Fortune Telling Collection - Horoscope - Why qam is essentially a combination of ask and psk modulation?
Why qam is essentially a combination of ask and psk modulation?
Because QAM uses IQ modulation like PSK, but it also uses amplitude modulation on the basis of PSK, which makes the constellation points of QAM not all on a circle like PSK. The points in QAM modulation constellation are no longer located on the unit circle, but distributed in a certain range of complex plane. If the mode of each point is the same, the phase is different, and if the phase is the same, the mode is different.
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