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| author | Tom Rondeau <tom@trondeau.com> | 2014-04-23 18:34:11 -0400 |
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| committer | Tom Rondeau <tom@trondeau.com> | 2014-04-23 18:34:11 -0400 |
| commit | 720f55287c5fe5cd3d7d6541f13382f3500f7f85 (patch) | |
| tree | 75aa91af187ba07e0a02205ce67b6c82a18ca005 /gr-digital/doc/digital.dox | |
| parent | e2afce984c606a1373150c5f6f51a4b00cd0b47a (diff) | |
docs: more documentation.
Stealing some of Martin Braun's PMT tutorial work for the pmt page. Added more info on constellations.
Diffstat (limited to 'gr-digital/doc/digital.dox')
| -rw-r--r-- | gr-digital/doc/digital.dox | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/gr-digital/doc/digital.dox b/gr-digital/doc/digital.dox index 48feda3485..5f2b3bb2fb 100644 --- a/gr-digital/doc/digital.dox +++ b/gr-digital/doc/digital.dox @@ -348,6 +348,28 @@ single bit of data. A block like 'pack_k_bits' can be used following this to convert the data back into bytes. +\section digital_constellation_modulator Constellation Modulator + +The Constellation Modulator, Constellation Receiver, and Constellation +Decoder can all take Constellation Objects to define what they are +meant to transmit and receive. + +The gr::digital::constellation_modulator block takes as a parameter +the reference to the constellation object. The block is very generic +in that the mapping from bits to symbols is done based on the +constellation object passed to it. The modulator block requires packed +bits as the input stream (that is, all 8 bits of the stream contain +information). + +The other parameters of this block include a setting as to whether or +not to differentially encode the symbols, the number of samples per +symbols, and the excess bandwidth of the transmitted pulse-shaped +signal. + +We can set up the transmitter using the constellation modulator block +and use the same constellation object at the receiver so we know the +same constellation settings are being used. + \section digital_softbits Support for Soft Decisions To support soft decisions of the receivers instead of the current hard |