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學(xué)校代碼 學(xué)號(hào) 本科 學(xué)年論文 題 目 基于 DSP的 IIR 濾波器設(shè)計(jì) 院 系 專業(yè)名稱 年 級(jí) 學(xué)生姓名 指導(dǎo)教師 學(xué)年論文指導(dǎo)教師評(píng)閱意見(jiàn) 學(xué) 生 姓 名 專 業(yè) 班 級(jí) 學(xué) 號(hào) (論文)題目 基于 DSP 的 IIR 濾波器設(shè)計(jì) 指導(dǎo)教師 教師職稱 學(xué)年 論 文 評(píng)語(yǔ) 評(píng)定成績(jī): 指導(dǎo)教師簽名: 年 月 日 基于 DSP的 IIR 濾波器設(shè)計(jì) 摘 要 當(dāng)前我們正處于數(shù)字化時(shí)代,數(shù)字信號(hào)處理技術(shù)受到了人們的廣泛關(guān)注,其理論及算法隨著計(jì)算機(jī)技術(shù)和微電子技術(shù)的發(fā)展得到了飛速的發(fā)展,被廣泛應(yīng)用于語(yǔ)音圖象處理、數(shù)字通信、譜分析、模式識(shí)別、自動(dòng)控制等領(lǐng)域。數(shù)字濾波器是數(shù)字信號(hào)處理中最重要的組成部分之一,幾乎出 現(xiàn)在所有的數(shù)字信號(hào)處理系統(tǒng)中。 數(shù)字濾波是語(yǔ)音和圖象處理、模式識(shí)別、譜分析等應(yīng)用中的一個(gè)基本處理算法,在數(shù)字信號(hào)處理中,占有極其重要的地位。數(shù)字濾波器是數(shù)字信號(hào)處理中最重要的組成部分之一。 本文論述的是通帶在 1000~5000Hz, 通帶內(nèi)損耗不大于1dB,阻帶衰減不小于 20dB 的帶通數(shù)字濾波器。 文中闡述了 IIR 數(shù)字濾波器的設(shè)計(jì)思想,介紹了用 MATLAB 實(shí)現(xiàn)的過(guò)程,對(duì)數(shù)字濾波器的推廣應(yīng)用有一定的促進(jìn)作用。 本次基課程設(shè)計(jì)將完成數(shù)字切比雪夫一、切比雪夫二及巴特沃斯帶通IIR 濾波器的設(shè)計(jì),用 MATLAB 進(jìn)行仿真,并 在 DSP 上編程實(shí)現(xiàn) 。 關(guān)鍵字 :數(shù)字濾波器, IIR, MATLAB, CCS DESIGN OF IIR DIGITAL FILTER BASED ON DSP Author Tutor: Abstrct We are currently in the digital age, digital signal processing technology by the people39。s extensive concern, its theory and the algorithm is along with the puter technology and microelectronics technology development have developed rapidly, is widely used in speech image processing, digital munications, spectrum analysis, pattern recognition, automatic control, etc. Digital filter is digital signal processing in one of the most important part, almost appear in all of digital signal processing system. Digital filter is the voice and image processing and pattern recognition, spectral analysis of the application of such as a basic processing algorithms, in digital signal processing, occupies an extremely important role. Digital filter is digital signal processing in one of the most important part. In this paper, the design of the digital filter IIR thought, this paper introduces the process of MATLAB, the popularization and application of the digital filter is of certain stimulative effect. The base course design will finish digital chebyshev a, chebyshev 2 and bart wo bandpass IIR the design of filter, the linear transformation and the infinite impulse response IIR principle plete design, and use of MATLAB simulation, and in the programming on DSP. Keywords: Digital filters, IIR, MATLAB, CCS 目 錄 1 緒論 .......................................................................................................................... 1 IIR 數(shù)字濾波器 選題意義 .................................................................................... 2 數(shù)字濾波器的發(fā)展及前景 ............................................................................. 3 2 數(shù) 字濾波器基本理論 .............................................................................................. 5 數(shù)字濾波器 概念 ................................................................................................. 5 數(shù)字濾波器的類型 .............................................................................................. 6 濾波器的設(shè)計(jì) ...................................................................................................... 6 濾波器的設(shè)計(jì)步驟 .............................................................................................. 7 脈沖響應(yīng)不變法 .................................................................................................. 7 雙線性變換法 ...................................................................................................... 9 濾波器的特性及使用函數(shù) ................................................................................ 11 3 DSP芯片概述 ....................................................................................................... 13 芯片定義 ................................................................................................... 13 芯片主要特點(diǎn) ........................................................................................... 13 芯片的優(yōu)缺點(diǎn) ........................................................................................... 13 芯片的選擇 ............................................................................................... 15 系統(tǒng)構(gòu) 成 ................................................................................................... 16 4數(shù)字濾波器的實(shí)現(xiàn) ................................................................................................... 17 在 MATLAB 上做算法仿真 .............................................................................. 17 在 DSP 上編程實(shí)現(xiàn) ........................................................................................... 25 編程心得 .......................................................................................................... 27 編程思想 ............................................................................................................ 27 5 結(jié)論 .......................................................................................................................... 28 致 謝 .......................................................................................................................... 29 參考文獻(xiàn) ...................................................................................................................... 30 附錄 .............................................................................................................................. 31 第 1 頁(yè) 1 緒論 隨著信息時(shí)代和數(shù)字世界的到來(lái),數(shù)字信號(hào)處理已成為當(dāng)今一門(mén)極其重要的學(xué)科和技術(shù)領(lǐng)域。目前 數(shù)字信號(hào)處理在通信、語(yǔ)音、圖像、自動(dòng)控制、雷達(dá)、軍事、航空航天、醫(yī)療和家用電器等眾多領(lǐng)域得到了廣泛的應(yīng)用。在數(shù)字信號(hào)處理中起著重要的作用并已獲得廣泛應(yīng)用的是數(shù)字濾波器( D