Hello,
I cannot get the combined Constellation Modulator/Decoder
as shown below to work. The figure below is an example from
the online Guided Tutorial PSK Demodulation.... I leave out
the Equalizer, Costas Loop blocks, the channel was set to pass
the signal unimpaired and the Poly Clock Sync was set for
Output sps=1. The constellation plot of the output of the Poly
Clock Sync is perfect. Now, in the flowgraph below, the signal
entering the Constellation Modulator and that leaving the
Constellation Decoder are routed into Time Sinks for display.
I route these signals into File Sinks so I can print them and
compare 1's and 0's. The results show they are not the same. I
passed
Constellation Rect.Object parameters to both the Constellation
Modulator and Decoder, which seems logical to me, but I could
be wrong???
Will appreciate any help you can provide because what
enters the modulator should be the same as what is leaving the
demodulator.
Regards,
George
