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doppler shift measurement for sound

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LAN_403

IamSmooth

Sat Apr 09 2011, 07:11PM

Registered Member #190 Joined: Fri Feb 17 2006, 12:00AM
Location:
Posts: 1567

Does anyone know how the actual shift frequency is measured for sound? If one has a source at 3.5Mhz and the shift frequency is 7Khz, how is the latter determined? Is there an algorithm that compares the phase of the source and return signal?

Bored Chemist

Sat Apr 09 2011, 07:14PM

Registered Member #193 Joined: Fri Feb 17 2006, 07:04AM
Location: sheffield
Posts: 1022

Mix them and low pass filter the output- you will get the 7KHz directly and if the 3.5MHz signal drifts a bit it doesn't matter much.

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