To reduce signal interference and improve the signal-to-noise ratio in the transmitted signal, the analog signals produced by an ultrasound transducer are promptly digitized. In accordance with the invention, the demodulator is already shielded from the ultrasound transducers, immediately after the preamplifier, which is itself shielded from the ultrasound transducers, by an analog to digital converter, for example.

 
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> Apparatus and method for frequency shifting of a wireless signal and systems using frequency shifting

> Correlation-based motion estimation of object to be imaged

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