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1·Offset Quadrature Phase Shift Keying?

偏移量正交相移键控oqps K ？

2·Quadrature phase shift keying(QPSK) signaling is employed to make efficient use of the available bandwidth.

传输信号采用正交相移键控调制方式，以有效利用有限通信带宽。

3·Quadrature phase shift carrier modulation is used to represent the four different phase inputs of digital information, is quaternary phase shift keying.

四相相移调制是利用载波的四种不同相位差来表征输入的数字信息，是四进制移相键控。