IirDirectFilterComplex Class

Measurement Studio 2019 Help

Edition Date: May 2019

Part Number: 375857B-01

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Note: This topic applies to the following Measurement Studio editions: Enterprise, Professional.

Implements a class that filters the input sequence using the direct form IIR filter specified by the reverse coefficients and forward coefficients.

Namespace: NationalInstruments.Analysis.Dsp.Filters

Assembly: NationalInstruments.Analysis.Enterprise (in NationalInstruments.Analysis.Enterprise.dll) Version: (


Visual Basic (Declaration)
<SecurityPermissionAttribute(SecurityAction.Demand, Flags := SecurityPermissionFlag.UnmanagedCode)> _
Public Class IirDirectFilterComplex _
	Implements IFilterComplex

[SecurityPermissionAttribute(SecurityAction.Demand, Flags = SecurityPermissionFlag.UnmanagedCode)]
public class IirDirectFilterComplex : IFilterComplex


Use this class if you want to provide your own reverse coefficients and forward coefficients and the input sequence is ComplexDouble. The input sequence is filtered using the direct form IIR filter and the reverse coefficients and forward coefficients using the following formula:

where y is the input array,
Nb is the number of forward coefficients,
bj is forward coefficients,
Na is the number of reverse coefficients, and
ak is reverse coefficients.

Inheritance Hierarchy


Thread Safety

Any public static (Shared in Visual Basic) members of this type are safe for multithreaded operations. Any instance members are not guaranteed to be thread safe.

See Also


IirDirectFilterComplex Members

NationalInstruments.Analysis.Dsp.Filters Namespace


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