FIR滤波器的设计毕业论文.doc

摘 要 21世纪是信息化的时代，随着科学技术的飞速发展，数字信号处理逐渐发展成为一门主流学科，它在电子信息、通信、自动控制等高科技领域得到了越来越广泛的应用。相对于模拟滤波器，数字滤波器没有漂移，频率响应特性可做成非常接近于理想的特性，可以很容易达到高精度，这些优势决定了数字滤波器的应用越来越广泛。同时DSP(数字信号处理器)的出现和迅速发展也促进了数字信号处理的发展，并为数字信号处理的实现提供了可能。 数字滤波技术是数字信号处理的核心技术。与IIR数字滤波器相比较，FIR数字滤波器具有严格的线性相位、总是稳定等特点而广泛应用于数字信号处理的各个领域。目前，它是一个重要的研究课题。本设计硬件部分选择TMS320LF2407A作为数字信号处理芯片进行硬件电路设计。主要包括时钟信号产生电路、芯片电源供电电路、模数转换和数模转换芯片与TMS320LF2407A连接电路、外部程序存贮器FLASH电路、扩展RAM存贮器等基本外围电路的设计。本设计软件部分采用MATLAB的进行FIR数字滤波器的设计与仿真分析，并将仿真的算法移植到DSP内部。通过比较输入输出波形来测试仿真算法。 关键词：DSP ，FIR ，MATLAB ，数字信号处理 ABSTRACT 21 century is the time of information. With the rapid development of science and technology, digital signal processing has developed as a main academic subject. It has been widely applied in the high-tech fields of electronic information, communication and automatic control. Compared to analogue filter, digital filter can process signal without excursion. Frequency response property can be made closely to ideal property. The precision that can be reached is very high. These advantages contribute to the application of digital filter more and more widely. At the same time, the appearance of digital signal processor (DSP) and its rapid development also contribute to the application of digital signal processing and make the accomplishment of digital signal processing probably. Digital filter technique is one of the core techniques in the signal processing field. Compared to the IIR digital filter, the FIR digital filter has been widely used in the signal processing field because of its strict linear phase and stability. For the time being, it becomes as a very significant research task. In the hardware designing, choosing the TMS320LF2407A as the digital signal processing chip to design the hardware circuit which includes the clock-generating circuit, the chip power supply circuit, the interface circuit of the A/D and D/A chips, the FLASH and RAM chip connecting interface and so on. In the software designing, choosing MATLAB to design FIR digita