然后讨论了利用同步采样消除谱泄漏的原理与方法；
The principle and methods to reduce the spectrum leakage by synchronizing the data sampling with the signal frequency was too given.
同时，通过消除频域导频时域序列的自相关误差，能有效降低由DFT谱泄漏导致的信道估计误差。
At the same time, the channel estimation error, caused by the spectral leakage of DFT, can be reduced by canceling the auto-correlation error of the time-domain sequence of frequency-domain pilots.
频谱分析法的核心是FFT, FFT方法进行谐波分析会出现谱泄漏现象，影响失真度的测试精度。
The core of spectrum analytical method is FFT, which generally brings spectrum leakage in course of analysis, and affects the precision of distortion measurement.
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