低通有限沖激響應(yīng)濾波器fir于dsp上的實(shí)現(xiàn)畢業(yè)論文-全文預(yù)覽
【正文】 初始狀態(tài)才能保證芯片能正常運(yùn)行。靈敏度 濾波電路由許多元件構(gòu)成，每個(gè)元件參數(shù)值的變化都會(huì)影響濾波器的性能。①對(duì)低通濾波器通帶增益，一般指ω=0時(shí)的增益；高通指ω→∞時(shí)的增益；帶通則指中心頻率處的增益。②阻帶截頻：為阻帶與過渡帶的邊界點(diǎn)，在該點(diǎn)信號(hào)衰耗下降到規(guī)定的下限。F I R濾波器的設(shè)計(jì)方法有窗函數(shù)設(shè)計(jì)法和頻率采樣設(shè)計(jì)法。數(shù)字濾波是數(shù)字信號(hào)處理的基本方法。為了得到線性相位特性，對(duì)IIR濾波器必須另外加相位校正網(wǎng)絡(luò)，是濾波器設(shè)計(jì)變的復(fù)雜，成本也高。 Design index 目 錄摘 要 IAbstract II第一章 緒論 1 本設(shè)計(jì)的研究意義 1 基本原理 1 技術(shù)指標(biāo) 2第二章 低通有限沖激響應(yīng)濾波器FIR的DSP實(shí)現(xiàn) 4 程序設(shè)計(jì) 4 窗函數(shù)法 5 DSP實(shí)現(xiàn) 7第三章 總 結(jié) 11 11 12參考文獻(xiàn) 13致 謝 14第一章 緒論 本設(shè)計(jì)的研究意義一個(gè)實(shí)際的應(yīng)用系統(tǒng)中,總存在各種干擾，所以在系統(tǒng)設(shè)計(jì)中,濾波器的好壞將直接影響系統(tǒng)的性能。 關(guān)鍵詞： FIR濾波器；非遞歸型；單位脈沖響應(yīng)；線性相位特性；設(shè)計(jì)指標(biāo)AbstractFIR filter is limited long of unit impulse response in structure filter, yes. It can be in range characteristics random design at the same time, ensure accurate strictly linear phase. In the actual application of very important, such as in data munication, image processing, speech signal processing, etc, are all too often requires a linear phase characteristic. And because the FIR filters Co., LTD, system of long do not exist the unstable phenomenon, we can always use causal stable system to realize the FIR filter. FIR the shortage of the main lies in its good performance is higher order number for the cost for the same, FIR filters, required the order number of high than IIR filter 2 ~ 5 times, the signal delay too large. Therefore, in the same performance that under the premise of as far as possible, to reduce the order number FIR digital filters is one of the goals of the design. The biggest drawback IIR digital filter is not easy to make linear phase, and modern images, sounds, and data munications to the requirements of the linear phase is mon, far higher than the past simulation of munication. For this reason, make have linear phase FIR digital filters to get a development and the wides
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