小尺度阵列稳健的波束形成方法仿真研究  

Simulation Research on the Directivity Pattern of Miniaturized Linear Array

作　　者：张天伟[1] 陈航[1] 马存宝[1] 宋东[1] 

机构地区：[1]西北工业大学,陕西西安710072

出　　处：《计算机仿真》2013年第10期233-236,266,共5页Computer Simulation

摘　　要：研究一种阵元间距小于四分之一波长的小尺度五元线列阵波束形成的优化问题。在阵列孔径很小的条件下,为得到好的指向特性与高的增益,提出通过四种算法,改进白噪声增益约束法,在保持空间白噪声阵增益大于某给定值的条件下,使基阵对相关噪声场的阵增益最大化,同时在波束后方布置虚拟干扰源,以获得无后射的稳健优化阵处理权向量,并与其它三种方法进行了比较。通过计算机仿真对不同条件下阵列的波束图、阵增益等特性进行研究。结果表明,对于小型化阵列,经改进的白噪声增益约束法既可获得良好的波束特性、高的阵增益,又具有好的稳健性,为波束形成优化设计提供了依据。This paper studied the beam forming algorithm of the miniaturized linear array which element spacing is less than a quarter wavelength. The purpose is to solve the optimization problem of the small scale linear array beam forming. Under the conditions of a small aperture array, it is difficuhy to obtain good directivity characteristics and high gain. This paper studied the miniaturized linear array through four beam forming algorithms, and improved white noise gain constraint algorithm. While maintaining spatial white noise gain is greater than a given value, the array gain was maximized under correlated noise field, at the same time, virtual interference source in the beam rear was arranged to obtain robust array processing weight vector, and compared with the other three methods. The beam pat- tern and array gain were studied under different conditions through computer simulation using different beam forming methods. The resuhs show that, the improved white noise gain constraint method can obtain good beam characteris- tics, high array gain, and also has good robustness. Is suitable for the miniaturized linear array.

关 键 词：线列阵 方向性图 波束宽度 超指向性 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]