| 摘要: |
| 针对稀布天线阵列中带有阵元数目、阵列孔径、阵元间距上下限和峰值旁瓣电平抑制的多重约束问题，提出了一种基于改进和声搜索算法的综合方法。通过和声变量与阵元间距的矢量映射，原始的强约束优化问题可以转换为仅含双边约束的优化问题，从而在保持可行解空间不变的同时提高了问题的自由度。为了加速收敛过程，采用动态调整参数策略。仿真结果表明，与现有文献中的算例进行比较，所提出的方法能够得到更低的峰值旁瓣电平，且鲁棒性好，收敛速度快。 |
| 关键词: 稀布线阵 和声搜索算法 多重约束问题 旁瓣电平 矢量映射 |
| DOI： |
|
| 基金项目:国家自然科学基金资助项目(61671239)；中央高校基本科研业务费专项资金项目(NS2016043)；江苏省高校自然科学研究面上项目(15KJB510015) |
|
| Synthesis technique for aperiodic linear array based on improved harmony search algorithm |
| JIN Can,LI Hailin,SUN Jie,ZHOU Jianjiang |
| (The Ministry of Education Key Laboratory of Radar Imaging and Microwave Photonics，Nanjing University of Aeronautics and Astronautics,Nanjing 211106,China) |
| Abstract: |
| For the aperiodic linear arrays with multiple design constraints,including the number of elements,the array aperture,the minimum and the maximum distance between neighboring elements,and peak sidelobe level(PSLL) suppression,a pattern synthesis method is proposed based on Improved Harmony Search(IHS) algorithm.Through the vector mapping between element spacings and harmony vectors,the initial strong constrained optimization problem is transformed to an optimization problem with upper and lower bound constraints,while maintaining the feasible solution space unchangeable and having greater degree of freedom(DoF).In order to improve the convergence rate,a strategy for dynamically tuning parameters is adopted.Experimental results show that the proposed method can obtain a lower PSLL with robustness and higher efficiency compared with some existing methods found in literatures. |
| Key words: aperiodic linear arrays harmony search algorithm multiple-constrained optimization problem sidelobe level vector mapping |
《电讯技术》编辑部 