Implement transfer function into LabView

[absi78]

Hi,

I have got an analog system which is connected with LABVIEW. I generate a sine pattern in Labview (modulated carrier) and send it through my analog system (RF Field with antenna coil). Due to the antenna coil Q-factor the original waveform gets deshaped. Aim is to get a well-shaped waveform after the antenna coil

I know the transfer function of my antenna coil (, as H(z)=...), which depends on the coil Q-Factor

Now, I want to implement the inverse tranfer functiion after generating the sine pattern. With this way, after the waveform passes the analog system, it becomes the form that I want it to have. In LABView I have seen that there is the VI Transfer Function but I only can determine magnitud and phase.

In Matlab, this would be quite simple: I tranform my waveform into the frequency domain, multiplicate it with the inverse tranform function and transform it back into the time domain. Unfortunately, I have no Matlab installed.

Therefore, my question is: is this also possible in LAbview without Matlab? Or is there another way in order to realize this? Which VI's do I have to use?

Thank you in advance for your help,

Yours,

Robert Aberer

[Jochen]

The function you are looking for is called "Transfer function" which is part of the LabVIEW Simulation module. This is not the Transfer function.vi that is shipping with standard LabVIEW as it runs only within a simulation node.

Here are some of the main features of the LabVIEW simulation module:

• Develop dynamic systems such as motor controllers and hydraulic simulators with LabVIEW
• Implement your dynamic systems with real-time I/O using built-in LabVIEW data acquisition functions
• Translate models from The MathWorks, Inc. Simulink® into LabVIEW with built-in utility
• Simulate linear, nonlinear, and discrete systems with a wide array of solvers
• Deploy dynamic systems to real-time hardware with the NI LabVIEW Real-Time Module

I hope this helps,

Jochen Klier
National Instruments Germany