一种用于射电频谱分析的高速FFT实现算法

A New High-Speed FFT Algorithm for Analyzing Solar Radio Spectra

提出了一种用于高速射电频谱分析的FFT实现算法,基于奇偶分开的FFT变换算法。采用N点FFT变换来实现4N点实信号的FFT变换,从而在FPGA(现场可编程门阵列)硬件里实现了高速FFT变换算法。仿真分析表明,新算法得到了良好的效果,明显地提高了硬件的利用效率。

In this paper, a new high-speed FFF algorithm is proposed for analyzing solar radio spectra. Based on separately treating even- and odd-number points in a data sequence, the 4N-point FFT transformation is achieved by two N-point FFT transformations to analyze real-time radio spectra in an FPGA. Simulations show that the new algorithm can yield accurate results and have a higher efficiency than common algorithms.