Spectral overlapping due to interferences

Four modulated carriers travel through a common non-linear amplifier. One is a 16 QAM / 10 Mbauds, the three others are 4PSK / 2.5 MBauds. The graph shows the spectral power density at the amplifier output (at the amplifier input, the four spectra do not interleave)..

interferences.gif (6440 octets)

Other examples : Fresnel plan    Eye diagram     Group delay of a feeder    Group delay of a filter
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