【正文】 al. The basic LMS algorithm is given by )()()()( nWnXndne T?? )()(2)()1( nXnenWnW ???? Where w (n) is the weight value at this time, W(n+1) is the weight value at next time . ? 0 is called the stepsize. 4 Filter Design with MATLAB When designing digital filter, MATLAB is usually used to carry on the assistance design and the simulation. According to above design philosophy, a 10order adaptive noise canceller was designed. Input signal, ns xxx ?? where )* (10 nx s ?? ,)(nrandxn ? , dealing with 100 sample. Desired output of filter is)* in (*10 nxy s ?? ,The partial codes of the adaptive FIR filter design with MATLAB as follows: M = length(x)。 h= zeros(1,N)。 for n = N:M %adaptive algorithm x1=x(n:1:nN+1)。 %output signal e(n)=d(n)y(n)。 %adjust weight end Simulation waveform are given in Fig 3 Fig 3(a) Input signal X(n) Fig 3(b) Desired Response Signal d(n) Fig 3(c) Output Signal y(n) Fig 3(d) Error Signal e(n) The algorithm can be verified and input data of analog filter can be provided for designing of the DSP assemble language through MATLAB simulation at the same time. 5 Application of Adaptive FIR Filter in TMS320VC5402 hardware system based on TMS320VC5402 TMS320VC5402 is 16bit, fixedpoint DSP chip ,and it is the fifth generation of products of TI Company, its core supply is and IO supply is 。 onchip peripherals contain: an enhanced 8bit hostport interface (HPI8), two multichannel buffered serial ports (McBSPs), two hardware timers and so on. Fig 4 Structure of system Fig 4 shows the structure of hardware design system. The system consists of TMS320VC5402 and other peripherals. The TLC320AC01 is analog interface circuit (AIC) .This device integrates a 14bitresolution ADC and DAC, a bandpass switchedcapacitor ant aliasing input filter, a lowpass switchedcapacitor outputreconstruction filter. The internal circuit configuration and performance parameters are determined by reading control information into the eight available data registers。 EPROM is 32K8bit, with TMS320VC5402 pose of 32KB Boot loader in the address range 8000h–0FFFFh。 The LMS instruction can be explained by MAC Xmem+ , Ymem+..B。 A= (*coeff+A) 16} , Where Xmem points to coefficient, and Ymem points to signal. The LMS algorithm calculates the filter output and updates each coefficient in the filter in parallel. Due to TMS320VC5402 is fixedpoint DSP, so input data, refer data and stepsize need to take format , then these data must be changed fixedpoint format, respectively multiply by 215. Circular addressing and overflow would be noted in assemble program. Using MATLAB verify algorithm, and obtaining sample values of input signal and desired signal, copying these data to assemble program, pile assemble file, parts of assemble codes given by: loop: LD 0,B STM 8,BRC 。A=u*e*x LMS *coeff,*input+ 。load coefficient to coff_buffer ||MPY *input,A LMS *coeff,*input+ 。store final coefficient STH B,*output 。load refer data SUB *output+,A 。 pute u*e(n) STH A,deltau LD deltau,T 。modify input buffer pointer, BANZ loop,*AR6 plete: nop Then piling, assembling and linking to create the COFF files for TMS320VC5402, and loading the files to DSP target system to run by simulator, using debugger to debug. Measuring wave has be gain as follows Comparing Fig 6(b) with Fig 6(c), we get that it is automatic adjustment through about 5 seconds after system starts, their error reduces gradually, the system converges, convergence rate is dependent on the appropriate choice of .., and we can obtain from Fig 6(d) that the longer the response time is, the smaller the error is. Accordingly the filter effect is better. 