Make sure all the input and output cabling has been performed correctly and check the input phaserotation.
确保所有输入输出电缆线路设置正确，并检查输入相位旋转。
2
At a receiver, a phaserotation 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。
3
This algorithm combines the block Pilot-aided LS channel estimation algorithm with a phase tracking algorithm, which can compensate the phaserotation caused by the residual carrier frequency offset.