Design Using Window Functions

소개글

DSP - 윈도우 함수를 만들어야하는 리포트(MATLAB)
(Rectangular,Han,Hamming,Blackman,Parks-McClellan Design,Raised-Cosine Half-Band Filters)

목차

1. Rectangular Window
2. Han Window
3. Hamming Window
4. Blackman Window
5. Parks-McClellan Design
6. Raised-Cosine Half-Band Filters

본문내용

Design Using Window Functions

1. Rectangular Window

clear all;
close all;
clf;

%[[----------- 싱크함수 -------------

%----------------------------------]]

%[[------- Rectangular Window -------

%----------------------------------]]

%[[------- LP (Rectangular) ---------
w_rect = rect;
h = hd .* w_rect;
%----------------------------------]]

subplot(2,2,1), stem(tot_index,rect);
title(Rectangular window);
xlabel(n ->);

subplot(2,2,2), stem(tot_index,h);
title(LP impulse response (rect));
xlabel(n ->`);

[H,w]=freqz(h,[1],1000,whole);
H=(H(1:1:501));w=(w(1:1:501));
mag=abs(H);
db=20*log10((mag+eps)/max(mag));

subplot(2,2,3); plot(w/(pi),db);title(Frequencey response in dB);
axis([0 0.5 -100 10]);xlabel(w/pi);

subplot(2,2,4); plot(w/(pi),db);title(`Pass-band(in dB));
axis([0 0.5 -1.5 1]);xlabel(w/pi);

참고 자료

Digital Signal Processing Using MATLAB V.4