp signal was transmitted with. The method comprises: correlating the received audio chirp signal with a replica audio chirp signal to form a correlation output; identifying a relative alignment of the received audio chirp signal and the replica audio chirp signal to be that at which the received audio chirp signal and the replica audio chirp signal are most highly correlated; and determining the Doppler shift to be that corresponding to the identified relative alignment.
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