1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
|
function [z, p, g] = ellipap (n, Rp, Rs)
//Designs a lowpass analog elliptic filter.
//Calling Sequence
//[z, p, g] = ellipap (n, Rp, Rs)
//[z, p] = ellipap (n, Rp, Rs)
//z = ellipap (n, Rp, Rs)
//Parameters
//n: Filter Order
//Rp: Peak-to-peak passband ripple
//Rs: Stopband attenuation
//Description
//This is an Octave function.
//It designs a lowpass analog elliptic filter of nth order, with a Peak-to-peak passband ripple of Rp and a stopband attenuation of Rs.
//Examples
//[z, p, g] = ellipap (5, 10, 10)
//z =
//
// 0.0000 + 2.5546i 0.0000 + 1.6835i -0.0000 - 2.5546i -0.0000 - 1.6835i
//
//p =
//
// -0.05243 + 0.63524i -0.01633 + 0.96289i -0.05243 - 0.63524i -0.01633 - 0.96289i -0.07369 + 0.00000i
//
//g = 0.0015012
funcprot(0);
lhs = argn(1)
rhs = argn(2)
if (rhs < 3 | rhs > 3)
error("Wrong number of input arguments.")
end
select(rhs)
case 3 then
if(lhs==1)
z = callOctave("ellipap", n, Rp, Rs)
elseif(lhs==2)
[z, p] = callOctave("ellipap", n, Rp, Rs)
elseif(lhs==3)
[z, p, g] = callOctave("ellipap", n, Rp, Rs)
else
error("Wrong number of output argments.")
end
end
endfunction
|
