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Altera_Forum's avatar
Altera_Forum
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11 years ago

problem with FIR IP

FIR IP filter output waveform shake up and down , Input signal contains the useful signal and the noise signals , so the frequency of the noise signal may be greater than half of the sam...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
11 years ago

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So you have two single tones coming from ADC; one at 1Hz, and one at 1KHz and you want to filter off the 1Khz and pass the 1 Hz

You haven't said anything about Fs of signal itself. You have chosen Fs of 1KHz first then FS of 5KHz. You can't just pick a value. Your Fs must be that of input signal and should be same as ADC Fs unless you have done downsampling which I doubt.

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The Fs of signal itself is 25MHZ .

This example is for testing the function of the FIR IP filter , and I want to know how to make a low-pass FIR IP filter with high sampling frequency signal ?

thanks a lot !!!