initial state for CNiIIRCascadeFilterHi

[MarioR]

Hi,
I'm using a CNiIIRCascadeFilter for my signal processing.  I perform a forward an backward filtering on the data. To reduce transient on both ends I have to introcude paddings and to set the initial state of the filter. Is it possible to set the initial state? I could not find an appropriate method. Or is there a 'trick' to feed the filter with special values to achiev the wished state?

Thank you
 Mario

[TobiasL]

Hi Mario!

I didn't found any 'trick' to in set an initial state. I didn't found anything else than that is documented in the MStudio help. For all methods of these classe please refer the help file.

ms-help://MS.VSCC.v80/MS.VSIPCC.v80/NI.MeasurementStudio.2005/NIVCAnalysis/Objects/CNiIIRCascadeFilter/Main.htm


Regards
Tobias Lange

[MarioR]

OK, when I'm talking about the initial state I do not mean the forward and backward coefficients. I mean the initial values of the internal states which are needed to calculate the output.
What I can do is formulate the filter as a system of equations and try to solve this system for the input values. May work....