| 摘要: |
| 针对当前干涉仪测向技术中测向精度和解模糊概率易受基线选择影响，以及天线阵元尺寸和侦测距离受限的问题，提出了一种非对称干涉仪测向方法。该方法通过构造增益非对称的几何阵列，结合一种普遍适用于任意平面阵列干涉仪的二维测向方法，显著优化了测向性能。具体而言，就是利用高增益天线的信号相关性提取干涉仪阵列间的相位差信息，并通过构建相位差代价函数，采用最小方差迭代算法来准确计算出来波方位。实验结果表明，该方法实现的有效探测距离可达传统干涉仪的2倍以上，且对干涉仪阵列的构型无特殊要求。此外，该方法无需刻意解相位差模糊问题，其测向精度较传统干涉仪相差0.1°以内。 |
| 关键词: 平面阵列 干涉仪测向 二维测向 增益非对称 |
| DOI：10.20079/j.issn.1001-893x.250223003 |
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| 基金项目: |
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| A Direction Finding Method of Asymmetric Arbitrary Array Interferometers |
| ZHU Zihan |
| (Southwest China Institute of Electronic Technology，Chengdu 610036，China) |
| Abstract: |
| For the issues in current interferometer direction finding(DF) technology where DF accuracy and ambiguity resolution probability are susceptible to baseline selection,as well as limitations in antenna array element size and detection range,an asymmetric interferometer DF method is proposed.This method significantly optimizes DF performance by constructing a geometrically asymmetric gain array combined with a two-dimensional DF method,which is universally applicable to any planar array interferometer.Specifically,it leverages the signal correlation from high-gain antennas to extract phase difference information between interferometer arrays,constructs a phase difference cost function,and employs a least variance iterative algorithm for accurate calculation of the wave azimuth.Experimental results demonstrate that,compared with traditional interferometers,this method achieves over a doubling of detection range and has no special requirements for the configuration of the interferometer array.Furthermore,this method does not require deliberate resolution of phase difference ambiguity issues,and its DF accuracy is within 0.1° of the traditional interferometer DF error. |
| Key words: planar array interferometer direction finding two-dimensional direction finding asymmetric gain |
《电讯技术》编辑部 