在基于DTMB的被动双向式雷达中,用于距离-多普勒模两可的侧面波的联合抑制方法
Scientific reports
|January 3, 2025
概括
本研究分析了用于被动比斯塔特雷达的数字电视地面多媒体广播 (DTMB) 信号的模两可功能. 一种新方法有效地抑制了范围-多普勒模两可的边缘波,以改善目标检测.
科学领域:
- 雷达系统工程 雷达系统工程
- 信号处理 信号处理
- 电磁学 电磁学 电磁学 电磁学
背景情况:
- 无源双向式雷达 (PBR) 使用机会照明器,例如数字电视地面多媒体广播 (DTMB) 信号.
- 由于范围和多普勒模两可,DTMB信号的非最佳模两可函数对准确的目标检测提出了挑战.
- 了解DTMB信号框架的物理结构对于分析其模糊性函数特征至关重要.
研究的目的:
- 在PBR的背景下分析DTMB信号的模糊性函数.
- 识别和阐明导致框架内和框架间范围侧叶片和多普勒侧叶片的机制.
- 提出和验证一种新的方法来抑制范围-多普勒模糊性,以实现明确的目标检测.
主要方法:
- 基于DTMB信号框架的物理结构,对模两可的函数进行了详细分析.
- 确定负责范围和多普勒侧流的机制.
- 开发和模拟一种联合方法来抑制范围-多普勒模糊性.
主要成果:
- 该分析准确地解释了基于DTMB的PBR中的各种范围和多普勒侧面波的起源.
- 提出的联合抑制方法有效地消除了模两可的峰值.
- 该方法最大限度地减少了主叶损失,保持了目标信号的完整性.
- 模拟和实验数据证实了拟议技术的有效性.
结论:
- DTMB信号的模糊性函数特征由其结构定义得很好.
- 这种新的联合方法提供了一个强大的解决方案,以减轻基于DTMB的PBR中的范围-多普勒模两可.
- 这种方法增强了被动雷达系统的明确目标检测能力.
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