SIMULATION OF QUADRATURE MIRROR FILTER
AIM:
To simulate the frequency response of quadrature mirror for a two channel filter band.
THEORY:
The QMF filter is used in the sub-band coding. This filter can be used for reducing aliasing. This is a multirate digital filter structure that employes 2 decimeter in signal synthesis section. The low pass and high pass filters in the analysis section have impulse response filters (n) and (n) respectively.
Similarly the low pass filter and high pass filters contained in the synthesis section have impulse response filters (n) and (n) respectively. To reduce aliasing the synthesis section have impulse response (n) and (n) respectively,
(ω)= (ω)
(ω)=- (ω-π)
Since (ω) and (ω)is a mirror image filters
H0(ω)=H(ω)
H1(ω)=H(ω- π)
G0(ω)=2H(ω)
This is due to the above design, aliasing effects cancels.
ALGORITHM:
1. Generate the low pass filter
2. Generate the high pass filter
3. Compute the gain response of two filters
4. Plot the gain response of two filters.
QUADRATURE MIRROR FILTER:
X(ω)
FILTER CHARACTERISTICS FOR SUB-BAND CODING
Gain
H0 (ω) H1 (ω)
PROGRAM
####################################################
clc;
clear all;
%generation of complimentary lpf
b1=fir1(50,0.5);
%generation of complimentary hpf
l=length(b1);
for k=1:l
b2(k)=((-1)^k)*b1(k)
end
%computation of gain response of two filters
[H1Z,W]=freqZ(b1,1,256);
H1=abs(H1Z);
g1=20*log10(H1);
[H2Z,W]=freqZ(b2,1,256);
H2=abs(H2Z);
g2=20*log10(H2);
%PLOT OF GAIN RESPONSE OF TWO FILTERS
plot((W*180)/pi,g1,'-',(W*180)/pi,g2,'-');
grid on
xlabel('normalized freq');
ylabel('gain');
#############################################################
RESULT:
Thus the frequency response of quadrature mirror filter for a two channel filter bands was simulated.
BalasHapuspug puppies for sale,pug puppies for sale near me
teacup pugs for sale,teacup pugs,teacup pug puppies for sale,teacup pug for sale near me,pug for sale near me,pug puppies for sale under,teacup pugs,pug puppies near me,teacup pugs,teacup pug puppies for sale,pug puppy for sale,mini pug,baby pugs for sale,pug breeders near me,pugs puppies for sale,black pug puppies for sale,miniature pug,pug puppies,pugs for sale near me,pugs for sale near me,pugs puppies,teacup pug puppies for sale,pugs for sale,baby pugs for sale
Pug pupies for sale
pug puppies for sale near me
pug puppy for sale near me
teacup puppies for sale near me
Pug puppies for sale
pugs for sale
french bulldog puppies for sale
French Bulldog Puppy for sale near me
BalasHapusYeni yayınlanmış olan en güncel ve en özel pornoların pornolar olduğunu biliyor olmanız güzel değil mi ?