1、 1 摘要： 数字滤波，是数字信号处理的基本核心内容之一，占有极重要的地位。它通过对采样 数据信号进行数学运算处理来达到频域滤波目的，是图像处理、语音处理、模式识别、通 信、软件无线电、谱分析等应用中的一个基本处理算法。与模拟滤波器相比，数字滤波器 不用考虑器件的噪声、电压漂移、温度漂移等问题，可以容易的实现不同幅度和相位频率 等特性指标，能够处理低频信号，频率响应特性可做成非常接近于理想的特性，且精度可 以达到很高，容易集成等，这些优势决定了数字滤波器的应用很受欢迎。现在通过 DSP 编 程并结合TI 公司的数字信号处理器 TMs320VC5402 设计了一款稳定度高，低功耗的 IIR 数字
2、滤波器 系统，并完成了软硬调试工作。 关键字：数字滤波器，DSP，IIR ，低功耗 ，稳定 Abstract：Digital filtering of digital signal processing, is one of the basic core contents, occupies an important position. It through sampling data signals of mathematical operation treatment to achieve the frequency domain filtering purposes, image pro
3、cessing, audio processing, pattern recognition, communications, software radio, spectral analysis of applications such as a fundamental algorithms. Compared with simulation filter, digital filters need not consider device of noise, voltage drift, temperature drift, can easily achieve different ampli
4、tude and phase frequency characteristic indices, able to handle such low frequency signal, frequency response characteristics but make it very close to ideal characteristics, and the precision can reach high, easy integration etc, these advantages determines the application of digital filter is very popular. Now through DSP programming and combined with TI companys digital signal processor TMs320VC5402 design in a high degree of stability, low power consumption, IIR digital filter system and c
