Adaptive Filtering

Implementation guideline — Use DSP System Toolbox System objects to implement adaptive filters. Do not implement manual weight-update loops.

When to Use

System identification — Model unknown FIR or IIR systems online
Noise or interference cancellation — Recover signals from noise-corrupted measurement
Echo cancellation — Suppress acoustic or line echo
Active noise control — Feedforward ANC with secondary path
Inverse system identification — Equalization and deconvolution
Adaptive prediction — Linear prediction and speech coding
Algorithm evaluation — Compare adaptive filter algorithm performance
Migrating from deprecated adaptfilt.* objects — Replaced by dsp.*Filter System objects (removed in R2020a)
Any task involving dsp.LMSFilter, dsp.RLSFilter, dsp.FilteredXLMSFilter, dsp.FrequencyDomainAdaptiveFilter, dsp.AffineProjectionFilter, or maxstep()