銆婁俊鍙蜂笌绯荤粺銆嬭绠楁満瀹為獙浣滀笟
浠跨湡瀹為獙锛?/p>
淇″彿涓?/p>
LTI
绯荤粺鐨勬椂棰戝煙鍒嗘瀽
1
銆佸疄楠岀洰鐨?/p>
1
锛夌啛鎮夊拰鎺屾彙瀹炵幇甯哥敤淇″彿鐨勪骇鐢熸柟娉曪紱
锛?/p>
2
锛夌悊瑙ｇ郴缁熺殑鍗曚綅鍐叉縺鍝嶅簲鐨勬蹇碉紝
LTI
绯荤粺鐨勫嵎绉〃杈惧紡鍙婂叾鐗╃悊鎰忎箟锛屽嵎绉?/p>
鐨勮绠楁柟娉曪紱
3
锛夌悊瑙ｅ吀鍨嬩俊鍙风殑棰戣氨鐗瑰緛锛?/p>
4
锛夌悊瑙ｇ郴缁熺殑棰戠巼鍝嶅簲鐨勬蹇靛強鍏剁墿鐞嗘剰涔夛紝鐞嗚В鍏锋湁涓嶅悓棰戠巼鍝嶅簲鐗规�х殑婊?/p>
娉㈠櫒瀵逛俊鍙风殑婊ゆ尝浣滅敤锛?/p>
5
锛夊浼氬埄鐢ㄧ紪绋嬪疄鐜板嵎绉互姹傝В绯荤粺鍝嶅簲锛屽苟缁樺埗鐩稿簲鏇茬嚎锛?/p>
6
锛夊浼氬埄鐢ㄧ紪绋嬪疄鐜颁竴浜涘吀鍨嬩俊鍙风殑棰戣氨鍒嗘瀽锛屽苟缁樺埗鐩稿簲鏇茬嚎銆?/p>
2
銆佸疄楠屽唴瀹?/p>
宸茬煡涓�
LTI
绯荤粺濡備笅
:
1
锛?/p>
缂栫▼浜х敓浠ヤ笅涓変釜姝ｅ鸡淇″彿锛屽苟鐢诲嚭娉㈠舰鍥俱�?/p>
1
1
2
2
3
1
2
[
]
cos(2
),
[
]
cos(2
),
[
]
[
] +
[
],
x
n
f
n
x
n
f
n
x
n
x
n
x
n
飦?/p>
飦?/p>
飥?/p>
飥?/p>
飥?/p>
鍏朵腑
f1=
1/
8
,f2=
5
/
8
锛?/p>
2
锛?/p>
缂栫▼璁＄畻涓嬮潰鍗风Н锛?/p>
宸茬煡
h
1
[n]={
0.0031,0.0044,
-0.0031,
-0.0272,-0.0346,0.0374,
0.1921,
0.3279
0.3279,0.1921,0.0374,-0.0346,-0.0272,-0.0031, 0.0044,0.0031 }
锛?/p>
n=0,1,...,15
锛?/p>
h
2
[n]= {-0.0238,0.0562,-0.0575,-0.1302,0.5252, -0.6842,-0.3129,5.6197,5.6197,
-0.3129,-0.6842,0.5252,-0.1302,-0.0575,0.0562,-0.0238}, n=0,1,...,15
銆?/p>
a
銆?/p>
褰?/p>
h
[n]=
h
1
[n]
鏃讹紝
杈撳叆鍒嗗埆涓?/p>
x
1
[n],
x
2
[n]
鍜?/p>
x
3
[n]
鏃剁郴缁熺殑杈撳嚭
y[n],
骞剁敾鍑?
娉㈠舰鍥俱�?/p>
b
銆佸綋
h
[n]=
h
2
[n]
鏃讹紝杈撳叆鍒嗗埆涓?/p>
x
1
[n],
x
2
[n]
鍜?/p>
x
3
[n]
鏃剁郴缁熺殑杈撳嚭
y[n],
骞剁敾
鍑烘尝褰㈠浘銆?/p>
3
锛?/p>
缂栫▼瀹炵幇浠ヤ笅淇″彿鐨勯璋卞垎鏋愶細
a
銆佽緭鍏ヤ俊鍙?/p>
x
1
[n],
x
2
[n]
鍜?/p>
x
3
[n]
鐨勯璋憋紝骞剁敾鍑洪璋卞浘锛?/p>
b
銆?/p>
鍐叉縺鍝嶅簲
h
[n]=
h
1
[n]
鏃?/p>
h
[n]
鐨勯璋憋紝
涓夌杈撳叆淇″彿涓嬭緭鍑?/p>
y[n]
鐨勯璋憋紝
骞?/p>
鐢诲嚭
h
[n]
鍜岃緭鍑轰俊鍙风殑棰戣氨鍥撅紱
c
銆?/p>
鍐叉縺鍝嶅簲
h
[n]=
h
2
[n]
鏃?/p>
h
[n
鐨勯璋憋紝
涓夌杈撳叆淇″彿涓嬭緭鍑?/p>
y[n]
鐨勯璋憋紝
骞?/p>
鐢诲嚭
h
[n]
鍜岃緭鍑轰俊鍙风殑棰戣氨鍥俱�?/p>
4
锛夋牴鎹緭鍏ヤ俊鍙枫�?/p>
h
[n]
鍜岃緭鍑轰俊鍙风殑棰戣氨锛岄獙璇佽緭鍑轰俊鍙风殑棰戣氨涓?/p>
杈撳叆淇″彿銆?/p>
h
[n]
鐨勯璋卞叧绯伙紙鎴栧嵎绉�ц川锛?/p>
锛屽嵆
鏄惁婊¤冻
(e
)
(e
)
(e
)
j
j
j
Y
X
H
飦?/p>
飦?/p>
飦?/p>
飥?/p>
銆?/p>
h
[n]
y
[n]
x
[n]