At a receiver, a phase rotation of the received data stream is determined to remove a residual frequency error or to estimate the phase noise.

在接收机处，确定所接收的数据流的相位旋转以去除残留频率误差或者估算相位噪声。

This algorithm combines the block Pilot-aided LS channel estimation algorithm with a phase tracking algorithm, which can compensate the phase rotation caused by the residual carrier frequency offset.

该算法在传统的基于块状导频的Ls信道估计算法的基础上，加入了相位跟踪算法，补偿了由残余频偏带来的相位旋转。

Through detecting the same edge in one period of Phase a to judge its direction of rotation precisely, a method for error-free measurement has been given.

通过检测A相一个周期的同一边沿，可精确判断其旋转方向，给出了无误差测量的实现方法。

The second phase, starting 120 milliseconds before impact, was the rapid rotation of the bat about a vertical axis into the hitting area.

第二个阶段则是球棒沿垂直轴朝击球区快速转动，该活动起始于球与棒相撞的前120毫秒。