无孔嵌套阵列与三个子ULA来指导到达估计方向
Yule Zhang1, Guoping Hu2, Hao Zhou2
1Graduate College, Air Force Engineering University, Xi'an 710051, China.
Sensors (Basel, Switzerland)
|June 10, 2023
概括
这项研究引入了一种新的无孔嵌套阵列 (NA-TS),用于改进到达方向 (DOA) 估计. 拟议的数组比现有方法提供了更多的自由度 (DOF),提高了稀疏数组的性能.
科学领域:
- 信号处理 信号处理
- 阵列信号处理 阵列信号处理
- 电磁学 电磁学 电磁学 电磁学
背景情况:
- 稀疏阵列能够识别超过传感器数量的源.
- 无孔差异共同阵列 (DCAs) 提供了很大的自由度 (DOF).
- 现有的嵌套数组在DOF中存在局限性.
研究的目的:
- 提出一个新的无孔嵌套数组,其中有三个亚统一的线条数组 (NA-TS).
- 分析拟议的NA-TS的配置和DOF.
- 展示到达方向 (DOA) 的优越估计性能.
主要方法:
- 开发了一种新的无孔嵌套阵列配置 (NA-TS).
- 为最佳配置和DOFs.衍生闭式表达式.
- 使用1D和2D表示来进行详细分析.
- 将NA-TS与现有的无孔嵌套阵列进行比较.
主要成果:
- 详细介绍了NA-TS配置,以嵌套数组 (NA) 和改进的嵌套数组 (INA) 为特殊情况.
- NA-TS 的 DOF 是传感器计数和第三个亚统线阵列 (sub-ULA) 的函数.
- 与之前提出的无孔嵌套阵列相比,NA-TS提供了更多的DOF.
- 数字示例证实了NA-TS的优越DOA估计性能.
结论:
- 拟议的NA-TS是稀疏数组的有效配置.
- NA-TS提供了增强的DOF,对于先进的DOA估计至关重要.
- 新型阵列设计在识别多个来源方面带来了卓越的性能.
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