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。

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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。

youdao