Re: How to write a HighPass procedure?



gpdonnarumma@xxxxxxxxx wrote:
Hi,
I have do write a procedure in Delphi that take an array of samples and

filters it.

The filter I've to do is HighPass to cut out low frequency (1 to 100
selectable) from my signal.

My signal is sampled at 50Khz for a max of 500 millisec.

Do you know where I can find the code or something similar to quickly
implement this function in my software?


Simplest FIR:

Compute the moving average at the current sample on the length of +/- half period of cutoff frequency. Substract this moving average from the current sample. Take the result to the output. Proceed to the next sample.


Vladimir Vassilevsky

DSP and Mixed Signal Design Consultant

http://www.abvolt.com
.

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