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单词 quarternary phase-shift keying
释义 quarternary phase-shift keying
[`kwät·ǝ´ner·ē `fāz ´shift ´kē·iŋ]
ELECTRONICS
Modulation of a microwave carrier with two parallel streams of nonreturn-to-zero data in such a way that the data is transmitted as 90° phase shifts of the carrier; this gives twice the message channel capacity of binary phase-shift keying in the same bandwidth. Abbreviated QPSK.
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