define dpsk modulator
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Differential phase shift keying (DPSK) is a common form of phase modulation that conveys data by changing the phase of the carrier wave. As mentioned for BPSK and QPSK there is an ambiguity of phase if the constellation is rotated by some effect in the communications channel through which the signal passes.
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phase _ shift keying is a digital modulator process which convey data by changing the phase of a consent frequency reference signal ....
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