1
瀹為獙鍥?/p>
鐢ㄧ獥鍑芥暟娉曡璁?/p>
FIR
婊ゆ尝鍣?/p>
涓�銆佸疄楠岀洰鐨?/p>
1
銆佺啛鎮?/p>
FIR
婊ゆ尝鍣ㄨ璁＄殑鍩烘湰鏂规硶銆?/p>
2
銆佹帉鎻＄敤鎴风獥鍑芥暟璁捐
FIR
鏁板瓧婊ゆ尝鍣ㄧ殑鍘熺悊鍙婃柟娉曪紝鐔熸倝鐩稿簲鐨勮绠楁満楂樼骇璇█缂栫▼銆?/p>
3
銆佺啛鎮夌嚎鎬х浉浣?/p>
FIR
婊ゆ尝鍣ㄧ殑骞呴鐗规�у拰鐩镐綅鐗规�с�?/p>
4
銆佷簡瑙ｅ悇绉嶄笉鍚岀獥鍑芥暟瀵规护娉㈠櫒鎬ц兘鐨勫搷搴斻�?/p>
浜屻�佸疄楠屽師鐞嗗拰鏂规硶
锛堜竴锛?/p>
FIR
婊ゆ尝鍣ㄧ殑璁捐
FIR
婊ゆ尝鍣ㄥ叿鏈変弗鏍肩殑鐩镐綅鐗规�э紝杩欏浜庤闊充俊鍙峰鐞嗗拰鏁版嵁浼犺緭鏄緢閲嶈鐨勩�傜洰鍓?/p>
FIR
婊ゆ尝
鍣ㄧ殑璁捐鏂规硶涓昏鏈変笁绉嶏細绐楀嚱鏁版硶銆侀鐜囧彇鏍锋硶鍜屽垏姣旈洩澶瓑娉㈢汗閫艰繎鐨勬渶浼樺寲璁捐鏂规硶銆?/p>
鏈疄楠屼腑鐨勭獥鍑芥暟娉曟瘮杈冪畝鍗曪紝鍙簲鐢ㄧ幇鎴愮殑绐楀嚱鏁板叕寮忥紝鍦ㄦ妧鏈寚鏍囪姹備笉楂樼殑鏃跺�欐槸姣旇緝
鐏垫椿鏂逛究鐨勩�傚畠鏄粠鏃跺煙鍑哄彂锛岀敤涓�涓獥鍑芥暟鎴彇涓�涓悊鎯崇殑
)
(
n
h
d
寰楀埌
h(n)
锛屼互鏈夐檺闀垮簭鍒?/p>
h(n)
杩戜技鐞嗘兂鐨?/p>
)
(
n
h
d
锛?/p>
濡傛灉浠庨鍩熷嚭鍙戯紝
鐢ㄧ悊鎯崇殑
)
(
jw
d
e
h
鍦ㄥ崟浣嶅渾涓婄瓑瑙掑害鍙栨牱寰楀埌
H
锛?/p>
k
锛?/p>
锛?/p>
鏍规嵁
h(k)
寰楀埌
H(z)
灏嗛�艰繎鐞嗘兂鐨?/p>
)
(
z
H
d
杩欏氨鏄鐜囧彇鏍锋硶銆?/p>
锛堜簩锛夌獥鍑芥暟璁捐娉?/p>
鍚屽叾瀹冪殑鐨勬暟瀛楁护娉㈠櫒璁捐鐨勬柟娉曚竴鏍凤紝鐢ㄧ獥鍑芥暟璁捐婊ゆ尝鍣ㄤ篃鏄鍏堣瀵规护娉㈠櫒鎻愬嚭鎬ц兘鎸?/p>
鏍囥�備竴鑸槸缁欏畾涓�涓悊鎯崇殑棰戠巼鍝嶅簲
)
(
jw
d
e
h
锛屼娇鎵�璁捐鐨?/p>
FIR
婊ゆ尝鍣ㄧ殑棰戠巼鍝嶅簲
)
(
jw
e
h
鍘婚�?/p>
杩戞墍瑕佹眰鐨勭悊鎯崇殑婊ゆ尝鍣ㄧ殑鍝嶅簲
)
(
jw
d
e
h
绐楀嚱鏁拌璁＄殑浠诲姟鍦ㄤ簬瀵绘壘涓�涓彲瀹炵幇
锛堟湁闄愰暱鍗曚綅鑴?/p>
鍐插搷搴旓級鐨勪紶閫掑嚱鏁般�?/p>
飪?/p>
飥?/p>
飥?/p>
飥?/p>
飥?/p>
1
0
)
(
)
(
N
n
jw
jw
n
e
n
h
e
H
鍘?/p>
閫?/p>
杩?/p>
)
(
jw
d
e
h
銆?/p>
鎴?/p>
浠?/p>
鐭?/p>
閬?/p>
锛?/p>
涓�
涓?/p>
鐞?/p>
鎯?/p>
鐨?/p>
棰?/p>
鐜?/p>
鍝?/p>
搴?/p>
)
(
jw
d
e
h
鐨?/p>
鍌?/p>
閲?/p>
鍙?/p>
鍙?/p>
鎹?
