新型噪声雷达的信号处理基于de-chirp和延迟匹配
Xinquan Cao1, Shiyuan Zhang1, Ke Tan1
1School of Electronic and Optical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China.
Sensors (Basel, Switzerland)
|November 27, 2024
概括
本研究介绍了一种使用噪声频率调制 (NFM) 和线性频率调制 (LFM) 改进抗干扰能力的新型复合雷达波形. 该方法优化了回声处理,保持了检测性能,同时降低了硬件成本.
科学领域:
- 电气工程 电气工程
- 信号处理 信号处理
- 雷达系统 雷达系统
背景情况:
- 传统的频率调制连续波 (FMCW) 雷达具有较差的反干扰能力.
- 在FMCW雷达中的高采样率增加了硬件成本,降低了处理效率.
- 先进的雷达系统需要提高信号质量和检测性能.
研究的目的:
- 开发一种复合雷达波形,具有改进的反干扰能力.
- 为增强雷达检测提出一个优化的回声信号处理方法.
- 为了降低系统硬件成本,提高雷达系统的数据处理效率.
主要方法:
- 构建了一个复合雷达波形,将噪声频率调制 (NFM) 和线性频率调制 (LFM) 信号结合起来.
- 使用局部生成的LFM信号处理的de-chirp技术将接收到的回声处理成一个窄带差频噪声信号.
- 使用本地生成的NFM信号在快速时间域中进行延迟匹配,以获取目标延迟信息.
主要成果:
- 复合波形增强了信号复杂性和防干扰能力.
- 拟议的处理方法保持了宽带回声信号检测性能,尽管降低了模拟到数字 (A / D) 采样率.
- 侧叶片水平和范围分辨率得到保留,通过缓慢时间域积累实现了准确的目标检测.
结论:
- 开发的复合雷达波形和回声处理方法有效地提高了雷达性能.
- 这种方法提供了一种可行的解决方案,用于提高现代雷达系统的抗干扰能力,并降低现代雷达系统的硬件成本.
- 模拟实验验证了拟议的目标检测技术的有效性.
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