Patent ID: 8411530

Claim:
An acoustic Doppler system comprising: an acoustic subsystem controller operatively connected to a plurality of acoustic transceivers; a first of the plurality of acoustic transceivers, operating at a first acoustic frequency, which is operatively connected to a first group of at least one transducer; and a second of the plurality of acoustic transceivers, operating at a second acoustic frequency, which is operatively connected to a second group of at least one transducer; wherein the acoustic subsystem controller comprises a digital circuit configured to sample analog signals received from each transducer of the first group of at least one transducer and each transducer of the second group of at least one transducer, the digital circuit sampling the analog signal received from a sampled transducer in a sampling pair having a pair-wise sampling frequency that is four times the operating frequency of the one of the plurality of acoustic transceivers operatively connected to the sampled transducer.