Constellation Modulator: Difference between revisions
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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. | 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 == | == 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 == | == Example Flowgraph == | ||
This flowgraph modulates random bits with 8-PSK | 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. | ||
[[File:constellation_modulator_ex.png| | [[File:constellation_modulator_ex.png|600px]] | ||
[[File:constellation_modulator_ex2.png| | [[File:constellation_modulator_ex2.png|600px]] | ||
== Source Files == | |||
; Python | |||
: [https://github.com/gnuradio/gnuradio/blob/af78fad36d41b7c0d653ad21ec5ad8d58585d230/gr-digital/python/digital/generic_mod_demod.py#L64] | |||
; Block definition | |||
: [https://github.com/gnuradio/gnuradio/blob/main/gr-digital/grc/digital_constellation_modulator.block.yml] | |||
Latest revision as of 13:06, 30 August 2022
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]