实时频谱分析仪中并行FFT算法的FPGA设计  

FPGA Design of Parallel FFT Algorithm in Real-time Spectrum Analyzer

作　　者：张亚洲[1] 张超[1,2] 王保锐[1,2] 向长波[1,2] 

机构地区：[1]中国电子科技集团公司第四十一研究所,青岛266555 [2]电子测试技术重点实验室

出　　处：《单片机与嵌入式系统应用》2016年第5期23-26,共4页Microcontrollers & Embedded Systems

摘　　要：针对实时频谱分析仪对FFT计算速度高的需求提出一种并行FFT计算的方法,采用数据分开并行处理的方式达到快速计算傅里叶变换的效果。通过对比分析,本方案能够在不多占用FPGA资源的前提下成倍提高FFT的运算速度,从而提高重叠FFT过程中的重叠点数。仿真分析证明,本方案能够有效提高实时频谱分析仪中的信号处理速度,提升时间分辨率指标。In view of the demand for high-speed of FFT computing of the real-time spectrum analyzer,a parallel FFT computing method is proposed. The effort of fast calculation of Fourier transform is achived by using separate data in the parallel processing. The advantages of this scheme is illustrated by the comparative analysis. This solution can improve the computing speed of FFT,which does not take up more FPGA resources. Therefore,overlap points can be increased in the process of overlapping FFT. The simulation analysis proves that the solution can effectively improve the signal processing speed and time resolution in the real-time spectrum analyzer.

关 键 词：实时频谱分析仪 并行FFT 重叠率 XC6VSX315T 

分 类 号：TM935.21[电气工程—电力电子与电力传动] TN791[电子电信—电路与系统]