6 Conclusion In this paper, adaptive FIR filter was designed by the bination of MATLAB simulation and the hardware system of TMS320VC5402, and it makes fully use of the special structure and instruction. The method has been proved to be effective and feasible by the simulation results and measure results. References [1] Simon Haykin. Adaptive Filter Theory [M]. BeiJing: Publishing House of Electronics Industry, 2020. [2] Guo Senmao, Yan Yunsheng. Digital Signal Processors [M]. Publishing House of tsinghua university. 2020. [3] Ma Weifu, Lei Yong, Teng Huan. Achievement of Adaptive Filtering with Lms algorithm and DSP [J].Journal of Sichuan University (Natural Science Edition).,Oct, 2020. [4] Sun, Xu. Kuo, Sen M. Active narrowband noise control systems using cascading adaptive filters [J]. IEEE Transactions on Audio Speech and Language Processing。 Vol. 19, Conference Proceedings, 2020. Author Biography 本科畢業(yè)設(shè)計(jì)（論文） 簡(jiǎn)明指導(dǎo)手冊(cè) 1 畢業(yè)設(shè)計(jì) (論文 )總論 概 述 高等院校的畢業(yè)設(shè)計(jì) (論文 )教學(xué)過程是實(shí)現(xiàn)本科培養(yǎng)目標(biāo)及規(guī)格的重要培養(yǎng)階段。 畢業(yè)設(shè)計(jì) (論文 )的基本概念 （ 1） 畢業(yè)設(shè)計(jì)的內(nèi)涵 畢業(yè)設(shè)計(jì)是高等學(xué)校應(yīng)屆畢業(yè)生，畢業(yè)前接受課題任務(wù)，所進(jìn)行的設(shè)計(jì)過程，并取得其設(shè)計(jì)成果。畢業(yè)論文表明作者在科學(xué)研究工作中取得的新成果或提出的新見解，并表明作者具有的科研能力與學(xué)識(shí)水平。 畢業(yè)設(shè)計(jì) (論文 )的特點(diǎn)與功能 （ 1）畢業(yè)設(shè)計(jì)的特點(diǎn)與功能 ①畢業(yè)設(shè)計(jì)的特點(diǎn) 高等院校學(xué)生畢業(yè)設(shè)計(jì)具有設(shè)計(jì)內(nèi)容的科學(xué)性、設(shè)計(jì)思想的新穎性、設(shè)計(jì)表述的規(guī)范性、設(shè)計(jì)條件的約束性、設(shè)計(jì)過程的綜合性、設(shè)計(jì)結(jié)果的實(shí) 用性等工程設(shè)計(jì)的特點(diǎn)外，還具有畢業(yè)設(shè)計(jì)任務(wù)的確定首先考慮教學(xué)基本要求、畢業(yè)設(shè)計(jì)時(shí)間的限定性及學(xué)業(yè)的規(guī)定性、畢業(yè)設(shè)計(jì)是在指導(dǎo)教師指導(dǎo)下獨(dú)立完成的等特點(diǎn)。教學(xué)與教育功能 畢業(yè)設(shè)計(jì)教學(xué)過程是高等院校培養(yǎng)計(jì)劃的重要組成部分；是進(jìn)行設(shè)計(jì)科學(xué)教育，強(qiáng)化工程意識(shí)，接受工程基本訓(xùn)練，提高工程實(shí)踐能力的重要培養(yǎng)階段；是培養(yǎng)優(yōu)良的思維品質(zhì)，進(jìn)行綜合素質(zhì)教育的重要途徑。在畢業(yè)設(shè)計(jì)階段，通過畢業(yè)設(shè)計(jì)教學(xué)與教育功能的實(shí)現(xiàn)，有益于學(xué)生科學(xué)的智能結(jié)構(gòu)的形成及綜合素質(zhì)的全面培養(yǎng)。社會(huì)功能 畢業(yè)設(shè)計(jì)課題來源于實(shí)際，畢業(yè)設(shè)計(jì)成果直接或間接為經(jīng)濟(jì)建設(shè)服務(wù)，為生產(chǎn)、科研服務(wù)，為社會(huì)服務(wù)，以實(shí)現(xiàn)畢業(yè)設(shè)計(jì)的社會(huì)功能。畢業(yè)論文課題的確定，首先要符合教學(xué)基本要求，同時(shí)也要兼顧科學(xué)研究實(shí)際需要，緊密聯(lián)系實(shí)際。畢業(yè)論文具有時(shí)間的限定性及學(xué)業(yè)的規(guī)定性。畢業(yè)論文是在指導(dǎo)教師指導(dǎo)下獨(dú)立完成的。教學(xué)與教育功能 畢業(yè)論文教學(xué)過程是高等學(xué)校培養(yǎng)計(jì)劃的重要組成部分，是學(xué)生畢業(yè)前提交的一份具有一定理論與實(shí)際價(jià)值的學(xué)術(shù)論文。通過畢業(yè)論文的教學(xué)過程，培養(yǎng)學(xué)生探求未知、探索真理的科學(xué)精神，以及優(yōu)良的科學(xué)品質(zhì)與科學(xué)素養(yǎng)；培養(yǎng)學(xué)生從事科學(xué)研究的基本能力。 然后，通過開發(fā)研究的成果應(yīng)用于生產(chǎn)實(shí)際，為社會(huì)服務(wù)。 3 大學(xué) 畢業(yè)設(shè)計(jì)（論文）簡(jiǎn)明指導(dǎo)手冊(cè) 畢業(yè)設(shè)計(jì) (論文 )教學(xué)各階段流程 表 1 畢業(yè)設(shè)計(jì) (論文 )教學(xué)各階段流程 指導(dǎo)教師上報(bào)課 1教研室 (課程組 )召開會(huì)議進(jìn)行課題審查、論證（要求紀(jì)錄 院系（學(xué)術(shù)委員會(huì)）或邀請(qǐng)校外專家對(duì)教研室上報(bào)課題進(jìn)行評(píng) 對(duì)學(xué)生公布課題，并確保一名學(xué)生做一個(gè)課題（或子課題 院系匯總通過評(píng)審的課題，并作為教學(xué)執(zhí)行計(jì)劃報(bào)教務(wù) 指導(dǎo)教師指導(dǎo)學(xué)生查閱相關(guān)文獻(xiàn)（包括一定