通过使用深度学习使用多个信号输入来提高到达方向估计的准确性
Yihan Lu1, Hengchao Guan1, Kun Yang1
1School of Information Engineering, Zhejiang Ocean University, Zhoushan 316022, China.
Sensors (Basel, Switzerland)
|May 25, 2024
概括
本研究引入了一种循环降噪方法和改进的CAPON算法,以提高到达方向 (DOA) 估计的准确性. 这些技术显著减少了角度估计误差,在各种信号噪声比条件下提高了可靠性.
科学领域:
- 信号处理 信号处理
- 阵列信号处理 阵列信号处理
- 机器学习在信号处理中的应用
背景情况:
- 到达方向 (DOA) 估计在各种应用中至关重要.
- 传统的DOA算法面临着噪音和有限的快照挑战.
- 提高DOA的准确性和可靠性仍然是一个活跃的研究领域.
研究的目的:
- 提出一种创新的循环降噪方法.
- 使用卷积神经网络 (CNN) 开发一个改进的CAPON算法 (最小变量无扭曲响应 - MVDR).
- 为了提高DOA估计的准确性和可靠性.
主要方法:
- 循环降噪是通过处理接收信号共变矩阵的固有值来实现的.
- 一个改进的CAPON算法,采用CNN结构,以处理的协差矩阵作为输入.
- 使用CAPON光谱值作为CNN的训练标签来估计空间光谱.
主要成果:
- 循环降噪将信号噪声比率 (SNR) 提高至多5dB,提高了DOA的准确性.
- 改进的CAPON算法在各种SNR和快照数字中显示出优于传统方法的性能.
- 根平均平方误差 (RMSE) 从0.86°减少到0.8°,角度估计误差减少了高达0.3°.
- 循环降噪进一步减少了角度估计误差,从0.04°降至0.02°.
结论:
- 拟议的循环降噪和改进的CAPON算法显著提高了DOA估计的准确性和可靠性.
- 基于CNN的CAPON算法有效地实现了盲源估计,性能得到改善.
- 这些方法在具有挑战性的信号环境中为DOA估计提供了强大的解决方案.
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