AFT Create FIR Fast Block LMS VI

LabVIEW 2013 Adaptive Filter Toolkit Help

Edition Date: June 2013

Part Number: 372357B-01

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Owning Palette: Adaptive Filters VIs

Requires: Adaptive Filter Toolkit

Creates a finite impulse response (FIR) adaptive filter with the fast block least mean squares (LMS) algorithm.

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


filter length specifies the length of the adaptive filter. The default is 128.
step size specifies the step size of the adaptive filter. The value must be greater than zero. 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 default is 0.01.
constrained? specifies whether the implementation type of the fast block LMS algorithm is constrained or unconstrained. The default is TRUE.
error in describes error conditions that occur before this node runs. This input provides standard error in functionality.
adaptive filter out returns the adaptive filter that this VI creates.
error out contains error information. This output provides standard error out functionality.


Refer to the Convergence Speed and Computation Time of Adaptive Filters VI in the labview\examples\Adaptive Filters\Getting Started directory for an example of using the AFT Create FIR Fast Block LMS VI.


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