robin/two_pole_dc_pass
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

some zeros filters

Browse Source
This commit is contained in:
Robin. P. Clark 2019-09-16 14:30:42 +01:00
parent 211544b0b8
commit 756de6fee0
1 changed files with 32 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

41
freq_analysis.c
View File

@ -94,16 +94,39 @@ main () {
} }
// simple lag filter // simple lag filter
// xz[0] = 0.125; xz[0] = 0.125;
// yp[0] = 1.0;
// yp[1] = -0.875;
//
//
//simple 7/8th lag filter squared
xz[0] = (0.125*0.125);
yp[0] = 1.0; yp[0] = 1.0;
yp[1] = -(2.0*0.875); yp[1] = -0.875;
yp[2] = (0.875*0.875);
// simple 7/8th lag filter squared
//
// xz[0] = (0.125*0.125);
// yp[0] = 1.0;
// yp[1] = -(2.0*0.875);
// yp[2] = (0.875*0.875);
// simple bandpass
// (Z-1)(Z+1) = Z^2-1
// xz[0] = 1.0;
// xz[1] = 0.0;
// xz[2] = -1.0;
// yp[0] = 1.0;
// peaky x4 bandpass, no d.c. no high freq near nyquist.
// (Z^2-1)^2
//
// xz[0] = 1.0;
// xz[1] = 0.0;
// xz[2] = -2.0;
// xz[3] = 0.0;
// xz[4] = 1.0;
// yp[0] = 1.0;
// yp[1] = 0.0;
// yp[2] = 0.0;
//
for (i=0;i<NYQUIST;i++) { for (i=0;i<NYQUIST;i++) {