《DSP using MATLAB》示例Example 6.10

上代码：

% Pole-Zero IIR filter to Lattice-ladder structure filter
b = [1, 2, 2, 1]; a = [1, 13/24, 5/8, 1/3]; [K, C] = dir2ladr(b, a)

% To Check
[delta, n] = impseq(0, 0, 7);
format long;
hdirect = filter(b, a, delta)

hlattice = ladrfilt(K, C, delta)

[b1, a1] = ladr2dir(K, C)

　　运行结果：

结构图：