“quarternary phase-shift keying”的概念、定义、翻译、参考文献-科学参考

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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