Prev: Catalytic Fixed-Point Toolbox
Next: Using mpcmove from embedded matlab R14
From: Pete Fraser on 1 Jul 2010 21:48
"Vladimir Vassilevsky" <nospam(a)nowhere.com> wrote in message
news:OP-dnf44bO7hJ7HRnZ2dnUVZ_t-dnZ2d(a)giganews.com...

> Check the FDLS method of Greg Berchin. That is one of the most elegant
> methods of designing to a prototype.

I think I must be doing something dumb.
I started off with a really simple half-band FIR, just
as a test.

The input file was:

11 100000
0 1 0 1
5000 1 -72 1
10000 1 -144 1
15000 1 -216 1
20000 1 -288 1
25000 .5 -360 1
30000 0 -432 1
35000 0 -504 1
40000 0 -576 1
45000 0 -648 1
50000 0 -720 1


N=8
D=0
delta=0

and I get B =


-3.55068459956424e-018
-0.0454056666613377
2.42666919829597e-016
0.292936161872951
0.5
0.326331656363899
-2.00804673259988e-016
-0.0874864446451108
-1.76118166519034e-017

so it's doing a lot of things right.

The center is 0.5, four are close to 0,
but 0.29 is not 0.32, and -0.04 is not -0.08.

What am I doing wrong?

Thanks

Pete


 | 
Pages: 1
Prev: Catalytic Fixed-Point Toolbox
Next: Using mpcmove from embedded matlab R14