If the "0" and "1" to change the carrier phase, called phase shift keying.

如果“0”和“1”来改变载波的相位，则称为相移键控。

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Thirdly, we quantify the power penalty caused by the PMD in optical subcarrier multiplexing (OSCM) system with amplitude shift keying (ASK) and binary phase shift keying (BPSK).

第三，对采用不同调制格式（包括幅移键控和二进制相移键控）的光副载波复用（OSCM）系统中，PMD引起的功率代价进行了量化。

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Compared to current phase shift keying (PSK) modulation by a code, there is a further modulation by a sub-carrier.

与当前通过编码的相移键控(PSK)调制相对，还存在另外的通过子载波的调制。

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