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Code Listing by Masaaki Nagahara

Code 1-4 of 4   

[psi gopt] = dfdesign_w_lmi(phi, w, d, n);

DFDESIGN_W_LMI computes the H-infinity optimal inverse FIR filter of phi(z).
The resulting filter minimizes the H-infinity norm of the error system
E_w(z) = [z^(-d) - psi(z)phi(z)]w(z).
The LMI method based on KYP lemma is used in this function.

phi: target system (discrete-time), SS or TF format
w: weighting function, SS or TF format

[psi gopt] = dfdesign_w(phi, w, d);

DFDESIGN_W computes the H-infinity optimal inverse filter of a given filter phi(z).
The resulting filter psi(z) minimizes the H-infinity norm of the error system
E_w(z) = [z^(-d) -...

Matlab codes are provided for min-max optimization for loop-filter design in delta-sigma modulators.
The MATLAB codes are based on our recent paper:
M. Nagahara and Y. Yamamoto,
Frequency-Domain Min-Max Optimization of Noise-Shaping...

Computes the H-infinity optimal causal filter (indirect B-spline filter) for the cubic spline.

d: delay

psi: the optimal filter psi(z) in a TF object
gopt: optimal value

This file is...