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Filtering Algorithm Selection

Started by Vinu V March 3, 2004
Hi,

I am designing an obstacle detection system using SONAR. I am using a 50Khz
signal for transmiting. The application needs to determine the exact
frequency of the echo received from the obstacles. The expected range of the
echo signals is 45 - 55 Khz and I need an accuracy of upto 90Hz. Could anyone
suggest me which algorithm is good for such situations and how can I achieve
an accuracy of around 90Hz.

Thanks and Regards,
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