High Efficient and Real-Time Realization of Zoom FFT Based on FPGA
The paper proposed a novel method for implementing Zoom FFT with field programmable gate array (FPGA) for high performance spectral analysis. A scheme of multistage decimation Zoom FFT was given by using the parallel pipelining processing character of FPGA to reduce the computational complexity of traditional Zoom FFT. Meanwhile, a polyphase filter suitable for high decimationtimes was designed, and then the polyphase filter and an efficient cascaded integrator-comb (CIC) filter were applied into every stage of decimation structure. Simulation result indicates that compared with single-stage decimation structure, our methods error of amplitude analysis can be lower than ldB for 200 of decimation-times, so that maximum Zoom-times and precision can be improved. The method can reduce FPGA resources consuming and achieve high processing speed.
FPGA zoom FFT multistage decimation polyphase filtering CIC filtering
Dong Pei Shuo Yang Hongwu Yang Quanzhou Wang Manman Li
College of physics and Electronic Engineering Northwest Normal University Lanzhou, Gansu, China
国际会议
太原
英文
669-673
2010-10-22（万方平台首次上网日期，不代表论文的发表时间）