Table Of Contents

MT Generate System Parameters (MT Generate CPM System Parameters (map)) (G Dataflow)

Version:
    Last Modified: February 7, 2018

    Calculates parameters for use with either MT Modulate CPM or MT Demodulate CPM. Wire the CPM system parameters passed from this node to the corresponding cluster of MT Modulate CPM, MT Demodulate CPM, and MT Detect CPM. It accepts an input array of symbol values that explicitly define the positions of the symbol map.

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    samples per symbol

    Number of samples dedicated to each symbol. Multiply this value by the symbol rate to determine the sample rate.

    Default: 16

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    symbol indices

    Array of symbol values with an order that corresponds to the symbol map. The number of CPM levels specified here must be 2 N , where N is the number of bits per symbol.

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    modulation index, h(i)

    Modulation index for the CPM modulation scheme.

    Refer to CPM Modulation for more information about modulation indices. The modulation index must be of proper form, that is, the numerator must be lesser than the denominator. The modulation index may vary between symbol intervals.

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    numerator

    Numerator of the modulation index.

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    denominator

    Denominator of the modulation index.

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    symbol rate

    The desired symbol rate, in hertz (Hz).

    Default: 1.0

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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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    CPM system parameters

    Parameter values defining the CPM system. Wire this parameter to the corresponding system parameters cluster of MT Modulate CPM, MT Demodulate CPM, or MT Detect CPM.

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    samples per symbol

    Number of samples dedicated to each symbol. Multiply this value by the symbol rate to determine the sample rate.

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    symbol map

    A two-dimensional array of desired frequency deviations. Each column corresponds to a symbol, with the binary representation of the column index being the mapped bit-representation of the symbol. Each row corresponds to a modulation index in the order in which it appears in the modulation index, h(i) parameter of MT Generate CPM System Parameters (M) or MT Generate CPM System Parameters (map).

    Default: Empty array

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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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