MT Map Bits to MSK symbols

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

1378

Inputs/Outputs

datatype_icon

input bit stream

The incoming bit stream to be mapped to symbols.

datatype_icon

symbol rate

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

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.
datatype_icon

error in

Error conditions that occur before this node runs.

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

Standard Error Behavior

Default value: No error

datatype_icon

differential encoding enable

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

disable

Disables bit stream encoding.

enable

Enables bit stream encoding.

Default value: enable

datatype_icon

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 value: TRUE

datatype_icon

symbols

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

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

error out

Error information.

The node produces this output according to standard error behavior.

Standard Error Behavior