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MT Map Symbols to Bits (MT Map FSK Symbols to Bits) (G Dataflow)

Version:
    Last Modified: February 7, 2018

    Maps symbols comprised of Frequency Shift-Keying (FSK) frequency deviations to an output bit stream based on the symbol map that you specify.

    Programming Patterns
    Use this node in conjunction with MT Matched Filter, MT Align to Ideal Symbols, MT Decimate Oversampled Waveform, and MT Calculate BER to perform waveform analysis on the modulated waveform.
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    Note  

    The mapping of symbols to bits depends on the number of bits per symbol, which equals log 2 ( M ) with M representing the size of the modulation scheme. For example, in a 256-QAM system, 500 QAM symbols are mapped to ( 500 ) × log 2 ( 256 ) = 4000 m e s s a g e b i t s .

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    symbols

    An array of frequency deviations for one-to-one mapping to the output bit stream.

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    symbol map

    An ordered array that maps each symbol value to its desired deviation frequency.

    The number of FSK levels in the array must be 2 N , where N is the number of bits per symbol. To specify a prebuilt map, unbundle the symbol map element from the FSK system parameters cluster generated by MT Generate FSK System Parameters (M) or MT Generate FSK System Parameters (map).

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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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    output bit stream

    A bit stream with a one-to-one mapping to the input symbols based on the specified symbol map.

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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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