Though increasing the time window length or the sampling number can improve frequency resolution, yet the calculation will be cumbersome.
欲提高频率分辨率，只有增加时间窗长度或增加采样点数，这又必然会增大计算量。
On the basis of this method, and taking advantages of the methods-time-domain translation as well as the window length change, the uniform formula for the phase difference correction is derived.
在此基础上，将窗中心平移法与时域平移和改变窗长法综合应用，推导出相位差校正的统一公式。
The transmitting window of an ONU is indicated in GATE message where start time and length are specified.
GATE消息指示onu的发送窗口，包括窗口的开始时间和长度。
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