MT Generate CPM System Parameters (map)
- Updated2023-02-17
- 3 minute(s) read
MT Generate CPM System Parameters (map)
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.
Inputs/Outputs
samples per symbol
Number of samples dedicated to each symbol. Multiply this value by the symbol rate to determine the sample rate.
Default value: 16
symbol indices
Array of symbol values with an order that corresponds to the symbol map. The number of CPM levels specified here must be 2N, where N is the number of bits per symbol.
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.
numerator
Numerator of the modulation index.
denominator
Denominator of the modulation index.
symbol rate
The desired symbol rate, in hertz (Hz).
Default value: 1.0
error in
Error conditions that occur before this node runs.
The node responds to this input according to standard error behavior.
Default value: No error
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.
samples per symbol
Number of samples dedicated to each symbol. Multiply this value by the symbol rate to determine the sample rate.
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 value: Empty array
error out
Error information.
The node produces this output according to standard error behavior.