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Filter (Bandpass » Equi-Ripple FIR) (G Dataflow)

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    Last Modified: January 9, 2017

    Filters a signal using a bandpass FIR filter with equi-ripple characteristics. Bandpass filters pass a certain band of frequencies.

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    reset

    A Boolean that specifies the initialization of the internal state of the node.

    True Initializes the internal state to zero.
    False Initializes the internal state to the final state from the previous call of this node.

    This node automatically initializes the internal state to zero on the first call and runs continuously until this input is True.

    Default: False

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    signal

    The input signal.

    This input supports the following data types:

    • Waveform
    • 1D array of waveforms
    • 1D array of double-precision, floating-point numbers
    • 1D array of complex double-precision, floating-point numbers
    • 2D array of double-precision, floating-point numbers
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    lower passband frequency

    Lower of the two passband frequencies. lower passband frequency must be greater than lower stopband frequency and observe the Nyquist criterion.

    Default: 0.25

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    lower stopband frequency

    Lower of the two stopband frequencies. lower stopband frequency must be greater than 0 and observe the Nyquist criterion.

    Default: 0.2

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    number of taps

    Number of taps in the FIR filter.

    Default: 32

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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.

    Default: No error

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    sampling frequency

    The sampling frequency in Hz.

    sampling frequency is available only if you wire a 1D or 2D array of double-precision, floating-point numbers to signal. The value must be greater than zero.

    Default: 1, which is the normalized sampling frequency

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    higher passband frequency

    Higher of the two passband frequencies. higher passband frequency must be greater than lower passband frequency and observe the Nyquist criterion.

    Default: 0.35

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    higher stopband frequency

    Higher of the two stopband frequencies. higher stopband frequency must be greater than higher passband frequency and observe the Nyquist criterion.

    Default: 0.4

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    filtered signal

    Result of filtering the input signal.

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    error out

    Error information. The node produces this output according to standard error behavior.

    Relationship of Stopband and Passband Frequencies

    The first stopband of the filter region goes from zero frequency to the lower stopband frequency. The passband region goes from the lower passband frequency to the higher passband frequency. The second stopband region goes from the higher stopband frequency to the Nyquist frequency.

    Where This Node Can Run:

    Desktop OS: Windows

    FPGA: Not supported


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