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MT Calculate Power Adjustment and PAPR (G Dataflow)

Version:
    Last Modified: February 7, 2018

    Calculates the full-scale power adjustment and the peak-to-average power ratio (PAPR).

    In the NI-RFSG peak-power mode, after scaling the waveform to a value between +1 and -1, the waveform power may not be at the desired level. You can use the full scale adjustment parameter to compensate for the loss in power and the PAPR parameter to change the average power of the modulated waveform to the peak power specifically required for streaming mode.

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    Note  

    The input complex waveform must be scaled by the worst case scaling factor generated by MT Calculate Worst Case Scaling Factor (Modulation and Resample).

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    input complex waveform

    The modulated complex baseband waveform data.

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    t0

    Trigger (start) time of the Y array.

    Default: 0.0

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    dt

    Time interval between data points in the Y array.

    Default: 1.0

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    Y

    The complex-valued signal-only baseband modulated waveform. The real and imaginary parts of this complex data array correspond to the in-phase (I) and quadrature-phase (Q) data, respectively.

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    waveform scaling factor

    Scaling factor used on the waveform to position it between +1 and -1. Typically, you have to wire this parameter from the waveform scaling factor parameter of MT Calculate Worst Case Scaling Factor.

    This node uses this parameter to scale the input complex waveform.

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    error in

    Error conditions that occur before this node runs.

    The node responds to this input according to standard error behavior.

    Standard Error Behavior

    Many nodes provide an error in input and an error out output so that the node can respond to and communicate errors that occur while code is running. The value of error in specifies whether an error occurred before the node runs. Most nodes respond to values of error in in a standard, predictable way.

    error in does not contain an error error in contains an error
    If no error occurred before the node runs, the node begins execution normally.

    If no error occurs while the node runs, it returns no error. If an error does occur while the node runs, it returns that error information as error out.

    If an error occurred before the node runs, the node does not execute. Instead, it returns the error in value as error out.

    Default: No error

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    reset?

    A Boolean that determines whether to calculate the full scale adjustment and PAPR parameters. On first call, reset? is set to TRUE by default.

    TRUE Calculates the full scale adjustment and PAPR parameters.
    FALSE Continues without calculating the full scale adjustment and PAPR parameters.

    Default: TRUE

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    Full Scale Adjustment

    The number by which the NI-RFSG power level must be adjusted.

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    PAPR

    PAPR of the scaled input complex waveform, where the scaling factor is derived from MT Calculate Worst Case Scaling Factor.

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    error out

    Error information.

    The node produces this output according to standard error behavior.

    Standard Error Behavior

    Many nodes provide an error in input and an error out output so that the node can respond to and communicate errors that occur while code is running. The value of error in specifies whether an error occurred before the node runs. Most nodes respond to values of error in in a standard, predictable way.

    error in does not contain an error error in contains an error
    If no error occurred before the node runs, the node begins execution normally.

    If no error occurs while the node runs, it returns no error. If an error does occur while the node runs, it returns that error information as error out.

    If an error occurred before the node runs, the node does not execute. Instead, it returns the error in value as error out.

    Where This Node Can Run:

    Desktop OS: Windows

    FPGA: Not supported

    Web Server: Not supported in VIs that run in a web application


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