QPSKQuadrature phase shift keying) is a differential modulation format where the bits for a given symbol are determined by the phase change from the previous symbol.(Differential
There are four possible phase state transitions (0, pi, and +/-(pi/2) radians) therefore each symbol represents log2(4) = 2 bits of data.
The constellation of a DQPSKDifferential Quadrature Phase Shift Keying: QPSK modulation using differential encoding of the digital information stream. signal is the same as a QPSK signal.
QPSK (Digital Demod)
Available Digital Demodulation Formats (Digital Demod)
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