摘要
最小冗余阵作为智能天线中的一种,能以较少的阵元数获得比均匀阵大得多的阵列孔径,从而提高分辨率、简化系统、降低成本。但阵列的非均匀性导致最小冗余阵的旁瓣电平过高,为此文中提出了一种基于子空间的迭代算法抑制其旁瓣。仿真结果表明:此方法收敛速度快,可控旁瓣个数多,并且利用低旁瓣的最小冗余阵,对角度靠近观察方向的干扰进行抑制时,抗干扰能力增强,信号噪声干扰比得到提高。
As one kind of smart antenna,the minimum redundancy arrays with fewer elements and of lower cost could attain much larger array aperture and higher resolution than uniform linear arrays.However,for the particularly high sidelobe level of the non-uniformity and minimum redundancy array.This paper proposes a subspace-based iterative algorithm to suppress its sidelobe level.Simulation results show that this algorithm could provide both faster convergence rate and more controllable sidelobes.And by using a minimum redundancy array after suppression,the interferences in close angular proximity to the watch direction is rejected,and thus the performance of interference rejection and the signal-to-noise-plus-interference ratio are improved.
出处
《通信技术》
2010年第3期24-26,29,共4页
Communications Technology
关键词
最小冗余阵
旁瓣抑制
信号噪声干扰比
minimum redundancy arrays
sidelobe suppression
signal-to-noise-plus-interference ratio
