文章基本信息

标题：A Power-Efficient FFT Preprocessing Algorithm Utilizing Analysis Filter Bank
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作者：Chengwu chen ; Yinan Wang ; Xiaoguang Liu 等
期刊名称：MATEC Web of Conferences
电子版ISSN：2261-236X
出版年度：2018
卷号：173
DOI：10.1051/matecconf/201817302047
语种：English
出版社：EDP Sciences
摘要：With the development of high-speed sampling and real-time signal processing technologies, the power consumption for implementing large-point FFT operations is drastically increasing in application systems. This paper presents an FFT preprocessing algorithm based on a multi-channel analysis filter bank, which is implemented by an efficient multi-phase parallel structure. The operating frequency is reduced tofs/Mfor each constituent channel, while the spectrum width and the resolution are maintained. Meanwhile, the valid frequency point can be correctly identified and the resulting error is controlled below -30dB. Compared with the two-dimensional FFT algorithm, the power consumption accelerating factor can reach 2.4~4 by utilizing 4-channel analysis filter bank.