Method for Frequency Measurement with ApFFT Based on FPGA
The conventional method of frequency measurement based on traditional fast Fourier transform (FFT) cant provide to an ideal performance due to the fence effect and the leakage of frequency spectrum.As an improved algorithm of the traditional FFT,the all phase FFT (apFFT) spectrum analysis has a perfect performance on suppressing the spectrum leakage and the property of phase invariant.In this paper,a novel method for frequency measurement which takes the advantage of all phase FFT is proposed.This method utilizing two largest spectrum lines of the signal from time-domain provides a higher precision than traditional method.In the paper,a corresponding frequency measurement design based on Field Programmable Gate Array (FPGA) is implemented.The functional simulation results show that the design based on FPGA has better performance compared with the traditional method for frequency measurement.
frequency measurement spectrum analysis FFT all phase FFT FPGA spectrum correction method
Meng Wang Xia Zhang
Information Engineering School Communication University of China Beijing, China
国际会议
重庆
英文
1177-1180
2015-12-19（万方平台首次上网日期，不代表论文的发表时间）