基于遺傳算法的遞歸式MTI濾波器的設(shè)計(jì)
DESIGN OF RECURSIVE MTI FILTER BASED ON THE GENETIC ALGORITHM
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摘要: 遞歸式MTI濾波器從理論上講幾乎可以合成任意形狀的頻率響應(yīng)函數(shù)，因而具有很廣的應(yīng)用范圍。為了能夠靈活設(shè)計(jì)出滿足系統(tǒng)要求的遞歸式MTI濾波器，提出了一種設(shè)計(jì)方法。該方法以遺傳算法(GA)的基本思想為基礎(chǔ)，利用濾波器的改善因子、通帶寬度和通帶波紋來構(gòu)成適應(yīng)函數(shù)，并用GA來加快參量搜索速度和獲取全局近似最優(yōu)解。實(shí)驗(yàn)仿真設(shè)計(jì)了兩種典型的遞歸式MTI濾波器，結(jié)果證明該方法是一種有效的設(shè)計(jì)方法，它可以靈活而快速地設(shè)計(jì)出所需要的濾波器。
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關(guān)鍵詞:
- 遞歸式MTI濾波器;遺傳算法;改善因子;通帶寬度;通帶波紋
Abstract: In theory, it is possible to synthesize any frequency response curve with the recursive MTI(Moving Target Indication) filters. As a result, the applied field of this kind of filter is wide. A new design method is presented to design flexibly a recursive MTI filter that can meet the specifications of the system. The method is based on the Genetic Algorithm(GA) and constitutes the fitness function with improvement factor, passband width and ripple of a filter. It speeds the search process and achieves near-global optimum parameters by means of the GA. Two kinds of classical recursive MTI filters are designed in this paper. The results demonstrate the validity of this design method that can design flexibly and quickly a required filter. -
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