基于matlab和雙線性變換的濾波器設計畢業(yè)論文-全文預覽
【正文】 檢測與參數估計等處理，在通信、圖像、語音、雷達等領域都有著十分廣泛的應用。關鍵字：數字濾波器 巴特沃斯 MATLAB 雙線性變換法 Abstract The filter, just as its name implies is to wave filter receive required waveform signal devices. Highpass filter is from the frequency, the amplitude frequency characteristics flat. It makes the signal frequency ponents of higher than almost do not suffer attenuation through, and below the frequency ponents will be greatly decrease. Digital filter is the basis of digital signal processing, used for signal filtered, testing and parameter estimation processing, in munication, image, sound, radar areas such as has the extremely extensive application. Especially in the image processing, data pression aspects has achieved remarkable progress and achievement. Bilinear transformation method is a can overe spectrum aliasing of the design of the digital filter method. This report mainly introduces bilinear transformation method to design digital bart leavenworth qualm, low pass and bandpass FIR filters, introduces the basic process design steps, then carried out in Matlab debugging, realized the design goal. Key word: digital filter bart leavenworth MATLAB bilinear transformation method1濾波器的原理及分類濾波器是一種選頻裝置，可以使信號中特定的頻率成分通過，而極大地衰減其他頻率成分。因此，構成測試系統(tǒng)的任何一個環(huán)節(jié)，諸如機械系統(tǒng)、電氣網絡、儀器儀表甚至連接導線等等，都將在一定頻率范圍內，按其頻域特性，對所通過的信號進行變換與處理。 圖（二）（三）帶通濾波器 它的通頻帶在f1～f2之間。圖（四）帶通濾波器和高通濾波器是濾波器的兩種最基本的形式。對（a）式作傅里葉變換得：假定噪音信號被濾除，即 （c）將（c）式代入（b）式整理得 假定信號頻率成分為：，噪音頻率成分為。巴特沃斯濾波器具有如下特點：①最平響應特性（最大平坦性
物理相關推薦
鄂ICP備17016276號-1