After deeply studied in the fast Fourier transform (FFT) method, this paper presents an improved FFT algorithm considering the half-wave symmetric characteristic of power system signals.
在深入分析快速傅里叶变换(FFT)方法的基础上，针对一类电网信号具有半波对称性的特点，提出了一种改进的FFT算法。
Under the conditions of meeting the real time imaging and given resolution, the algorithmic speed required by the system is analyzed. And an improved FFT algorithm and its implementation are given.
在满足实时成像和一定分辨率的条件下，分析了系统对运算速度的要求，提出了一种改进的快速傅里叶算法及其实现方法。
This system has adopted the algorithm of digital down convert FFT, so the frequency resolution is improved greatly.
使用先进的数字信号处理器，缩减了分立元件的数量，提高了系统的稳定性和扫频的速度；
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