課程設(shè)計-基于blackman窗的fir數(shù)字低通濾波器設(shè)計-在線瀏覽
2025-03-06 04:46本頁面
【正文】 序：wst=*pi。deltaw=wstwp。 %按布萊克曼窗計算所需的濾波器長度N=N0+mod(N0+1,2)。wc=(wst+wp)/2。 %求理想脈沖響應(yīng)wdbla=(blackman(N))39。 %設(shè)計的脈沖響應(yīng)應(yīng)為理想脈沖響應(yīng)與窗函數(shù)乘積[db,mag,pha,grd,w]=myfreqz(h,[1])。 %頻率分辨率Rp=(min(db(1:wp/dw+1))) %檢驗通帶波動As=round(max(db(wst/dw+1:501))) %檢驗最小阻帶衰減figure(1)subplot(2,2,1)。title(39。) %繪制布萊克曼窗axis([0 N1 0 ])。w(n)39。text(N+1,0,39。)subplot(2,2,2)。title(39。) %繪制實際脈沖響應(yīng)axis([0 N1 ])。n39。ylabel(39。)subplot(2,2,3)。 %繪制幅度響應(yīng)。幅度響應(yīng)（單位：dB)39。grid。xlabel(39。)。分貝數(shù)39。XTickMode39。manual39。XTick39。YTickMode39。manual39。YTick39。plot(w,pha)。相位響應(yīng)39。 %繪制相頻特性axis([0 2 4 4])。頻率（單位:pi)39。ylabel(39。)6 調(diào)試分析設(shè)計低通濾波器時首先要計算出過渡帶寬，然后查表得到所設(shè)計窗函數(shù)所需要的階數(shù)，不同的窗函數(shù)所設(shè)計的濾波器的形狀各有差異，尤其在主瓣寬度、旁瓣的形狀以及主瓣與旁瓣的高度差上有比較明顯得差別，實際應(yīng)用中應(yīng)根據(jù)實際情況，折衷處理，兼顧各項指標(biāo)。而在信號處理中，對離散序列的數(shù)據(jù)截斷是通過序列與窗函數(shù)相乘來實現(xiàn)的。wp=*pi，運行出錯，錯誤在主程序最后一行：axis([0 2 4 4])。頻率（單位:pi)39。ylabel(39。)，最后檢查出來為標(biāo)點出錯，應(yīng)為英文輸入法下的標(biāo)點運行結(jié)果(圖):參考文獻(xiàn)[1]劉泉 《信號與系統(tǒng)》 高等教育出版社 2006 [2] 丁玉美，高西全編著. ：西安電子科技大學(xué)出版社，2000[3]劉泉 《數(shù)字信號處理原理與實現(xiàn)》 電子工業(yè)出版社 2005[4] 黃文梅，熊桂林，楊勇編著. ：國防科技大學(xué)出版社[5] 張宗橙，張玲華，曹雪虹編著. 數(shù)字圖像處理與應(yīng)用。作為一個電子信息工程專業(yè)的學(xué)生，數(shù)字信號處理是我們的重要專業(yè)課程，是我們將來從事通信事業(yè)的基本保障。MATLAB包含的幾十個工具箱，覆蓋了通信，自動控制，信號處理，圖象處理，財經(jīng)，化工，生命科學(xué)等科學(xué)技術(shù)領(lǐng)域，汲取了當(dāng)今世界這些領(lǐng)域的最新研究成果，已經(jīng)成為從事科學(xué)研究和工程設(shè)計不可缺少的工具軟件?？傊?，無論是從教學(xué)知識掌握出發(fā)，還是從對MATLAB的應(yīng)用出發(fā)，通過這次學(xué)習(xí)，我不但掌握了基于Blackman窗的FIR數(shù)字帶通濾波器設(shè)計的基本知識及其實際應(yīng)用的技巧，還提高了自己的編程和寫報告的能力，收獲不小,也鞏固了所學(xué)知識。 you don39。 your employer dismisses you and you think that you have been dismissed unfairly.For more information about dismissal and unfair dismissal, seetagainst the disciplinary action your employer has taken against you. However, if you win your case, the tribunal may reduce any pensation awarded to you as a result of your failure to appeal.Remember that in most cases you must make an application to an employment tribunal within three months of the date when the event you are plaining about happened. If your application is received after this time limit, the tribunal will not usually accept it.If you are worried about how the time limits apply to you, take advice from one of the organisations listed underFurther help.If you are being represented by a solicitor at the tribunal, they may ask you to sign an agreement where you pay their fee out of your pensation if you win the case. This is known as at charge you more than 35% of your pensation a damagesbased agreement, you should make sure you39。To find your nearest CAB, including those that give advice by , click onEmployment tribunals.The (lack of) air up there Watch mCayman Islandsbased Webb, the head of Fifa39。s 150th anniversary celebrations and will attend City39。s about how he felt and I would like to speak to him first to find out what his experience was.Uefa hasfor the racist behaviour of
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