Fortune Telling Collection - Zodiac Guide - Level problem of QPSK
Level problem of QPSK
QPSK is orthogonal carrier modulation. After serial-parallel conversion, the two orthogonal carriers are modulated respectively.
MPSK is the same, corresponding to M points on the constellation, the projection value of each point on the X axis and Y axis is the level value of two orthogonal carriers modulated respectively.
The modulated signal is the superposition of two signals.
Finally, it is transmitted after band pass and band limit.
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