?? ex_07_06_1.m
字號:
% ex_07_06_1.m : 習(xí)題 7.6
clear all;
N=31;
wr=boxcar(N); % for boxcar window;
[WR,f]=freqz(wr,1,256,'whole',1);
WR=20*log10(abs(WR)/abs(WR(1)));
wt=triang(N); % for triangle window
[WT,f]=freqz(wt,1,256,'whole',1);
WT=20*log10(abs(WT)/abs(WT(1)));
wh=hamming(N);% for Hamming window;
[WH,f]=freqz(wh,1,256,'whole',1);
f1=f-0.5;plot(f1,fftshift(WH))
WH=20*log10(abs(WH)/abs(WH(1)));
t=0:N-1;f=f-0.5;
%
subplot(321);stem(t,wr,'.k');grid on;
subplot(322);plot(f,fftshift(WR));grid on;
subplot(323);stem(t,wt,'.k');grid on;
subplot(324);plot(f,fftshift(WT));grid on;
subplot(325);stem(t,wh,'.k');grid on;
subplot(326);plot(f,fftshift(WH));grid on;
?? 快捷鍵說明
復(fù)制代碼
Ctrl + C
搜索代碼
Ctrl + F
全屏模式
F11
切換主題
Ctrl + Shift + D
顯示快捷鍵
?
增大字號
Ctrl + =
減小字號
Ctrl + -