MT Map PAM Symbols to Bits

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Maps complex-valued PAM symbols to an output bit stream based on a user-specified symbol map.

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.

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 $(500) \times \log_{2} (256) = 4000 m e s s a g e b i t s$ .

Inputs/Outputs
Compatibility

symbols

The incoming complex-valued symbols to be mapped to the output bit stream based on the symbol map.

symbol map

An ordered array that maps each symbol value to its desired coordinates in the complex plane.

The number of PAM states in the array must be 2^N, where N is the number of bits per symbol. The length of the vector for the symbols farthest from the origin must be 1. To specify a prebuilt map, unbundle the symbol map element from the PAM system parameters cluster generated byMT Generate PAM System Parameters (M) or MT Generate PAM System Parameters (map).