hello everyone;
i'm trying to implement lattice FIR filter and RII lattice filter in c.
my question is how to make the first g(n-1), some one can help me please! i know that z-1 represente a delay time so how can i program it ?, I thought to take each time the previous sampler, but it will not work for the first samples because we will have negative values
you can find the algorithm here
https://www.keil.com/pack/doc/CMSIS/DSP/html/group__FIR__Lattice.html
thank you peter for your answer;
I tried to improve the program, I compiled it and there is no error here the program:
#include
#include
#include
/*********************************************/
/*Lattice Fir filter */
/* */
/*fn(0)=g(0)=x(0) */
/*fn_i(n) = fn_i_1(n)+k(i)*g_i_1(n_1) i=1..M */
/*g_i(n) = k(i)*fn_i_1(n)+g_i_1(n_1) i=1..M */
/*y(n)= f_M(n) */
/* */
/*********************************************/
void LatticeFIR (float *x, float *y, float *k, short p)
{
float *fn;
float *g;
short N;
short i,j;
y=0;
for (j=1; j< p; j++)
for (i=1;i
You are totally right.
What I did is of anything!
I will redo all the program, now, I am familiarizing with the pointers.
thank you Peter !
hello peter;
i have just one question, can explain to me how programing z-1 in C. I've tried to compute the previous sample for each iteration, but with the M'th first samples i have a negatives values.
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