飪?/p>
飥?
飦?
飦?
2
0
)
(
2
1
)
(
dw
e
e
H
n
h
jwn
jw
d
d
鎵�寰楀埌鐨勭悊鎯崇殑鍗曚綅鑴夊啿鍝嶅簲
)
(
n
h
d
寰�寰�鏄竴涓棤闄愰暱搴忓垪锛屽
)
(
n
h
d
缁忚繃閫傚綋鐨勫姞鏉冦�佹埅鍙?/p>
澶勭悊鎵嶅緱鍒颁竴涓墍闇�瑕佺殑鏈夐檺闀胯剦鍐插搷搴斿簭鍒椼�傚搴斾笉鍚岀殑鍔犳潈銆佹埅鏂紝灏辨湁涓嶅悓鐨勭獥鍑芥暟銆?
鎵�瑕佸鎵剧殑婊ゆ尝鍣ㄨ剦鍐插搷搴斿氨绛変簬鐞嗘兂鑴夊啿鍝嶅簲鍜岀獥鍑芥暟鐨勪箻绉�傚嵆
)
(
)
(
)
(
n
w
n
h
n
h
d
飥?/p>
鐢辨鍙?/p>
瑙侊紝
绐楀嚱鏁扮殑鎬ц川灏卞喅瀹氫簡婊ゆ尝鍣ㄧ殑鍝佽川銆?/p>
渚嬪锛?/p>
绐楀嚱鏁扮殑涓荤摚瀹藉害鍐冲畾浜嗘护娉㈠櫒鐨勮繃娓″甫瀹斤紱
绐楀嚱鏁扮殑鏃佺摚浠ｉ攢鍐冲畾浜嗘护娉㈠櫒鐨勯樆甯﹁“鍑忋�備互涓嬫槸鍑犵甯歌鐨勭獥鍑芥暟锛?/p>
1
銆佺煩褰㈢獥
)
(
)
(
n
R
n
w
N
飥?/p>
2
銆?/p>
Hanning
绐?/p>
)
(
)]
1
2
cos(
1
[
5
.
0
)
(
n
R
N
n
n
w
N
飥?/p>
飥?/p>
飥?/p>
飦?/p>
3
銆?/p>
Hamming
绐?/p>
)
(
)]
1
2
cos(
46
.
0
54
.
0
[
)
(
n
R
N
n
n
w
N
飥?/p>
飥?/p>
飥?/p>
飦?/p>
4
銆?/p>
Blackman
绐?/p>
)
(
)]
1
4
cos(
08
.
0
)
1
2
cos(
5
.
0
42
.
0
[
)
(
n
R
N
n
N
n
n
w
N
飥?/p>
飥?/p>
飥?/p>
飥?/p>
飥?/p>
飦?/p>
飦?/p>
5
銆?/p>
Kaiser
绐?/p>
)
(
]
1
)
)
1
(
2
[(
1
(
)
(
0
2
0
飦?/p>
飦?/p>
I
N
n
I
n
w
飥?/p>
飥?/p>
飥?/p>
飥?/p>
鍏朵腑
)
(
0
飩?/p>
I
鏄浂闃惰礉濉炲皵鍑芥暟銆?/p>
Kaiser
绐楀彲浠ラ�氳繃鏀瑰彉
飦?/p>
鍙傛暟锛?/p>
鏀瑰彉鍏朵富鐡ｅ搴﹀拰鏃佺摚澶у皬銆?/p>
鍦?