分类号：TP311.1 U D C：
密 级：公 开 编 号：
学位论文
FFT滤波器和FIR滤波器性能比较分析
自由草论文作者姓名： | |
申请学位专业： | 通信工程 |
申请学位类别： | 工学学士 |
指导教师姓名（职称）： | 灌浆剂 |
can总线busoff论文提交日期： | 2015年5月25日 |
| |
FFT滤波器和FIR滤波器性能比较分析
摘 要
二十一世纪标志着数字化时代的来临，随着信息科技的快速发展，数字信号处理技术（DSP）已经发展成为信息产业之中的重要技术。它在通讯、电力系统、仪器自动化、遥感技术等技术领域得到了普遍的应用。与模拟滤波器相比，数字滤波器拥有稳定性高，精度高。设计方式灵活等重要的优点，没有模拟滤波器所存在的电压漂移和噪声等问题。并且拥有接近于理想的频率响应特性。这些优势注定了数字滤波器会得到广泛的应用。这其中，有限冲击响应滤波器（FIR滤波器）能够在保证幅度特性满足技术要求的同时，保证严格的线性相位特性。在数据传输，语音技术等方面应用广泛。同时，DSP的发展和FPGA技术的出现为数字滤波器的硬件实现提供了多样化的选择。 本课题主要应用C++语言设计FIR滤波器以及FFT滤波器，并对所设计的滤波器进行仿真。应用Microsoft Visual Studio 2010编译调试程序。主要运用窗函数设计法设计滤波器。 学术中比较常用的窗函数有以下几种：矩形窗函数，三角形窗函数，汉宁窗函数，海明窗函数，布莱克曼窗函数。通过这几种窗函数来分析两种滤波器在时间开销、幅度误差、相位误差等方面的差异。
关键字：数字信号技术 滤波器 FIR FFT 模型仿真 窗函数
Comparative analysis of FFT filter and FIR filter performance
土工格室护坡Abstract
The 21st century is the era of digital, with the rapid development of information technology, digital signal processing (DSP) technology has become an important technology in information industry. It has been widely used in the field of high-tech communications, power systems, instrument automation, remote sensing 365tetc.. Compared with analog filter, digital filter has high stability, high precision. The design is flexible and other important advantages, no problem existing simulation filter voltage drift and noise etc.. And have数字电视伴侣 close to the ideal frequency response. This kind of advantage to digital filter will be widely used. Among these, the finite impulse response (FIR) filter can in the guarantee range characteristics to meet technical requirements at the same time, to ensure the strict linear phase characteristics. In data transmission, voice technology has been applied widely. At the sa
me time, provides a diverse selection of DSP development and FPGA technology for the realization of digital filterhardware.
The main comppiling language of designing the FIR filter and FFT filter in this paper is C++ language.Debugging programs through The application of Microsoft Visual Studio 2010 . Academic commonly used window function is the following: Rectangular window function, Bartlett window function, Hanning window function, Hamming window function, Blackman window function.Through the analysis of several window functions to find differences between the two kinds of filters, and the difference of amplitude error and phase error.
Keywords: Digital signal technology FIR filter simulation window function
