小孔天线阵列用于方向到达估计
Krutant J Mehta1, Inder J Gupta1
1ElectroScience Laboratory, The Ohio State University, Columbus, OH 43212, USA.
Sensors (Basel, Switzerland)
|June 27, 2025
概括
为了最佳的到达方向 (DOA) 估计,小型光圈天线阵列需要不均的间距和不相似的元素. 包括相互合,而不是减轻它,提高了DOA估计性能.
科学领域:
- 电磁学和信号处理
- 天线阵列设计设计
- 预估到达方向的方向
背景情况:
- 到达方向 (DOA) 估计性能与空间共变矩阵相关.
- 对DOA估计的Cramer-Rao Bound也与这个矩阵密切相关.
- 小孔天线阵列被定义为具有很少的元素,元素间距 <= 0.5 波长.
研究的目的:
- 建立小型光圈天线阵列的设计标准,以改进DOA估计.
- 调查元素间距和元素不相似性对DOA性能的影响.
- 确定互联合在小光圈阵列的DOA估计中的作用.
主要方法:
- 使用空间协差矩阵推导设计标准.
- 分析矩阵信息与DOA估计性能之间的关系.
- 通过理论分析和模拟来证明设计原则.
主要成果:
- 最佳的小型光圈天线阵列应该具有非均间隔的元素.
- 不同的天线元素对于提高DOA估计准确性至关重要.
- 相互合,当纳入估计过程时,可以提高DOA的性能.
结论:
- 不均的间距和不相似的元素是小光圈DOA阵列的关键设计标准.
- 应该利用互联合,而不是消除,以提高DOA估计性能.
- 这些发现为设计高性能小光圈天线阵列提供了新的框架.
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