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一种改进的非均匀线列阵宽带波束形成方法

An Improved Method of Wideband Beamforming with Non-uniform Linear Arrays

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【作者】 郭祺丽孙超

【Author】 GUO Qi-li,SUN Chao(Institute of Acoustical Engineering,Northwestern Polytechnical University,Xi’an Shanxi 710072,China)

【机构】 西北工业大学声学工程研究所

【摘要】 研究无线网络宽带信道优化问题,关于非均匀线列阵可以使用较少的阵元避免栅瓣的出现,针对非均匀线列阵的宽带波束形成问题。采用非均匀线列阵进行宽带波束形成方式,为了使非均匀线列阵在无失真接收信号的同时更好地抑制噪声,需要设计低旁瓣的宽带恒定束宽波束;利用渐近理论宽带非均匀线列阵的设计方法和优化方法相结合,提出了一种改进的宽带非均匀线列阵的设计方法,并给出了一个设计实例。仿真结果表明,方法可以在使用较少阵元数的情况下避免栅瓣的出现,同时得到低旁瓣的宽带恒定束宽波束,更好地满足波束性能要求,提高了宽带性能。

【Abstract】 The problem of wideband beamforming with non-uniform linear array(NULA) was studied in this paper,for non-uniform linear arrays can avoid the emergence of gridlobes using less sensors.In order to make non-uniform linear arrays have better ability of noise suppression while receiving signals without distortion,wideband constant beamwidth beampatterns with low sidelobes need to be designed.An improved design method for wideband non-uniform linear array is proposed,which combines Doles’ asymptotic theory design method of wideband non-uniform linear array together with the optimization method.A design example was given,and the simulation results show that the method can obtain wideband constant beamwidth beampatterns with low sidelobes,while avoid the emergence of gridlobes using less sensors.The simulation experiments show that,compared with Doles’ design method,the improved design method of wideband non-uniform linear arrays can reduce the sidelobe level of the beampatterns and so meet the requirements of beampattern performance better.

  • 【文献出处】 计算机仿真 ,Computer Simulation , 编辑部邮箱 ,2011年09期
  • 【分类号】TN911.7
  • 【被引频次】4
  • 【下载频次】166
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