數(shù)字濾波器外文翻譯-其他專業(yè)(參考版)
2025-01-23 11:51本頁面
【正文】 s weakness is its performance as the same order number IIR filter, but due to the rapid development of digital puting hardware, this is not a problem. Plus introducing puter aided design, the design of FIR filters have also been great simplified. 。t work normally. If exceed 1/2 sampling frequency frequency weight not predominant, usually solution is placed in frequencyfield circuit before one lowpass filter (namely fight aliasing filter) will exceed filter the high frequency ponents. Otherwise we must realize with the simulated filter required functions. At the time, M is the order number IIR filter, said the number of feedback loops in the system. Due to the existence of IIR filter, feedback the impulse response to an infinite long, therefore the name. If A (z) = 1, it is the length of the impulse response system for N + 1, so called FIR filter. Linear moving constant digital filter, including an infinite long impulse response filter (IIR filter) and limited long impulse response filter (FIR filter) two kinds. These two kinds of filter system function can be unified with Z transformation expressed as: The advantages of IIR filter is that its design can directly using simulation filter design results, because analog filter itself is an infinite long impulse response. Usually IIR filter design process are as follows: first of all, according to the requirements of the design parameters of the corresponding filters simulated filter (such as bart hepworth filter, chebyshev filters, etc), and then by mapping (such as pulse response don39。 For timevarying syst
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