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  • 《DSP using MATLAB》Problem 6.21

            代码:

    %% ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
    %%            Output Info about this m-file
    fprintf('
    ***********************************************************
    ');
    fprintf('        <DSP using MATLAB> Problem 6.21 
    
    ');
    
    banner();
    %% ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
    %format long;
    format short;
    
    fprintf('
     FIR filter All-Zero LATTICE-form:     
    ');
    Klc = [2, 0.6, 0.3, 0.5, 0.9] 
    
    % ----------------------------------------------------------
    % NOTE: linear-phase can not use LATTICE-form
    % ----------------------------------------------------------
    fprintf('
    Convert All-Zero LATTICE-form to DIRECT-form :     
    ');
    [b] = latc2dir(Klc) 
    a = 1
    
    fprintf('
    Convert DIRECT-form to PARALLEL-form :     
    ');
    [C, Bp, Ap] = dir2par(b, a)
    
    if size(C)==0
      C = 0;
    end
    
    fprintf('
    Convert DIRECT-form to CASCADE-form :     
    ');
    [b0, Bc, Ac] = dir2cas(b, a) 
    
    fprintf('
    Convert TF-form to SOS-form :     
    ');
    [sos, g] = tf2sos(b, a)
    
    
    fprintf('
    Convert DIRECT-form to FREQUENCY-SAMPLE-form 1 :     
    ');
    [Cfs, Bfs, Afs] = dir2fs(b) 
    
    fprintf('
    Convert DIRECT-form to FREQUENCY-SAMPLE-form 2 :     
    ');
    r = 0.99;
    [Cfs_r, Bfs_r, Afs_r, rM] = dir2fs_r(b, r) 
    
    % -----------------------------------------
    %     START check
    % -----------------------------------------
    n = [0:7];
    delta = impseq(0, 0, 7)
    %format long
    format  short
    hcas = casfiltr(b0, Bc, Ac, delta)
    
    hltc = latcfilt(Klc, delta)
    
    %hladr = ladrfilt(Klr, Clr, delta)
    
    hdir = filter(b, a, delta)
    % -------------------------------------------
    %       END check
    % -------------------------------------------
    

      运行结果:

            得到的直接形式系数

            串联形式系数

            频率采样形式1系数

            频率采样形式2系数

            Lattice和直接形式流图

    牢记: 1、如果你决定做某事,那就动手去做;不要受任何人、任何事的干扰。2、这个世界并不完美,但依然值得我们去为之奋斗。
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  • 原文地址:https://www.cnblogs.com/ky027wh-sx/p/10276298.html
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