MT Generate QAM System Parameters (M)
- Updated2023-02-17
- 3 minute(s) read
MT Generate QAM System Parameters (M)
Calculates parameters for use with either MT Modulate QAM or MT Demodulate QAM. The node accepts an M-ary value that specifies a predefined symbol map with the number of distinct symbol map values to use as symbols.
Inputs/Outputs
samples per symbol
An even number of samples dedicated to each symbol. Multiply this value by the symbol rate to determine the sample rate.
Default value: 16
M-QAM
The M-ary number, which is the number of distinct states that represent symbols in the complex baseband modulated waveform. This value must be a positive power of 2 and must be less than 256.
Default value: 16
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
QAM system parameters
Parameter values defining the QAM system. Wire this cluster to the corresponding system parameters cluster of MT Modulate QAM or MT Demodulate QAM.
samples per symbol
Number of samples per symbol in the modulated output complex waveform. For error-free operation, the samples per symbol must be an even number.
symbol map
An ordered array that maps each symbol value to its desired coordinates in the complex plane. The number of QAM states in the array must be 2N, where N is the number of bits per symbol. The length of the vector for the symbols farthest from the origin must be 1.
bits per symbol
Number of bits represented by each symbol. This value is equal to Log2(M), where M is the order of the modulation (for example, for 16-QAM, M = 16).
error out
Error information.
The node produces this output according to standard error behavior.