AFT Create FIR Normalized Filtered-X LMS VI

LabVIEW 2013 Adaptive Filter Toolkit Help

Edition Date: June 2013

Part Number: 372357B-01

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Owning Palette: Filtered-X Adaptive Filter VIs

Requires: Adaptive Filter Toolkit

Creates a finite impulse response (FIR) adaptive filter with the normalized filtered-x least mean squares (LMS) algorithm.

Note  National Instruments recommends that you create and destroy adaptive filters outside loop structures.

secondary path specifies the impulse response of the secondary path. The length of the secondary path array must be greater than zero.
filter length specifies the filter length of the adaptive filter. The value must be greater than or equal to 2. The default is 128.
step size specifies the step size of the adaptive filter. The value must be greater than zero and less than 2. The default is 0.1. A large step size can improve the convergence speed of the resulting adaptive filter. However, a large step size might result in a large steady state error or cause instability in the resulting adaptive filter. The adaptive filter becomes unstable if the step size value is greater than 2.
error in describes error conditions that occur before this node runs. This input provides standard error in functionality.
filtered-x adaptive filter out returns the normalized filtered-x adaptive filter that this VI creates.
error out contains error information. This output provides standard error out functionality.


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