提出了组合余弦窗函数优化的通用原则,利用该原则导出最大旁瓣衰减速度优化组合余弦窗函数.在非相干采样方式下,这类优化窗函数能使旁瓣以最大速度衰落,从而显著降低了频谱泄漏,有助于实现电网谐波的高精度分析.
The general principles for optimizing combined cosine window functions are put forward,and applying the principles,the optimized combined cosine window functions with maximum side lobe decay are deduced.In incoherent sampling mode,these optimized window functions can make side lobes decay with maximum speed,so spectral leakage is obviously reduced.This is helpful to realize high-precision power grid harmonics analysis.