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Digital Modulation Techniques for Data Communication: Qpsk vs Dqpsk
Digital communication must transmit data efficiently and reliably. QPSK (Quadrature Phase Shift Keying) represents data using four absolute phase values of the carrier such as 45°, 135°, 225°, and 315°. Each phase represents a unique pair of bits. DQPSK (Differential QPSK) instead encodes data using the phase change between consecutive ...
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