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出 处:《电讯技术》2012年第12期1915-1919,共5页Telecommunication Engineering
摘 要:由于受实际环境的限制,天线阵的布设受到一定的约束,而实际测向环境限制了天线阵列的阵列结构,阵列结构是否合理将直接影响测向的精度。针对特定环境对阵列结构的特殊要求及二维测向的实际问题,建立了非规则几何结构阵列进行二维测向的数学模型,研究了基于MUSIC算法的非规则几何结构阵列的二维测向问题,对非规则结构阵列的阵列结构对测向模糊性的影响进行了分析,以矩形平面阵列和任意形平面阵列为例,对两种阵列的测向性能进行了仿真比较,结果证明,提出的数学模型对非规则结构平面阵列的研究具有有效性,可广泛应用于任意平面空间的二维测向。The array's geometry subjects to limitations because of the actual detecting environment's restriction, which directly influences the precision of direction-finding. To address the issue of army geometry, some particular application environment and the two-dimensional Direction-of-arrival(DOA), a mathematical model is established for the irregular geometry plane antenna array to measure the two-dimensional DOA of multiple distributed sources in space. The irregular geometry plane anay's two-dimensional DOA is studied which is based on the classical MUSIC. The relationship between geometry of the antenna array and DOA ambiguity is analysed in this paper. The array's DOA performance, which is based on planar array and arbitrary geometry array, is compared by simula- tion. The validity of this model and accuracy of theoretical analysis are confirmed by simulation results. It can find wide application in the field where irregular plane space's two-dimensional DOA is required.
关 键 词:波达方向 非规则阵列 阵列结构 模糊性 经典MUSIC算法
分 类 号:TN97[电子电信—信号与信息处理]
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