【正文】 事在人為，無論多復(fù)雜，無論有沒有思路，只要努力去思考，就肯定會(huì)有解決問題的辦法。這次實(shí)驗(yàn)將理論上學(xué)習(xí)的DSP知識(shí)真正應(yīng)用到了實(shí)踐中，雖然掌握了理論的相關(guān)知識(shí)，但在與實(shí)踐相聯(lián)系的過程中還是遇到了不少問題。當(dāng)然自己寫程序有點(diǎn)超乎我的能力之外，所以程序思路大體上都是參考的資料。開始做這次實(shí)驗(yàn)的時(shí)候一點(diǎn)頭緒都沒有，感覺無從下手。十、感想經(jīng)過整整十天的努力，本次小學(xué)期的任務(wù)終于完成了，這次實(shí)驗(yàn)我花費(fèi)了很多的時(shí)間和精力，經(jīng)過無數(shù)次的調(diào)試和修改，終于得到了最后的成果。對(duì)于相位響應(yīng)，當(dāng)階數(shù)上升時(shí)，對(duì)于FIR濾波器，一直是比較理想的線性響應(yīng)。由頻域波形可看出，高頻的噪音在先經(jīng)過帶通濾波器后都先被濾掉了，輸出信號(hào)只有語音頻率帶有幅值； 不同低通濾波器的對(duì)比(1)FIR16階hann窗MATLAB設(shè)計(jì)結(jié)果：h[k]參數(shù)0, 41, 298, 761, 967, 0, 3696, 19616, 19616, 3696, 0, 967, 761, 98, 41, 0CCS中幅頻特性：(2) FIR32階hann窗MATLAB設(shè)計(jì)結(jié)果：h[k]參數(shù)0, 7, 18, 0, 83, 223, 341, 306, 0, 590, 1299, 1777, 1540, 0, 3993, 19789, 19789, 3993, 0, 1540, 1777, 1299, 590, 0, 306, 341, 223, 83, 0, 18, 7, 0CCS中幅頻特性(3)FIR64階hann窗MATLAB設(shè)計(jì)結(jié)果：h[k]參數(shù)0, 1, 3, 5, 0, 14, 34, 47, 39, 0, 65 ,132, 161, 121, 0, 172, 328, 385, 278, 0，376, 709, 827, 599, 0, 848, 1671, 2095, 1699, 0, 4064, 19828, 19828, 4064, 0, 1699, 2095, 1671, 848, 0, 599, 827, 709, 376, 0, 278, 385, 328, 172, 0, 121, 161, 132, 65, 0, 39, 47, 34, 14, 0, 5, 3, 1, 0CCS中幅頻特性：(4)FIR 16階blackman窗MATLAB設(shè)計(jì)結(jié)果：h[k]參數(shù)0, 16, 139, 443, 690, 0, 3471, 19484, 19484, 3471, 0, 690, 443, 139, 16, 0CCS中幅頻特性（5）FIR32階blackman窗MATLAB設(shè)計(jì)結(jié)果：h[k]參數(shù)0, 3, 7, 0, 38, 114, 194, 193, 0, 448, 1066, 1556, 1421, 0, 3935, 19756, 19756, 3935, 0, 1421, 1556, 1066, 448, 0, 193, 194, 114, 38, 0，7, 3, 0CCS中幅頻特性（6）FIR16階hamming窗MATLAB設(shè)計(jì)結(jié)果：h[k]參數(shù)0, 113, 419, 878, 1031, 0, 3731, 19656, 19656, 3731, 0, 1031, 878, 419, 113, 0CCS中幅頻特性（7）FIR32階hamming窗MATLAB設(shè)計(jì)結(jié)果：h[k]參數(shù)51, 61, 53, 0, 119, 280, 397, 339, 0, 617, 1338, 1809, 1555, 0, 3996, 19766, 19766, 3996, 0, 1555, 1809, 1338, 617, 0, 339, 397, 280, 119, 0, 53, 61, 51CCS中幅頻特性（8）FIR 64階hamming窗帶通濾波器MATLAB設(shè)計(jì)結(jié)果：h[k]參數(shù)22, 46, 1, 35, 26, 85, 31, 38, 154, 69, 135, 5, 326, 196, 261, 58, 307, 798, 127, 0, 170, 1421, 734, 189, 1161, 1218, 2895, 69, 2772, 2419, 10979, 9792, 9792, 10979, 2419, 2772, 69, 2895, 1218, 1161, 189, 734, 1421, 170, 0, 127, 798, 307, 58, 261, 196, 326, 5, 135, 69, 154, 38, 31, 85, 26, 35, 1, 46, 22CCS中幅頻特性（9）濾波器的相頻特性（FIR 16位blackman窗）MATLAB設(shè)計(jì)結(jié)果：設(shè)計(jì)相頻特性CCS中相頻特性結(jié)論：通過對(duì)各種窗函數(shù)的研究可以發(fā)現(xiàn)：在窗函數(shù)類型相同時(shí)，階數(shù)越高，通帶與阻帶越平坦，通帶與阻帶的過渡帶越窄。然后進(jìn)行編譯和鏈接，如下圖所示：編譯無錯(cuò)誤后，將生成 ，這就是將要下載到DSK板上的文件。} }（）MEMORY{ PAGE 0: VEC1: origin = 0080h, length = 0078h /* Internal Program RAM */ PRAM: origin = 2000h, length = 2000h /* Internal Program RAM */ VEC2: origin = 0xff80, length = 0x78 PAGE 1: SCRATCH: origin = 0060h, length = 0020h /* Scratch Pad Data RAM */ DMARAM: origin = 0100h, length = 0400h /* DMA buffer */ STACK: origin = 0600h, length = 0400h /* Stack Memory Space */ EXRAM: origin = 1100h, length = 0e00h /* External Data RAM */}/*****************************************************************************//* DSP Memory Allocation *//*****************************************************************************/SECTIONS{ .cinit PRAM PAGE 0 .text PRAM PAGE 0 .vectors VEC2 PAGE 0 .vecs VEC1 PAGE 0 .stack STACK PAGE 1 .trap SCRATCH PAGE 1 .bss EXRAM PAGE 1 .cio EXRAM PAGE 1 .fifo EXRAM PAGE 1 .sintab EXRAM PAGE 1 audio_buffer DMARAM PAGE 1 outt_buffer DMARAM PAGE 1 .const EXRAM PAGE 1 coefficients EXRAM ,align (512) delayb EXRAM ,align (512)}（）************************************************************************** (C) Copyright Texas Instruments, Inc. 2000 *************************************************************************** ** MODULE NAME: ** ** AUTHOR: C5000 Applications ** ** DESCRIPTION: TMS320VC5402 Interrupt Vector initialization table ** ** NOTE: If DSP/BIOS used you will have to initialize interrupt ** vector table using the BIOS configuration tool ** **