单模式多输入多输出波形和不匹配过器设计,用于和前向干扰抑制.
Xuan Fang1, Dehua Zhao1, Liang Zhang2
1National Key Laboratory of Radar Detection and Sensing, Nanjing Research Institute of Electronics Technology, Nanjing 210039, China.
Sensors (Basel, Switzerland)
|September 28, 2024
概括
多输入多输出 (MIMO) 雷达角波形的振幅调制可以对抗前向干扰. 这项研究设计了单模 MIMO 波形和不匹配过器,将干扰相关性降低 -6.8 dB,并将干扰峰值抑制 19 dB.
科学领域:
- 电子战是一种电子战.
- 雷达信号处理 雷达信号处理
- 阵列信号处理 阵列信号处理
背景情况:
- 前置干扰器在电子战中构成重大威胁,因为它通过转发雷达信号来创建虚假目标.
- 干扰发射器和以最大化功率,仅保留到达方向 (DOA) 的角波形的相位信息.
- 多输入多输出 (MIMO) 雷达角波形的振幅调制是对抗前向干扰的可行策略.
研究的目的:
- 设计单模MIMO波形,最大限度地提高反传输干扰信号和合成雷达信号之间的差异.
- 开发相关的不匹配过器,以加强干扰抑制.
- 为了应对MIMO雷达系统中主要叶片干扰的挑战.
主要方法:
- 波形设计的表述作为一个不受约束的非线性优化问题,使用结合梯度方法解决.
- 利用快速里埃变换 (FFT) 来加快对象函数及其梯度的计算.
- 设计一个不匹配过器,使用凸起式优化来抑制干扰.
主要成果:
- 实现了对角波形和和前向干扰之间的相关性降低至 -6.8dB,用于八元MIMO雷达.
- 设计的不匹配过器成功地抑制了19dB的干扰峰值.
- 拟议的方法导致可接受的信号噪声比 (SNR) 损失小于2dB.
结论:
- 为MIMO雷达波形提出的振幅调制技术有效地最大化了与干扰信号的差异.
- 优化的单模波形和不匹配过器的组合提供了一个强大的防干扰解决方案.
- 这种方法提供了显著的干扰抑制能力,对雷达性能的影响最小.
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