稳健的机载预警雷达多通道海杂波抑制方法研究

黄鹏辉; 邹子豪; 刘兴钊; 廖桂生; 王志城; 陈筠力; 刘艳阳

doi:10.11999/JEIT200411

稳健的机载预警雷达多通道海杂波抑制方法研究

doi: 10.11999/JEIT200411

1.
上海交通大学电子信息与电气工程学院上海 200240
2.
西安电子科技大学雷达信号处理国家重点实验室西安 710071
3.
上海无线电设备研究所上海 200090
4.
上海航天技术研究院上海 201109

基金项目: 国家重点研发项目基金(2017YFB0502700)，国家自然科学青年基金(61801289)，上海航天科技创新基金(SAST2019-071)

详细信息

作者简介:
黄鹏辉：男，1990年生，讲师，研究方向为天基预警、机载/星载多通道SAR-GMTI、新体制星载SAR成像、弱小目标探测跟踪

邹子豪：男，1995年生，硕士生，研究方向为空-时自适应处理、多通道雷达海杂波信号处理

刘兴钊：男，1962年生，教授，研究方向为雷达信号处理

廖桂生：男，1963年生，教授，研究方向为雷达信号处理

王志城：男，1982年生，副研究员，研究方向为雷达信号处理

陈筠力：男，1971年生，研究员，研究方向为雷达信号处理

刘艳阳：男，1987年生，副研究员，研究方向为雷达信号处理

通讯作者:
邹子豪　zouzihao@sjtu.edu.cn

中图分类号: TN957.51; TN959.72
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- 被引次数: 0
出版历程
- 收稿日期: 2020-05-26
- 修回日期: 2020-12-10
- 网络出版日期: 2021-01-05
- 刊出日期: 2021-09-16

Robust Sea Clutter Suppression Method for Multichannel Airborne Radar

1.
School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
2.
National Laboratory of Radar Signal Processing, Xidian University, Xi’an 710071, China
3.
Shanghai Radio Equipment Research Institute, Shanghai 200090, China
4.
Shanghai Academy of Space Technology, Shanghai 201109, China

Funds: The National Key R&D Program of China (2017YFB0502700), The National Natural Science Younth Foundation of China (61801289), The Shanghai Space Science and Technology Innovation Fund (SAST2019-071)

摘要

摘要: 在机载预警雷达对海洋背景运动目标的探测过程中，雷达平台的高速运动状态使得海杂波多普勒谱发生严重展宽现象，影响目标的检测性能。针对此问题，空-时自适应处理是一种有效的杂波抑制技术，该技术利用杂波的空-时2维耦合特性进行杂波抑制。但相对于陆地杂波而言，海杂波的内部复杂运动特性使得杂波空-时谱发生展宽现象，导致杂波多普勒频率与空间锥角不再保持一一对应关系，从而影响杂波抑制效果。针对海杂波的运动特性，该文提出一种稳健的基于子空间投影的杂波抑制处理算法，所提算法通过滤波凹口自适应展宽技术和先滑窗滤波后自适应处理技术来提高杂波抑制的稳健性。最后通过仿真的海杂波数据和实测海杂波数据验证了所提算法的有效性。
- 机载预警雷达 /
- 杂波抑制 /
- 空-时自适应处理 /
- 子空间投影法 /
- 海杂波
Abstract: During the marine moving target detection for airborne early warning radar, the high-speed movement of the radar platform causes the serious broadening of the sea clutter Doppler spectrum, which affects the target detection performance. To solve this problem, a clutter suppression method called Space-Time Adaptive Processing (STAP) is effective, which exploits the space-time coupling characteristics of clutter. However, compared with the land clutter, the motion characteristics of sea clutter lead to the broadening of the clutter space-time spectrum, resulting in the clutter Doppler frequency and the spatial cone angle no longer maintaining a one-to-one correspondence; thus the clutter suppression performance significantly degrades. According to the motion characteristics of sea clutter, a robust subspace projection method is proposed in this paper. This method improves the robustness of clutter suppression by using the adaptive notch broadening technique and the filter then adapt technique. Finally, the effectiveness of this method is verified through the simulation results and the real-measured sea clutter data.
- Airborne early warning radar /
- Clutter suppression /
- Space-Time Adaptive Processing (STAP) /
- Subspace projection method /
- Sea clutter

HTML全文

图 1 机载多通道预警雷达平台与海面运动散射点的3维空间关系图

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图 2 稳健的子空间投影杂波抑制算法流程图

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图 3 仿真杂波空-时2维功率谱

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图 4 仿真海杂波距离-多普勒谱

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图 5 杂波抑制后输出信杂噪比损失曲线图

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图 6 杂波抑制前后距离-多普勒谱和1维多普勒谱

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表 1 系统仿真参数

参数	值
平台高度	4000 m
平台运动速度	100 m/s
雷达频率	9.6 GHz
信号带宽	30 MHz
采样频率	36 MHz
接收机噪声带宽	36 MHz
脉冲重复频率	3000 Hz
脉冲数	90
波束中心下视角	60°
波束中心方位角	90°
方位通道数	8
天线方位维长度	1.000 m
天线俯仰维长度	0.125 m
发射增益	42.1 dB
接收增益	42.1 dB
发射天线方位和距离向加权	–13 dB/–13 dB(等幅加权)
接收天线方位和距离向加权	–40 dB/–20 dB(切比雪夫加权)
系统噪声	2 dB
系统损耗	11 dB

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表 2 实测数据系统参数

参数	值
平台高度	3100 m
平台运动速度	80 m/s
雷达频率	9.6 GHz
脉冲重复频率	4000 Hz

下载: 导出CSV

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