Constellation of a digitally modulated signal (positions of the signal in the Fresnel plan at sampling times)
This graph shows a 128 QAM / 140 Mbit/s constellation, after adaptive equalization of a selective fading by the "Auto-adaptive equalizer" module of Radiosim. Number of symbols = 4096. Radiosim can also compute a full signature, varying the notch frequency by a "Loop" module.
The following figure shows parameters of the "Auto-adaptive equalizer" entered for this example :
Other examples : Fresnel plan Eye diagram Group delay of a feeder
Group delay of a filter
Interferences Bit Error Rate Multicarrier amplification Constellation Differential gain