递归算法的参数设置  

Parameter setting of recursive algorithm

作　　者：王宏伟[1] 赵国庆[1] 

机构地区：[1]西安电子科技大学电子对抗研究所,陕西西安710071

出　　处：《电波科学学报》2010年第6期1187-1192,1234,共7页Chinese Journal of Radio Science

基　　金：十一五武器装备预研基金(9140A07020806DZ01)

摘　　要：提出了基于循环迭代运算的多路并行递归算法,代替传统的快速傅立叶变换(FFT)算法,进行有限长数据的离散傅立叶变换(DFT)。递归算法具有数据存储量少、计算量小、资源占用量与工作参数变化无关等特点。计算机仿真结果表明:递归算法不仅使所分析的频率在频率轴上可以选择任意实数值,而且时间分辨率和频率分辨率可调可控。递归算法的工作参数可以依据战术环境灵活设置与调整,非常适合对局部频段实时地进行信号检测、时频分析和精确的时、频参数测量,也可以和其它已有的算法配合使用。Instead of traditional fast fourier transform（FFT） algorithm,the multi-path parallel recursive algorithm based on iterative operation is proposed to perform discrete fourier transforms（DFT） of finite length data.Computer simulation show that the assigned frequency of each path can be selected as real value expediently on the frequency axis in multi-path parallel iteration arithmetic and the work parameter can be rectified expediently according to tactical need.With controllable time-frequency resolution,the iteration algorithm has very strong adjustability and can cooperate with other effectual algorithms.Moreover,high speed,low storage and resource occupation independent of parameter make this algorithm suitable for real-time time-frequency spectrum analysis of local frequency band and accurate time-frequency parameter measure.

关 键 词：递归算法 快速傅立叶变换(FFT) 时频分析 参数测量 

分 类 号：TN971.6[电子电信—信号与信息处理]