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锛?/p>
1
锛夋帉鎻℃眰绯荤粺鍝嶅簲鐨勬柟娉?/p>
锛?/p>
2
锛夋帉鎻℃椂鍩熺鏁ｇ郴缁熺殑鏃跺煙鐗规�?/p>
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3
锛夊垎鏋愩�佽瀵熷強妫�楠岀郴缁熺殑绋冲畾鎬?/p>
浜屻�?/p>
鍦ㄦ椂鍩熶腑锛?/p>
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宸茬煡杈撳叆淇″彿
,
鍙互鐢?/p>
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姹傝В銆傚湪璁＄畻鏈轰笂閫傚悎鐢ㄩ�掓帹娉曟眰宸垎鏂圭▼鐨勮В锛屾渶绠�鍗曠殑鏂规硶鏄噰鐢?/p>
MATLAB
璇█鐨勫伐
鍏风鍑芥暟
filter
鍑芥暟銆?/p>
涔熷彲浠ョ敤
MATLAB
璇█鐨勫伐鍏风鍑芥暟
conv
鍑芥暟璁＄畻杈撳叆淇″彿鍜岀郴
缁熺殑鍗曚綅鑴夊啿鍝嶅簲鐨勭嚎鎬у嵎绉紝姹傚嚭绯荤粺鐨勫搷搴斻�?/p>
绯荤粺鐨勭ǔ瀹氭�ф槸鎸囧浠绘剰鏈夌晫鐨勮緭鍏ヤ俊鍙凤紝
绯荤粺閮借兘寰楀埌鏈夌晫鐨勭郴缁熷搷搴斻�?/p>
鎴栬�呯郴缁?/p>
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妫�鏌ョ郴缁熸槸鍚︾ǔ瀹氾紝涓嶅彲鑳芥鏌ョ郴缁熷鎵�鏈夋湁鐣岀殑杈撳叆淇″彿锛岃緭鍑烘槸鍚﹂兘鏄湁鐣岃緭鍑猴紝
鎴栬�呮鏌ョ郴缁熺殑鍗曚綅鑴夊啿鍝嶅簲婊¤冻缁濆鍙拰鐨勬潯浠躲�傚彲琛岀殑鏂规硶鏄湪绯荤粺鐨勮緭鍏ョ鍔犲叆
鍗曚綅闃惰穬搴忓垪锛屽鏋滅郴缁熺殑杈撳嚭瓒嬭繎涓�涓父鏁帮紙鍖呮嫭闆讹級
锛屽氨鍙互鏂畾绯荤粺鏄ǔ瀹氱殑銆傜郴
缁熺殑绋虫�佽緭鍑烘槸鎸囧綋
n
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鐨勫紑濮嬩竴娈电О涓烘殏鎬佹晥搴旓紝闅?/p>
n
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浜屻�佸疄楠屽唴瀹瑰強姝ラ
(1)
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filter
鍑芥暟鎴?/p>
conv
鍑芥暟姹傝В绯荤粺杈撳嚭鍝嶅簲鐨勪富绋嬪簭銆傜▼搴忎腑瑕佹湁缁樺埗淇″彿娉㈠舰鐨勫姛鑳姐�?/p>
绋嬪簭浠ｇ爜
xn=[ones(1,32)];
hn=[0.2 0.2 0.2 0.2 0.2];
yn=conv(hn,xn);
n=0:length(yn)-1;
subplot(2,2,1);stem(n,yn,'.')
title('(a)y(n)
娉㈠舰
');xlabel('n');ylabel('y(n)')
杈撳嚭娉㈠舰
(2)
缁欏畾涓�涓綆閫氭护娉㈠櫒鐨勫樊鍒嗘柟绋嬩负
杈撳叆淇″彿
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8
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n
R
n
x
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鈶犲垎鍒眰鍑虹郴缁熷
)
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R
n
x
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鍜?/p>
)
(
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n
u
n
x
飥?/p>
鐨勫搷搴斿簭鍒楋紝骞剁敾鍑哄叾娉㈠舰銆?/p>
鈶℃眰鍑虹郴缁熺殑鍗曚綅鍐插搷搴旓紝鐢诲嚭鍏舵尝褰€�?/p>
%
鍐呭
1
锛氳皟鐢?/p>
filter
瑙ｅ樊鍒嗘柟绋嬶紝鐢辩郴缁熷
u(n)
鐨勫搷搴斿垽鏂ǔ瀹氭�?/p>
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