计算机技术与发展2008，Vol.18Issue(1)：1-6,6.
应用于时频分析的低功耗短时傅里叶变换处理器
A Low Power Short Time Fourier Transform Processor for Time-Frequency Analysis
摘要
Abstract
A discrete short time Fourier transform (STFT) processor for time-frequency analysis is proposed in this paper. To overcome the drawbacks of previous discrete STFT algorithms and architectures, a new architecture based on fast Fourier transform (FFT) array is presented. An optimized single-path delay feedback (SDF) FFT architecture is proposed for high frequency resolution, which reduces feedback FIFO depth and butterfly units' number in comparison with the traditional one. Along with exploiting the symmetry of window function and performing hardware combination, power consumption decreased by 20%. The processor has been implemented with SMIC 0.18μm standard cell library, static timing analysis and dynamic simulation with timing back-annotated show that under worst-case conditions, 200MHz clock rate can be achieved, which means that the real-time time-frequency analysis demand can be fulfilled under the same sample frequency.关键词
短时傅里叶变换/时频分析/低功耗Key words
short time Fourier transform/ time-frequency analysis/low power分类
信息技术与安全科学引用本文复制引用
张师群,于敦山,盛世敏..应用于时频分析的低功耗短时傅里叶变换处理器[J].计算机技术与发展,2008,18(1):1-6,6.基金项目
国家863计划项目(2003AA1Z) （2003AA1Z）
