一种减少频谱泄漏的自适应算法

A Adaptive Algorithm for Reducing Spectrum Leakage

提出了一种既能提高周期信号的测试精度 ,又不增加计算量的自适应算法 ,其核心是当周期信号周期的整数倍等于采样周期与采样点数的乘积时 ,运用该算法得出的离散序列就是直接对信号采样后得到的离散序列 ;不等于时 ,自适应算法将自动调整采样得到的离散序列 ,使其最大限度地逼近理想离散序列 ,从而减少频谱泄漏。

A kind of algorithm that improves test precision of periodic signal is proposed and the calculation time reduced. When the multiple of the period of periodic signal is equal to the product of the period and the number of sampling, the discrete series calculated by the algorithm is equal to that gained by sampling directly. When the multiple of the period of periodic signal is not equal to the product of the period and the number of sampling, the algorithm will adjust the discrete series gained by sampling, and make it approach the ideal discrete series. The result of the algorithmic processing shows that the spectrum leakage is reduced.