多速率信号处理的设计与实现Design and implementation of multirate signal processingWord文件下载.docx

1、Experimental garden for College StudentsThreeDesign and implementation of multirate signal processingChen Yiou, Li GuangjunUniversity of Electronic Science and technology of China, Chengdu, 610054Thirty-threeAbstract: the multi rate signal processing is the basic theory of software radio, this paper

2、 introduces an efficient processing method of multi rate signal, which uses C IC filter and HB filter, F IR filter and polyphase filters for decimation and interpolation in order to achieve the purpose of changing the signal rate. This paper introduces the basic principle of various filters, analyze

3、s the problems needing attention in the design and implementation, and gives the design results of digital down conversion with this multirate signal processing method. Keywords: multi rate signal processing; C IC filter; HB filter; decimation; interpolation; polyphase filtering in the graph classif

4、ication number: TN92 document identification code: A article number: 1672-4550 （2006） 06 - 0113 - 04D esign and Rea Liza tion of M ulti - Ra te S igna L Processi g n（University of Electronic Science and Technology of China Chengdu Abstract: M ulti 610054） - Rate signal p rocessing is a basic theory

5、in softw a re rad io. This paper introduces a m ethod of multi - rate signal p rocessing which uses C IC filters, HB filters, F I filters and polyphase fil2 R of using this technique to design a digital down converter ters reach the goal. To of decim ation and interpolation, in order to change the r

6、ate of digital signals It in2 troduces the structures of the. Typ ical filters, analyzes some relevant issues, and brings forward the result Key words: multi - rate signal p rocessing; C I filter; HB filter deci; ate; interpolate; polyphase C m CHEN Yi2, L I Guang2jun ouC IC1 IntroductionMake spectr

7、um worse. Therefore, the essence of multirate signal processing is to cooperate with several typical filters through decimation and interpolation in time domain so as to achieve the purpose of signal rate conversion. A typical multirate signal processing architecture is shown in figure 1. Filter n.H

8、B extractionMulti rate signal processing is the basic theory of software radio system, it through the interpolation and extraction rate of change of the digital signal in software radio system to adapt to the different modules of the signal to the different rates of 1 - 2, is an important technology

9、 for digital down conversion and digital frequency. In practical engineering, in order to change the rate of digital signals and avoid signal frequency aliasing, usually adopt the following filter: C IC decimation filter, HB filter 2 times extraction or within the multiphase structure of F filter an

10、d IR filter.Wave filterFilter n.F IRPolyphase filter bankHB interpolationFig. 1 a typical multirate signal processing architectureAlgorithm and implementation of more than 2 rate signal processingBecause the C IC filter is simple in structure and high in frequency, it is used in the first stage of h

11、igh speed digital signal processing. After its integer multiple decimation,The rate of high-speed signals is greatly reduced. HB decimation filter computation than the general F IR filter small half, processing rate is higher, but because each filtersection only 2 times the extraction, so using HB f

12、ilters N cascade of signalsThe basis of multirate signal processing is decimation and interpolation, which can be directly extracted and interpolated in time domain, which leads to the expansion and compression of the frequency domain,ePub 2006 - 08 - 02author Chen Yiou （1982 -）, female, graduate st

13、udent, the main research direction is digital signal processing and ASIC design.- 113-December 2006 Experim ent Science & Technology Sixth2 times decimation. Since the C IC filter and the HB filter are all aliasing filters, the signal needs to be filtered by the F IR filter to eliminate the unwanted

14、 frequency components, and then the next step is to be processed. The polyphase filter banks can convert the fractional sampling rate, make the rate conversion more flexible, and also make the output speed of the whole system meet the needs of special applications. After the polyphase filter bank, the cascaded HB interpolation filter can also be used to improve the time resolution of the output signal. Next, the algorithm of each filter and the problems to be noticed in the design and implementation are introduced in detail. 211 integral comb filter （C IC filter