Written by Tom on Monday 09/04/07
This is a simple 4 tap FIR. This is a dedicated filter. A general purpose filter will be worked on later.
I don’t know a lot about DSP so just got the example from "Circuit Design with VHDL" by Volnei A. Pedroni, working with GHDL.
The basic formula is below.
y(n) = c_{0}x(n) + c_{1}x(n1)+...+c_{k}x(nk) And can be expressed as y(n) = ^{m}(sigma)_{k=0} c_{k}x(nk) where y(n) is the output for n m is the number of coef/Taps in this case it should be m1 as the arrays are index from 0 k is the index to start from c is the array of coef x(nk) is the input for n
The above formula was implemented in this project.
Download the project from here.
GTKWaveSignals.jpg contains the simulated signals.
Use the go.bat to compile and run GTKWave.
