基于遺傳算法的星載合成孔徑雷達(dá)天線方向圖與模糊綜合
Antenna Pattern Synthesis for Ambiguity Depressing in Spaceborne SAR Systems Based on Genetic Algorithms
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摘要: 該文針對改善星載合成孔徑雷達(dá)(星載SAR)的模糊特性，以星載SAR的模糊度為目標(biāo)函數(shù)，以天線方向圖的主瓣寬度和副瓣電平為約束條件，應(yīng)用遺傳算法對天線方向圖進(jìn)行綜合。仿真結(jié)果表明，這種方法很好地抑制了模糊度，同時控制了主瓣寬度和副瓣電平，對星載SAR系統(tǒng)設(shè)計具有實際意義。
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關(guān)鍵詞:
- 星載合成孔徑雷達(dá);天線方向圖綜合;模糊
Abstract: In this paper Genetic Algorithms(GA) are applied to antenna pattern synthesis according to ambiguity depressing in spaceborne SAR. The ambiguity of spaceborne SAR is regarded as the objective function, and the beamwidth and the side lobe level of the antenna pattern are regarded as the constraints. The simulation results show that the ambiguity is depressed while the beamwidth and the side lobe level are well controlled via this method, which is quite helpful to spaceborne SAR system designing. -
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