基于任意形状平面阵列的二维测向技术研究

Two-dimensional direction estimate technology based on arbitrary plane antenna array

实际测向环境对天线阵的布阵形状要求较严,形状选择的合理与否将直接影响测向精度、测向带宽及测向频谱的范围.针对阵列形状和二维测向的实际问题,建立了利用任意形状平面阵列对空间多目标源进行二维测向的数学模型,并利用该模型和MUSIC算法对空间多目标实现了超分辨二维测向,简要地概括了算法实现的具体步骤,从而对以往的测向技术有了一定程度上的改进.计算机仿真结果表明了理论分析的正确性及数学模型的有效性.

Actual detecting environment is strictly controlled by embattling shape, which directly influences the precision, bandwidth and range of spectrum. To address the issue of array shape and two-dimensional direction-of-arrival estimation, a mathematical model was established for arbitrary plane antenna arrays to measure two-dimensional DOA of multiple distributed sources in space. A high-resolution direction-finding capability was realized using the model and MUSIC algorithm. The validity of this model and accuracy ot theoretical analysis were confirmed by computer simulation.