In the model communications system, the modulation process also is loaded the digital signal in the carrier scope value, the carrier frequency or on the carrier phase.

在典型的通信系统中，调制过程是数字信号加载在载波的幅度值、载波的频率或者载波的相位上。

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The system uses time-frequency tracking loops to extract phase errors from data subcarriers with frequency interpolation to compensate for the estimated carrier frequency offsets.

该方法使用了时频同步跟踪环路，从数据子载波提取相位误差，并利用频域插值补偿多个用户的估计频偏。

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Carrier frequency synchronization is one of the key techniques of OFDM system.

载波同步是正交频分复用系统的一项关键技术。

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