摘要
研究了多速率信号处理中的内插和抽取技术。针对带通滤波器的非理想特性,采用单一抽取倍数抽取会产生抽取盲区的弊端,提出采用多个抽取倍数抽取的方法来实现带通信号的无盲区整带抽取,并从理论上推导了实现无盲区抽取时所需的抽取因子的个数及大小,结果表明,只要采用D=f_s/(2B)个盲区抽取倍数D_m(m=0,1,…,D-1)和一个主抽取倍数D,就可实现对在(0,f_s/2)整个频带内带宽为B的信号的"无盲区"整带抽取,仿真结果验证了推导结论的正确性。
Interpolation and decimation in the multirate signal processing technologies are researched in this paper.According to nonidcal characteristic of the band pass filter and the shortcoming that using a single decimation factor will produce the decimation blindness,we use multiple decimation factors to realize none-blindness integral band decimation of band pass signal.The number of decimation factors and their value ate deduced.Our deduction shows that D(is equal to f_(?)/(2B))blindness decimation factors,D_m(m=0,1,…,D-1), and one main decimation factor D are needed to be used to realize none-blindness integral band decimation of band pass signal which bandwidth is B in the spectrum of(0,f_(?)/2).Simulation results validate the deduction.
出处
《电子科技大学学报》
EI
CAS
CSCD
北大核心
2007年第S2期1068-1070,1088,共4页
Journal of University of Electronic Science and Technology of China
基金
国家自然科学基金(0702060)
关键词
抽取
内插
多速率信号处理
软件无线电
decimation
interpolation
multirate signal processing
software radio
