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四相相移键控
avia. quadrature phase shift keying
IT quaternary phase-shift keying
mil., air.def. quarternary phase-shift keying
space quadriphase shift keying; quarternary phase shift keying (卫星通信中的一种开关式载波调制方式)
tech. quarternary phase shift keying
π/4四相相移键控
space π/4-QPSK
四 相 相移键控: 69 phrases in 9 subjects
Aviation3
Cartography1
Communications2
Earth sciences1
Electronics24
Information technology4
Space8
Technology2
Telecommunications24

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