cheb1mag - response of Chebyshev type 1 filter

Calling Sequence

[h2]=cheb1mag(n,omegac,epsilon,sample)

Parameters

• n : integer : filter order
• omegac : real : cut-off frequency
• epsilon : real : ripple in pass band
• sample : vector of frequencies where cheb1mag is evaluated
• h2 : Chebyshev I filter values at sample points

Description

Square magnitude response of a type 1 Chebyshev filter.

omegac =passband edge.

epsilon : such that 1/(1+epsilon^2) =passband ripple.

sample : vector of frequencies where the square magnitude is desired.

Examples

//Chebyshev; ripple in the passband
n=13;epsilon=0.2;omegac=3;sample=0:0.05:10;
h=cheb1mag(n,omegac,epsilon,sample);
plot2d(sample,h)
xtitle('','frequencies','magnitude')
 
  

See Also

buttmag ,