# Documentation

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# Adaptive Filters

LMS, RLS, frequency-domain filters

## System Objects

 `dsp.BlockLMSFilter` Compute output, error, and weights using Block LMS adaptive algorithm `dsp.LMSFilter` LMS adaptive filter `dsp.RLSFilter` Compute output, error and coefficients using Recursive Least Squares (RLS) algorithm `dsp.AffineProjectionFilter` Compute output, error and coefficients using Affine Projection (AP) Algorithm `dsp.AdaptiveLatticeFilter` Adaptive lattice filter `dsp.FastTransversalFilter` Fast Transversal filter `dsp.FilteredXLMSFilter` Filtered XLMS filter `dsp.FrequencyDomainAdaptiveFilter` Frequency Domain Adaptive filter `dsp.KalmanFilter` Estimate system measurements and states using Kalman filter

## Blocks

 Block LMS Filter Compute output, error, and weights using LMS adaptive algorithm Fast Block LMS Filter Compute output, error, and weights using LMS adaptive algorithm Kalman Filter Predict or estimate states of dynamic systems LMS Filter Compute output, error, and weights using LMS adaptive algorithm LMS Update Estimate weights of LMS adaptive filter RLS Filter Compute filtered output, filter error, and filter weights for given input and desired signal using RLS adaptive filter algorithm

## Topics

LMS Adaptive Filters

Presents examples of adaptive filters that use LMS algorithms to determine filter coefficients

RLS Adaptive Filters

Presents examples of adaptive filters that use RLS algorithms to determine filter coefficients

Overview of Adaptive Filters and Applications

Provides a short discussion about adaptive filters and their uses

Adaptive Filters in DSP System Toolbox Software

Learn about the adaptive filter objects provided in the toolbox

Adaptive Filters in Simulink

Create and customize an adaptive filter using an LMS Filter block

Adaptive Noise Cancellation Using RLS Adaptive Filtering

This example shows how to use an RLS filter to extract useful information from a noisy signal.

Signal Enhancement Using LMS and Normalized LMS

Uses a signal enhancement application to introduce adaptive filters

Variable-Size Signal Support DSP System Objects

List of System objects which support variable-sized signals in DSP System Toolbox™.

References — Adaptive Filters

Suggested reading and sources for adaptive filter topics

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