基于DSP的IIR數(shù)字濾波器的設(shè)計(jì)

電子通信論文編號(hào):TX208 論文字?jǐn)?shù):6167,頁(yè)數(shù):20

目錄
摘　要 I
Abstract II
第1章 緒論 1
1.1 課題來(lái)源 1
1.2 課題特點(diǎn)及意義 1
1.3課題內(nèi)容 2
1.4課題實(shí)現(xiàn)方法 2
第2章 概要設(shè)計(jì) 4
2.1基于DSP數(shù)字濾波器系統(tǒng)框圖 4
2.2 IIR數(shù)字濾波器的MATLAB實(shí)現(xiàn) 4
2.3 模/數(shù)接口設(shè)計(jì) 5
2.3基于DSP的數(shù)字濾波器的設(shè)計(jì) 6
第3章 詳細(xì)設(shè)計(jì) 8
3.1 IIR數(shù)字濾波器的MATLAB設(shè)計(jì) 8
3.2 基于DSP的IIR濾波器設(shè)計(jì) 9
第4章 仿真結(jié)果 12
4.1 輸入波形圖 12
4.2 輸出波形圖 13
參考文獻(xiàn) 14
致謝 15

摘　要
數(shù)字濾波器在各種數(shù)字信號(hào)處理中發(fā)揮著十分重要的作用，數(shù)字濾波器設(shè)計(jì)一直是信號(hào)處理領(lǐng)域的重要研究課題。常用的數(shù)字濾波器有FIR濾波器和IIR濾波器,其中IIR數(shù)字濾波器因具有結(jié)構(gòu)簡(jiǎn)單、占用存儲(chǔ)空間少、運(yùn)算速度快、較高的計(jì)算精度和能夠用較低的階數(shù)實(shí)現(xiàn)較好的選頻特性等特點(diǎn)[1]，得到了廣泛應(yīng)用。DSP芯片有適合于數(shù)字信號(hào)處理的軟件資源和硬件資源，是實(shí)現(xiàn)數(shù)字信號(hào)處理的重要途徑[2]。目前所見(jiàn)文獻(xiàn)，多數(shù)為濾波器的模型設(shè)計(jì)，所得結(jié)果也是在MATLAB等實(shí)驗(yàn)環(huán)境下模擬仿真完成的，帶有很大的局限性。本文討論IIR數(shù)字濾波器在DSP上的實(shí)現(xiàn)思路，并對(duì)其實(shí)現(xiàn)方法進(jìn)行了分析。該論文敘述了IIR數(shù)字濾波器的設(shè)計(jì)原理及其在DSP上的實(shí)現(xiàn)思路，并對(duì)用DSP實(shí)現(xiàn)IIR數(shù)字濾波的方法進(jìn)行了分析。用MATLAB計(jì)算出IIR數(shù)字濾波器的系數(shù)，考慮到溢出問(wèn)題，采用級(jí)聯(lián)的形式對(duì)濾波器進(jìn)行分解，最后在TMS320VC5416 DSP上得以實(shí)現(xiàn)，并通過(guò)CCS(come composer studio)的輸入輸出功能和RTDX(real-time data exchange)的功能保證實(shí)現(xiàn)結(jié)果和仿真結(jié)果的一致性。
關(guān)鍵字：DSP  Matlab  IIR

Abstract
Digital filter in digital signal processing of various plays very important role in design, digital filter is an important research field of signal processing. Common digital filter has FIR filters and IIR filter, including IIR digital filter is occupied by simple structure, less storage space, faster, higher precision and can be used for realization of low frequency characteristics choose good characteristics [1], the widely used. DSP is suitable for digital signal processing software and hardware resources, is the resource of the realization of digital signal processing is an important way to [2]. Currently, most of which saw filters, model design results in MATLAB simulation experimental environment etc, with great limitations. Based on DSP IIR discussion on digital filter, and the realization of its realization methods are analyzed. This paper describes the design principle of IIR digital filter and the realization of digital signal processor (DSP), and the realization of digital filtering IIR DSP methods are analyzed. MATLAB IIR calculated the digital filter coefficients, considering the overflow problems, using a cascade of filter decomposition, finally realized in the TMS320VC5416 DSP and come by CCS (composer studio) input and output functions and RTDX (real data exchange) - time function ensure the consistency of the results and simulation results.

Keyword: DSP  Matlab  IIR