基于复解析带通滤波器的ZOOM-FFT算法的分析和实现  

Analysis and Implementation of ZOOM-FFT Algorithm Based on Complex Analytic Band-pass Filter

作　　者：徐婷[1] 

机构地区：[1]电子科技大学电子工程学院,成都611731

出　　处：《空间电子技术》2012年第1期63-67,共5页Space Electronic Technology

基　　金：中央高校基本科研业务费专项资金资助项目(ZYGX2010J020);四川省科技厅科技支撑项目(2009GZ0149;2010GZ0149)

摘　　要：文章介绍了基于复解析带通滤波器的ZOOM-FFT算法原理;讨论了该算法的核心部分:等波纹复解析带通滤波器的设计方法,从而能有效地控制滤波器的通带和阻带特性。通过判断是否需要调整细化中心频率(如果需要,调整中心频率)-构造复解析带通滤波器-选抽滤波-若中心频率未经调整,移频—FFT的流程,在TMS320DM6437 DSP上实现了ZOOM-FFT算法,从而对信号频谱进行了细化。In order to zoom spectrum,the principle of ZOOM-FFT algorithm based on complex analytic band-pass filter is investigated in this paper.The core of this algorithm that is the design methods of complex analytic band-pass filter is then discussed.So the passband and stopband characteristics effectively can be controlled.ZOOM-FFT algorithm is implemented on TMS320DM6437 DSP by process of determining whether there is a need to adjust the zoom center frequency(if yes,adjust the center frequency)-constructing a complex analytic band-pass filter-selected pumping and filtering-if not adjust the center frequency,frequency shift-FFT.The spectrum of signals is detailed in this means.

关 键 词：ZOOM-FFT 滤波器 频谱 DSP 

分 类 号：TN7[电子电信—电路与系统]