Company Events Academic Community Support Solutions Products & Services Contact NI MyNI

AFT Filter Signal VI

LabVIEW 2013 Adaptive Filter Toolkit Help

Edition Date: June 2013

Part Number: 372357B-01

»View Product Info
Download Help (Windows Only)

Owning Palette: Adaptive Filters VIs

Requires: Adaptive Filter Toolkit

Filters an input signal with an adaptive filter point by point. You must use the least mean squares (LMS) or recursive least squares (RLS) algorithms to create the adaptive filter. Unlike the AFT Filter Signal and Update Coefficients VI, the AFT Filter Signal VI does not update the coefficients of the adaptive filter. Use the AFT Update Coefficients VI to update the filter coefficients. Wire data to the x(n) input to determine the polymorphic instance to use or manually select the instance. The data type of the adaptive filter that you wire to the adaptive filter in input must match the instance of the AFT Filter Signal VI.

Note  Do not use the AFT Filter Signal VI with the AFT Create FIR Fast Block LMS and AFT Create FIR QR-RLS VIs.

Examples

Use the pull-down menu to select an instance of this VI.

AFT Filter Signal (Real, PtByPt)

reset? specifies whether to reset the internal states and coefficients of the adaptive filter to zeroes. The default is FALSE.
adaptive filter in specifies the adaptive filter that you create.
x(n) specifies the input signal x(n) to the adaptive filter.
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 in unchanged.
y(n) returns the output signal from the adaptive filter.
error out contains error information. This output provides standard error out functionality.

AFT Filter Signal (Complex, PtByPt)

reset? specifies whether to reset the internal states and coefficients of the adaptive filter to zeroes. The default is FALSE.
adaptive filter in specifies the adaptive filter that you create.
x(n) specifies the input signal x(n) to the adaptive filter.
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 in unchanged.
y(n) returns the output signal from the adaptive filter.
error out contains error information. This output provides standard error out functionality.

Examples

Refer to the following VIs for examples of using the AFT Filter Signal VI:

  • Adaptive Channel Equalization VI: labview\examples\Adaptive Filters\Applications\Adaptive Channel Equalization
  • Control Coefficients Updating for Adaptive Filter VI: labview\examples\Adaptive Filters\Getting Started

 

Your Feedback! poor Poor  |  Excellent excellent   Yes No
 Document Quality? 
 Answered Your Question? 
Add Comments 1 2 3 4 5 submit