I want to it clear that I am a mechanical engineer and so my knowledge on electronics and signal processing is limited. I am working in a hydrophone system. My job is to find the position of an underwater pinger with an AUV. The pinger sends the sound at a frequency of 45kHz and my hydrophone send signals in range of 0-5mV. I have doubts regarding what implementation of the anti-alisiang filter, signal conditioning, ADC conversion and digital filters for removing noise in terms of hardware. I do know that the sampling frequency should be minimal double that of the signal but that us not enough and aiming at 1MHz I am struggling to find a microcontroller board with such specs. Also, I need simultaneously sampling of two hydrophones depending on the difference in the time the signal takes to reach the two hydrophones, I would calculate the angle at which the pinger is present. Basically, I need help figuring out the hardware required to get such results.