基于matlab的fir数字滤波器的设计与仿真(英文翻译

基于matlab的fir数字滤波器的设计与仿真(英文翻译内容摘要：

(b) A3 (f) A4 (f) 1 1 Digital filter design Digital filter design of the basic requirements Digital filter design must go through three steps : (1) Identification of indicators : In the design of a filter, there must be some indicators. These indicators should be determined on the basis of the application. In many practical applications, digital filters are often used to achieve the frequency operation. Therefore, indicators in the form of ge neral jurisdiction given frequency range and phase response. Margins key indicators given in two ways. The first is absolute indicators. It provides a function to respond to the demands of the general application of FIR filter design. The second indicator is the relative indicators. Its value in the form of answers to decibels. In engineering practice, the most popular of such indicators. For phase response indicators forms, usually in the hope that the system with a linear phase frequency bands human. Using linear phase filter design with the following response to the indicators strengths： ① it only contains a few algorithms, no plural operations； ② there is delay distortion, only a fixed amount of delay。 ③ the filter length N (number of bands for N1), the volume calculation for N/2 magnitude. (2) Model approach : Once identified indicators can use a previous study of the basic principles and relationships, a filter model to be closer to the target system. (3) Achieved : the results of the above two filters, usually by differential equations, system function or pulse response to describe. According to this description of hardware or software used to achieve it. MATLAB introduced MATLAB is a matrix laboratory (Matrix Laboratory) is intended. In addition to an excellent value calculation capability, it also provides professional symbols terms, word processing, visualization modeling, simulation and realtime control functions. MATLAB as the world39。 s top mathematical software applications, with a strong engineering puting, algorithms research, engineering drawings, applications development, data analysis and dynamic simulation, and other functions, in aerospace, mechanical manufacturing and construction fields playing an increasingly important role. And the C language function rich, the use of flexibility, highefficiency goals procedures. High language both advantages as well as low level language features. Therefore, C language is the most widely used programming language. Although MATLAB is a plete, fully functional programming environment, but in some cases, data and procedures with the external environment of the world is very necessary and useful. Filter design usin。