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Hi
I would like to implement in C an envelope detector filter.
The input is a WORD (16 bit) array representing the voice echo signal of a transducer
transmitting in 50 KHz (what should be the size?) It also should represent 10 meters distance.
The output is an array containing the signal's envelope
The Filter is: 
envelope detection = sqrt (Hilbert transform^2 + Signal^2)
I will appreciate it very much if somebody could advice and also send me a code implementation
(or pseudo code).

Thanks
Eyal
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