QPSK
正交相移键控（QuadraturePhaseShiftKeying，QPSK）是一种数字调制方式。它分为绝对相移和相对相移两种。由于绝对相移方式存在相位模糊问题，所以在实际中主要采用相对移相方式DQPSK。
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It describes the main differences between DVB-S and DVB-S2. Key words: DVB-S.2, Modulation, QPSK, 8
It describes the main differences between DVB-S and DVB-S2. Key words: DVB-S.2, Modulation, QPSK, 8PSK, 16APSK, 32APSK,...
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Consider a BPSK and a QPSK system for the following two cases: 1) The probability that the symbol 1
Consider a BPSK and a QPSK system for the following two cases: 1) The probability that the symbol 1 is sent and the prob...