Research On Optimization Of Antenna Arrays In Aperture Synthesis Radiometers Based On Fireworks Algorithm

Aperture Synthesis Radiometer(ASR),as an interference measurement technology,has been widely used in the field of remote sensing of the Earth and other fields.ASR uses the idea of aperture synthesis to solve the problems of the processing difficulty of large diameter real aperture radiometer and the need for mechanical scanning and other issues,and effectively improve the spatial resolution and other detection performance.In general,the baseline combination in the array arrangement affects the sampling distribution spatial frequency domain,which determines the effect of inversion imaging and the performance of the ASR system.Therefore,in this paper,the new fireworks algorithm is applied to the arrangement and optimization of the integrated aperture array,the single-objective and multi-objective optimization problems in array optimization are both studied in detail,and a new method is provided for the optimization of array layout.Firstly,this paper explores the long searching time problem about low-redundancy linear array design with large number of antennas,based on the rules of low-redundancy linear array design,the fireworks algorithm is applied to the search of low redundant array,and the applicabilities and advantages of the fireworks algorithm in the optimization of the low redundancy array are analyzed,then puts forward the new low redundancy array by using this method.Secondly,the sensitivity of one-dimensional linear array is studied,and the optimal arrangement of sensitivity is optimized by using fireworks algorithm,then compares the researched optimal results with the results of greedy algorithm and simulated annealing algorithm,and highlights the global search ability of fireworks algorithm.Finally,this paper uses the fireworks algorithm to optimize the array which may needs to optimize multiple indexes at the same time in the array design.For the linear array,the redundancy and the degradation factor are taken as the optimization indexes;for the rectangular array,the number of antenna elements and the degradation factor are used as the optimization indexes.Using fireworks algorithm to realize the multi-objective optimization of these indexes,then compares the generated Pareto front with theoretical Pareto,then evaluates the Pareto optimal solution set following the evaluation criterion of the multi-objective Pareto optimal solution set.