Pattern synthesis optimization of 3-D ODAR based on improved GA using LSFE method  

作　　者：龙伟军 贲德 BAKHSHI ASIM D 张弓 

机构地区：[1]College of Information Science and Technology,Nanjing University of Aeronautics & Astronautics [2]Computer Engineering,University of Engineering and Technology

出　　处：《Journal of Harbin Institute of Technology(New Series)》2011年第1期96-100,共5页哈尔滨工业大学学报（英文版）

基　　金：Sponsored by the National Natural Science Foundation of China(Grant No.61071164)

摘　　要：Pattern synthesis in 3-D opportunistic digital array radar(ODAR) becomes complex when a multitude of antennas are considered to be randomly distributed in a three dimensional space.In order to obtain an optimal pattern,several freedoms must be constrained.A new pattern synthesis approach based on the improved genetic algorithm(GA) using the least square fitness estimation(LSFE) method is proposed.Parameters optimized by this method include antenna locations,stimulus states and phase weights.The new algorithm demonstrates that the fitness variation tendency of GA can be effectively predicted after several "eras" by the LSFE method.It is shown that by comparing the variation of LSFE curve slope,the GA operator can be adaptively modified to avoid premature convergence of the algorithm.The validity of the algorithm is verified using computer implementation.Pattern synthesis in 3-D opportunistic digital array radar （ODAR） becomes complex when a multi- tude of antennas are considered to be randomly distributed in a three dimensional space. In order to obtain an optimal pattern, several freedoms must be constrained. A new pattern synthesis approach based on the improved genetic algorithm （GA） using the least square fitness estimation （LSFE） method is proposed. Parameters optimized by this method include antenna locations, stimulus states and phase weights. The new algorithm demonstrates that the fitness variation tendency of GA can be effectively predicted after several ＂ eras＂ by the LSFE method. It is shown that by comparing the variation of LSFE curve slope, the GA operator can be adaptively modified to avoid premature convergence of the algorithm. The validity of the algorithm is verified using computer implementation.

关 键 词：antenna radiation patterns genetic algorithm(GA) opportunistic digital array radar(ODAR) pattern synthesis the least square fitness estimation(LSFE) 

分 类 号：TN821[电子电信—信息与通信工程]