【正文】
rmance is usually far superior to the fixed filter design using the regular method . In addition, the adaptive filter can also provide nonadaptive methods can not provide a new signal processing capabilities. This course design is to use the powerful puting power of MATLAB software, the use of the RLS adaptive filtering algorithm microphone noise reduction. Aims to develop the way we use puters to handle large data, familiarity with MATLAB count information. Keywords: MATLAB, adaptive filter, RLS algorithm, microphone noise reduction 《信息處理課群綜合訓(xùn)練與設(shè)計(jì)》 5 1 設(shè)計(jì)任務(wù) 給定主麥克風(fēng)錄制的受噪聲污染的語音信號(hào)和參考麥克風(fēng)錄制的噪聲,實(shí)現(xiàn)語音增強(qiáng)的目標(biāo),得到清晰的語音信號(hào)。凡是需要處理未知統(tǒng)計(jì)環(huán)境下運(yùn) 算結(jié)果所產(chǎn)生的信號(hào)或需要處理非平穩(wěn)信號(hào)時(shí),自適應(yīng)濾波器可以提供一種吸引人的解決方法,而且其性能通常遠(yuǎn)優(yōu)于用常方法設(shè)計(jì)的固定濾波器。 時(shí)間安排 : 6月 20 日到 6 月 27 日 理論設(shè)計(jì)與仿真 6月 28 日到 7 月 1 日 撰寫報(bào)告 7月 3 日 答辯 指導(dǎo)教師簽名: 年 月 日 系主任(或責(zé)任教師)簽名 : 年 月 日 目 錄 《信息處理課群綜合訓(xùn)練與設(shè)計(jì)》 2 課程設(shè)計(jì)任務(wù)書 ............................................................................................................... 1 摘要 ................................................................................................................................. 3 Abstract ............................................................................................................................ 4 1 設(shè)計(jì)任務(wù) ....................................................................................................................... 5 2 設(shè)計(jì)要求 ....................................................................................................................... 6 3 基本原理 ....................................................................................................................... 7 自適應(yīng)干擾抵消原理 ............................................................................................ 7 RLS 算法基本原理 ............................................................................................... 8 4 方案論證 ....................................................................................................................... 9 5 功能設(shè)計(jì) ...................................................................................................................... 11 讀取語音文件 ...................................................................................................... 11 算法實(shí)現(xiàn) .............................................................................................................12 6 信號(hào)的獲取 ...................................................................................................................14 7 調(diào)試程序 ......................................................................................................................15 環(huán)境噪聲中的語音波形分析 .................................................................................15 RLS 算法的濾波效果: .......................................................................................17 分別對(duì)增強(qiáng)前后的語音信號(hào)做頻譜分析 .