鍗楁槍澶у瀹為獙鎶ュ憡
瀛︾敓濮撳悕
锛?/p>
瀛?/p>
鍙?/p>
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涓撲笟鐝骇锛?/p>
瀹為獙绫诲瀷锛?/p>
鈻?/p>
楠岃瘉
鈻?/p>
缁煎悎
鈻?/p>
璁捐
鈻?/p>
鍒涙柊
瀹為獙鏃ユ湡锛?/p>
瀹為獙鎴愮哗锛?/p>
绗笁绔狅細绂绘暎鏃堕棿淇″彿鐨勯鍩熷垎鏋?/p>
涓�銆佸疄楠岀洰鐨勶細
1
銆?/p>
瀛︿細鐢?/p>
MATLAB
鍦ㄦ椂鍩熶腑浜х敓涓�浜涘熀鏈殑绂绘暎鏃堕棿淇″彿锛?/p>
骞跺杩欎簺淇″彿杩涜涓�
浜涘熀鏈殑杩愮畻銆?/p>
2
銆佸浼氫娇鐢ㄥ熀鏈殑
MATLAB
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浜屻�佸疄楠岃姹傦細
1
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2
銆佸洖绛斾功鍚庣粰鍑虹殑闂銆?/p>
3
銆佸疄楠屾姤鍛婁粎鍥炵瓟鍋舵暟淇″彿鐨勪緥瀛愩�?/p>
涓夈�佸疄楠岀▼搴忓強缁撴灉
Q3.2
杩愯绋嬪簭
P3.1
姹傜鏁ｆ椂闂村倕绔嬪彾鍙樻崲鐨勫疄閮ㄣ�佽櫄閮ㄤ互鍙婂箙搴﹀拰鐩镐綅璋卞垪銆傜鏁ｆ椂闂村倕
绔嬪彾鍙樻崲鏄?/p>
蠅
鐨勫懆鏈熷嚱鏁板悧锛熻嫢鏄紝鍛ㄦ湡鏄灏戯紵鎻忚堪杩欏洓涓浘褰㈢殑瀵圭О鎬с�?/p>
绋嬪簭锛?/p>
%
绂绘暎鏃堕棿鍌呯珛鍙跺彉鎹㈢殑棰戠巼鏍锋湰
w=-4*pi:8*pi/511:4*pi;
num=[2 1];den=[1 -0.6];
h=freqz(num,den,w);
%plot the DTFT
subplot(2,1,1)
plot(w/pi,real(h));grid
title('H(e^|j\omegal|)
鐨勫疄閮?/p>
')
xlabel('\omega/\pi');
ylabel('
鎸箙
');
subplot(2,1,2)
plot(w/pi,imag(h));grid
title('H(e^|j\omegal|)
鐨勮櫄閮?/p>
')
xlabel('\omega/\pi');
ylabel('
鎸箙
');
pause%
鏆傚仠绛夊緟鎸囦护鎵ц鍚庨潰绋嬪簭
subplot(2,1,1)
plot(w/pi,abs(h));grid
title('|H(e^|j\omega|)|
骞呭害璋?/p>
')
xlabel('\omega/\pi');
ylabel('
鎸箙
');
subplot(2,1,2)
plot(w/pi,angle(h));grid
title('
鐩镐綅璋?/p>
arg[H(e^|j\omega|)]')