Q4.5ʹÓÃϰÌâQ3.50ÖбàдµÄ³ÌÐò£¬·Ö±ð¼ÆËã²¢»³öʽ£¨4.36£©ºÍʽ£¨4.37£©È·¶¨µÄÁ½¸öÂ˲¨Æ÷µÄ³å¼¤ÏìÓ¦ÖеÄǰ100¸öÑù±¾¡£ÌÖÂÛÄãµÄ½á¹û¡£ ʽ£¨4.36£©£º
clf;
num=[0.15 0 -0.15]; den=[1 -0.5 0.7];
L=input('Enter the number of samples L:'); [g t]=impz(num,den,L); stem(t,g);
title(['First',num2str(L),'samples of impulse response']); xlabel('Time Index n'); ylabel('h[n]');
Enter the number of samples L:100
clf;
num=[0.15 0 -0.15]; den=[0.7 -0.5 1];
L=input('Enter the number of samples L:'); [g t]=impz(num,den,L); stem(t,g);
title(['First',num2str(L),'samples of impulse response']); xlabel('Time Index n'); ylabel('h[n]');
Enter the number of samples L:100
Á½Õß·´×ª¡£
Q4.6ʹÓÃzplane·Ö±ðÉú³Éʽ£¨4.36£©ºÍʽ£¨4.37£©È·¶¨µÄÁ½¸öÂ˲¨Æ÷µÄ¼«Áãµãͼ¡£ÌÖÂÛÄãµÄ½á¹û¡£ ʽ£¨4.36£©£ºnum = [0.15 0 -1]; den = [1 -0.5 0.7]; zplane(num,den);
ʽ£¨4.36£©£ºnum = [0.15 0 -1]; den = [0.7 -0.5 1]; zplane(num,den);
Á½ÕßµÄÁãµãÒ»Ñù£¬¼«µãǰÕßÔÚÔ²ÄÚ£¬ºóÕßÔÚÔ²Íâ¡£ Q4.19ÔËÐгÌÐòP4.3£¬Éú³ÉÿһÀàÏßÐÔÏàλÓÐÏ޳弤ÏìÓ¦Â˲¨Æ÷µÄ³å¼¤ÏìÓ¦¡£Ã¿Ò»¸öÓÐÏÞ³å
¼¤ÏìÓ¦Â˲¨Æ÷µÄ³¤¶ÈÊǶàÉÙ£¿ÑéÖ¤³å¼¤ÏìÓ¦ÐòÁеĶԳÆÐÔ¡£½Ó×ÅÑéÖ¤ÕâЩÂ˲¨Æ÷µÄÁãµãλÖá£Ê¹ÓÃMATLAB¼ÆËã²¢»æÖƳöÕâЩÂ˲¨Æ÷µÄÏàλÏìÓ¦£¬ÑéÖ¤ËüÃǵÄÏßÐÔÏàÎ»ÌØÐÔ¡£ÕâЩÂ˲¨Æ÷µÄȺÑӳٵĶàÉÙ£¿ £¨£±£©
³¤¶È·Ö±ðÊÇ9,10,9,10£» £¨£²£©