DQPSK

differential quadrature phase shift keying
差動四相位相シフト キーイング. ディジタル通信方式の一つ. 自動車電話の通信方式.
differential quadrature phase shift keying; a digital communication system; e.g. π/4 DQPSK; a modification of QPSK(quadrature phase shift keying); this format has four potential phase states, which require two

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