基于matlab的數(shù)字濾波器的設(shè)計(jì)摘要

1、畢業(yè)設(shè)計(jì)說明書（論文）中文摘要在這個(gè)極具挑戰(zhàn)的時(shí)代中，把計(jì)算機(jī)充分運(yùn)用到教學(xué)及工程計(jì)算中，顯然具有重要的意義，而隨著計(jì)算機(jī)技術(shù)的發(fā)展計(jì)算機(jī)軟件在工程設(shè)計(jì)領(lǐng)域的應(yīng)用越來越廣。本設(shè)計(jì)要研究的是基于MATLAB的數(shù)字濾波器的設(shè)計(jì)。則是應(yīng)用計(jì)算機(jī)軟件進(jìn)行編程。首先了解濾波器的基本工作原理，針對(duì)不同數(shù)字濾波器所采用最合適的設(shè)計(jì)方法，設(shè)計(jì)FIR和IIR數(shù)字濾波器，以達(dá)到效果最佳。FIR一般要求信號(hào)具有線性相位，而FIR數(shù)字濾波器則可實(shí)現(xiàn)嚴(yán)格的線性相

2、位，同時(shí)由于脈沖響應(yīng)為有限長，因此還具有永遠(yuǎn)穩(wěn)定的特性，鑒于此FIR主要解決了線性相位和穩(wěn)定性的問題否則多用IIR數(shù)字濾波器來實(shí)現(xiàn)。根據(jù)這個(gè)特點(diǎn)設(shè)計(jì)FIR和IIR濾波器，利用窗函數(shù)來設(shè)計(jì)FIR數(shù)字濾波器；利用模擬濾波器來設(shè)計(jì)IIR數(shù)字濾波器。濾波是信號(hào)處理中最基本又極為重要的技術(shù)，利用濾波器技術(shù)可以從復(fù)雜的信號(hào)中提取出所需要的信號(hào)，抑制不需要的信號(hào)。絕大多數(shù)傳感器輸出的信號(hào)，在使用過程中，都必須進(jìn)行濾波。所以濾波器是具有一定傳輸選擇特性

3、的、對(duì)信號(hào)進(jìn)行加工處理的裝置、它允許輸入信號(hào)中的一些成分通過，抑制或衰減另一些成分。其功能是將輸入信號(hào)變換為人們所需要的輸入信號(hào)。本設(shè)計(jì)主要給出了FIR數(shù)字濾波器與IIR數(shù)字濾波器的設(shè)計(jì)方法和原理。關(guān)鍵詞數(shù)字濾波器MATLABFIRIIR畢業(yè)設(shè)計(jì)說明書（論文）外文摘要TitleDesignofDigitalFilterBasedOnMatlabAbstractInthisverychallengingtimemakingfulluseo

4、fcomputerteachingengineeringcalculationObviouslyitisofgreatsignificancewiththedevelopmentofcomputertechnology.Computersoftwareintheareasofengineeringdesignusedwidely.ThedesignstudyisbasedonMATLABdigitalfilterdesign.Itist

5、heapplicationofcomputersoftwareprogramming.FilterallknowthebasicprinciplefdifferentdigitalfilterusedinthemostsuitabledesignmethodDesignofFIRIIRfilterindertoachievethebesteffect.FIRsignalistypicallyrequirelinearphaseFIRdi

6、gitalfilterwhichcanbeachievedbystrictlinearphaseMeovertheimpulseresponseofthefinitelengthitwillalsohavestableacteristicsInviewofthismainlytosolvetheFIRlinearphasestabilityoftheproblemwithmeIIRdigitalfilteristobeachieved.

7、BasedontheabovefeaturesofthedesignFIRIIRfiltersusingwindowfunctiondesignFIRdigitalfiltersimulationsofIIRfilterdesigndigitalfilters.Thefilterisinthesignalprocessingthemostbasicextremelyimptanttechnologymaywithdrawthesigna

8、lusingthefiltertechnologyfromthecomplexsignalwhichneedssuppressessignalwhichdoesnotneed.Theoverwhelmingmajitysensoutputsthesignalintheuseprocessallmustcarryonthefilter.Therefethefilterishasthecertaintransmissionchoiceact