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MT Map Bits to MSK symbols (G Dataflow)

Last Modified: January 9, 2017

Maps an incoming bit stream to symbols comprised of MSK frequency deviations.

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input bit stream

The incoming bit stream to be mapped to symbols.

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symbol rate

The symbol rate, in hertz (Hz), of the input bit stream.

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Note  

For MSK modulation, the frequency deviation is ¼ the symbol rate. For nondifferential MSK, the symbol-to-bit mapping is performed by mapping bit 0 -0.25 × symbol rate, and mapping bit 1 +0.25 × symbol rate.

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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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differential encoding enable

A value that indicates whether to enable differential encoding of the bit stream prior to mapping to MSK symbols.

Name Description
disable

Disables bit stream encoding.

enable

Enables bit stream encoding.

Default: enable

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reset?

A Boolean that determines whether stored state information is cleared on each call to this node.

When the input bit stream is not comprised of an integer number of symbols, the carryover bits are buffered.

TRUE Clears the buffered data, checks the input parameters on a first call, and reflects any change in the input parameter values during subsequent iterations.
FALSE Adds the buffered data to the beginning of data from next iteration, in continuous operations.

Default: TRUE

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symbols

An array of MSK frequency deviations with a one-to-one mapping to the input bit stream.

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Note  

Wire this parameter to MT Apply Pulse Shaping Filter (MSK, CPM) to generate the oversampled baseband complex waveform.

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error out

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

Where This Node Can Run:

Desktop OS: Windows

FPGA: Not supported


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