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Altera_Forum
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17 years ago

Low Pass IIR filter using cyclone II FPGA

Hi everyone, I hava a task to implement low pass iir filter on cyclone II FPGA. The parameters of filter are the following: fp=5kHz; pass band frequency fs=8kHz; stop band frequency Fs=44k...
Altera_Forum's avatar
Altera_Forum
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17 years ago

Yes, filter is recursive and the 7th order.

b0y(n)=a0x(n)+a1x(n-1)+...+a7x(n-7)+b1y(n-1)+b2y(n-2)+...+b7y(n-7)

I want to know which is the best way to represent coefficients ai, bi, i=0...7?

Maybe like a signed number with a fixed point? And with how many bits? Is it 16bits enough?

Thank you for you effort,

Bojan