Techno Life, Micromax New Version Official Firmware, Winmax official firmware, Nokia Flash File, WhatsApp Messenger, Lenovo, huawei, xiaomi, samsung galaxy

Cari Blog Ini

Diberdayakan oleh Blogger.
Jumat, 27 Desember 2013

SIMULATION OF QUADRATURE MIRROR FILTER

SIMULATION OF QUADRATURE MIRROR FILTER - these days more and more blogs that talk about technology, including blogs Techno Life but we are very experienced in this case because we have been there from a few years ago always present information about techno for you, well now we are about SIMULATION OF QUADRATURE MIRROR FILTER hopefully the information we will convey can answer your question to google, please see:

Articles : SIMULATION OF QUADRATURE MIRROR FILTER
full Link : SIMULATION OF QUADRATURE MIRROR FILTER

You can also see our article on:


SIMULATION OF QUADRATURE MIRROR FILTER

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.





information SIMULATION OF QUADRATURE MIRROR FILTER has been discussed

hopefully the meaning of SIMULATION OF QUADRATURE MIRROR FILTER that we write can be useful for you in adding insight about gadgets.

you just finished reading the article titled SIMULATION OF QUADRATURE MIRROR FILTER if you want to bookmark or share your links use the link https://lifeandeating.blogspot.com/2013/12/simulation-of-quadrature-mirror-filter.html do not forget to go back to this blog if you want to get the latest information about gadgets.

Tag :
Share on Facebook
Share on Twitter
Share on Google+
Tags :

Related : SIMULATION OF QUADRATURE MIRROR FILTER

0 komentar:

Posting Komentar