SubbandAdaptiveX

Subband Adaptive System with Crossterms for aliasing reduction

These scripts and functions was developed for the course Circuiti e Algoritmi per Applicazioni Mutimediali at Università Politecnica delle Marche, following the article Adaptive filtering in subbands with critical sampling: analysis, experiments, and application to acoustic echo cancellation - A.Gilloire, M.Vetterli

• N_LMS.m simple LMS and NLMS single channel adaptive filter

• QMF_2.m Quadrature Mirror Filter bank for analysis/synthesis, made with Johnston 12B coefficients

• QMF_poly.m Quadrature Mirror Filter bank for analysis/synthesis, made with Johnston 12B coefficients and polyphase decomposition

• pQMF.m Multi-band pseudo QMF filter bank for analysis/synthesis, made with cosine modulation of a prototype LP filter

• Adaptive_QMFB_2.m Adaptive 2-band structure with QMF

• Adaptive_QMFB_2_cross.m Adaptive 2-band structure with QMF and cross-filters

• Adaptive_pQMFB.m Adaptive multiband structure with pseudoQMF and cross-filters

• qmfa.m , qmfs.m analysis/synthesis functions

• nlms_cross_dual.m , nlms_cross_multi.m adaptive functions

• Adaptive_AEC.m Adaptive Acoustic Echo Cancellation application scenario of multirate system with crossterms