帶阻插值濾波fir的設(shè)計(jì)___數(shù)字信號(hào)處理課程設(shè)計(jì)-文庫(kù)吧
2025-05-17 01:50 本頁(yè)面
【正文】 響應(yīng)是有限長(zhǎng)的，因而可用快速傅里葉變換(FFT)算法來(lái)實(shí)現(xiàn)過(guò)濾信號(hào)，可大大提高運(yùn)算效率。 FIR 也有利于對(duì)數(shù)字信號(hào)的處理，便于編程，用于計(jì)算的時(shí)延也小，這對(duì)實(shí)時(shí)的信號(hào)處理很重要。 FIR 濾波器比較大的缺點(diǎn)就是階次相對(duì)于 IIR 濾波器來(lái)說(shuō)要大很多。 關(guān)鍵詞： 插值；濾波器；阻帶；數(shù)字信號(hào)處理 南華大學(xué)電氣工程學(xué)院課程設(shè)計(jì) ii Abstract: The digital filter is an algorithm or device consists of a digital multipliers, adders and delay units. Digital filter function is to input digital codes discrete signal processing, is has reached the purpose of changing the signal spectrum. Finite Impulse Response (FIR) digital filters and infinite impulse response (IIR) digital filters widely used in digital signal processing systems. IIR digital filter is simple and convenient, but it39。s nonlinear phase, requires the use of allpass phase correction work, and stability is difficult to guarantee. FIR filter has a good linear phase characteristic, making it more and more widespread attention. Finite impulse response (FIR) filter characteristics: both have strict linear phase, and an arbitrary magnitude。 FIR filter unit sample response is finite, and therefore stable filter performance。 as long as after a certain delay, any noncausal finitelength sequence can be turned into the causal sequence of finite length, which can cause the system to achieve。 FIR filter impulse response is limited due to the unit length, which can be used Fast Fourier Transform (FFT) algorithm to achieve the filtered signal , can greatly improve the operation efficiency. FIR is also conducive to the digital signal processing, easy to program, used to calculate the delay is small, it is very important for realtime signal processing. FIR filter relatively large drawback is the order with respect to the IIR filter is much larger. Keywords: Interpolation。Filter。 Stopband。 Digital signal processing 南華大學(xué)電氣工程學(xué)院課程設(shè)計(jì) iii 目 錄 ................................................................ 1 設(shè)計(jì)內(nèi)容 ............................................................................................. 1 設(shè)計(jì)要求 ............................................................................................. 1 ..................................................................................... 1 整體設(shè)計(jì)思路 ..................................................................................... 1 設(shè)計(jì)過(guò)程 ............................................................................................. 2 數(shù)字帶阻指標(biāo) ................................................................................. 2 插值濾波濾波器原理 ......................................................................... 2 插值系統(tǒng)的直接型 FIR 結(jié)構(gòu) ............................................................. 2 插值器的多相 FIR 結(jié)構(gòu) .................................................................... 3 插值器的多級(jí)實(shí)現(xiàn) .......................................................................... 5 整數(shù)倍內(nèi)插的概念和 內(nèi)插方法 .......................................................... 5 內(nèi)插器的輸入、輸出關(guān)系 ................................................................ 6 涉及到的 matlab 函數(shù) ......................................................................... 7 ..................................................................................................... 7 設(shè)計(jì)思路 ............................................................................................. 7 設(shè)計(jì)步驟 ............................................................................................. 8 用 MATLAB 程序?qū)崿F(xiàn) .........
畢業(yè)設(shè)計(jì)相關(guān)推薦
鄂ICP備17016276號(hào)-1