Constellation Modulator

Hierarchical block for RRC-filtered differential generic modulation. The input is a byte stream (unsigned char) and the output is the complex modulated signal at baseband.

Parameters

Constellation

determines the modulation type, provide a Constellation Object here.

Samples per Symbol

samples per baud >= 2 (int)

Differential Encoding

whether to use differential encoding (boolean)

Excess BW

Root-raised cosine (RRC) filter excess bandwidth (float)

Verbose

Print information about modulator? (boolean)

Log

Log modulation data to files? (boolean)

Example Flowgraph

This flowgraph modulates random bits with 8-PSK. A QT GUI Constellation Sink is specifically not added to the output because it would show the signal while there is still multiple samples per symbol.

Source Files

Python

[1]

Block definition

[2]