:数字下变频技术是软件无线电的关键技术之一. 数字下变频技术是将宽带高速数据流信号变成窄带低速

数据流信号,这个过程就是信号的抽取. 实现抽取的关键问题是如何实现抽取前的数字滤波,特别是多级抽取时滤

波器的设计与实现. 对于一个具体信号进行多级抽取时滤波器的设计给出了一个可行的方案-: Digital down-conversion software radio technology is one of the key technologies. Digital down-conversion technology is a broadband high-speed data streams to signal low-speed data stream into a narrow-band signal, this process is the signal extraction. The realization of extraction, the key question is how to achieve pre-extraction digital filtering, especially when Multistage Decimation Filter Design and Implementation. For a specific signal when Multistage Decimation filter design are given a feasible solution