function?[Awtypetao]=amplres（h）
%給定FIR濾波器系數求濾波器符幅特性
%h=FIR濾波器的脈沖響應或分子系數向量
%A=濾波器的符幅特性
%w=頻率向量在0到pi之間分成500份501個點
%type=線性相位濾波器的類型
%tao=符幅特性的群時延
N=length（h）;tao=（N-1）/2;
L=floor（（N-1）/2）;%求濾波器的階次及符幅特性的階次
n=1:L+1;
w=[0:500]*2*pi/500;???????????????????????????????%取濾波器頻率向量
if?all（abs（h（n）?-h（N-n+1））<1e-10）????????????????%判斷濾波器系數若為對稱
???A=2*h（n）*cos（（（N+1）/2-n）‘*w）-mod（N2）*h（L+1）;%對稱條件下計算A（兩種類型）
???%在N=奇數時h（L+1）多算一倍要減掉。N為偶數時，乘以mod（N2）以取消這項
???type=2-mod（N2）;?????????????????????????????%判斷并給出類型
elseif?all（abs（h（n）?+h（N-n+1））<1e-10）&（h（L+1）*mod（N2）==0）?%系數若為反對稱
???%在N=奇數時h（L+1）為零是奇對稱判別條件之一，N為偶數時，乘以mod（N2）以取消這項
???A=2*h（n）*sin（（（N+1）/2-n）‘*w）;????????????????%反對稱條件下計算A（兩種類型）
???type?=4-mod（N2）;????????????????????????????%判斷并給出類型
else?error（‘錯誤:這不是線性相位濾波器!‘）???????????%濾波器系數非對稱，報告錯誤
end
???

?屬性????????????大小?????日期????時間???名稱
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?????文件???????1057??2007-09-04?16:28??MATLAB例題文件夾\amplres.m

?????文件????????505??2007-11-22?21:53??MATLAB例題文件夾\brqt.m

?????文件????????416??2007-07-10?22:49??MATLAB例題文件夾\CONVNEW.M

?????文件????????319??2008-03-31?13:31??MATLAB例題文件夾\cplxcomp.m

?????文件?????????88??2007-08-01?16:07??MATLAB例題文件夾\DFS.M

?????文件???????1381??2008-03-31?13:37??MATLAB例題文件夾\dir2par.m

?????文件????????199??2001-06-19?15:57??MATLAB例題文件夾\freqz_m.m

?????文件????????192??2007-09-07?16:52??MATLAB例題文件夾\ideal_lp.m

?????文件?????????92??2007-12-22?19:52??MATLAB例題文件夾\IDFS.M

?????文件????????250??2007-11-26?17:24??MATLAB例題文件夾\iirdata.inc

?????文件????????595??2008-06-23?14:43??MATLAB例題文件夾\KS03.m

?????文件????????613??2008-06-23?14:25??MATLAB例題文件夾\KS04.m

?????文件????????744??2007-09-17?17:34??MATLAB例題文件夾\mat01.mat

?????文件????????315??2008-06-30?11:51??MATLAB例題文件夾\Ms10R2.m

?????文件????????460??2008-06-26?15:47??MATLAB例題文件夾\Ms10R3.m

?????文件????????552??2008-06-26?15:45??MATLAB例題文件夾\Ms10R4.m

?????文件????????608??2008-06-14?09:21??MATLAB例題文件夾\Ms10R5.m

?????文件????????124??2007-07-24?15:50??MATLAB例題文件夾\Ms10_1.m

?????文件????????333??2007-07-26?22:02??MATLAB例題文件夾\Ms10_2.m

?????文件????????456??2007-07-26?22:30??MATLAB例題文件夾\Ms10_3.m

?????文件????????541??2007-09-28?11:31??MATLAB例題文件夾\Ms10_4.m

?????文件????????543??2007-07-27?18:26??MATLAB例題文件夾\Ms10_5.m

?????文件????????531??2007-07-28?16:20??MATLAB例題文件夾\Ms10_6.m

?????文件????????647??2008-06-11?16:50??MATLAB例題文件夾\Ms11r2.m

?????文件????????569??2007-06-23?17:18??MATLAB例題文件夾\MS11R21.M

?????文件????????787??2007-06-23?20:20??MATLAB例題文件夾\MS11R22.M

?????文件????????664??2007-06-24?10:16??MATLAB例題文件夾\MS11R24.M

?????文件????????742??2007-06-24?11:26??MATLAB例題文件夾\MS11R25.M

?????文件????????597??2008-06-11?16:51??MATLAB例題文件夾\Ms11r3.m

?????文件????????652??2007-08-07?18:09??MATLAB例題文件夾\Ms11_1.m

............此處省略275個文件信息