超高速平台载雷达杂波特性与抑制方法

doi:10.3969/j.issn.1001-506X.2020.02.07

系统工程与电子技术 ›› 2020, Vol. 42 ›› Issue (2): 301-308.doi: 10.3969/j.issn.1001-506X.2020.02.07

超高速平台载雷达杂波特性与抑制方法

田明明¹(), 廖桂生¹(), 李云鹏²(), 朱圣棋¹()

1. 西安电子科技大学雷达信号处理国家重点实验室, 陕西西安 710071
2. 西安电子科技大学智能感知与图像理解教育部重点实验室, 陕西西安 710071

收稿日期:2019-04-11 出版日期:2020-02-01 发布日期:2020-01-23
作者简介:田明明 (1994-),男,博士研究生,主要研究方向为空时自适应处理、运动目标检测与参数估计。E-mail: tianmingming0402@163.com|廖桂生 (1963-),男,教授,博士,主要研究方向为空时自适应处理、天基预警、阵列信号处理。E-mail: liaogs@xidian.edu.cn|李云鹏 (1993-),女,博士研究生,主要研究方向为遥感图像处理。E-mail: 15565275379@163.com|朱圣棋 (1984-),男,教授,博士,主要研究方向为新体制雷达信号处理、稀疏阵列信号处理、雷达运动目标参数估计及成像。E-mail: sqzhu@xidian.edu.cn
基金资助:
国家自然科学基金(61621005)

Clutter properties and suppression method of hypersonic platform radar

Mingming TIAN¹(), Guisheng LIAO¹(), Yunpeng LI²(), Shengqi ZHU¹()

1. National Lab of Radar Signal Processing, Xidian University, Xi'an 710071, China
2. Key Laboratory of Intelligent Perception and Image Understanding of Ministry of Education, Xidian University, Xi'an 710071, China

Received:2019-04-11 Online:2020-02-01 Published:2020-01-23
Supported by:
国家自然科学基金(61621005)

摘要/Abstract

摘要：

针对高超声速平台杂波距离走动与多普勒走动导致的传统空时自适应处理方法杂波抑制性能严重下降的问题,首先建立了高超声速平台杂波空时二维模型,并通过分析杂波空时特性,得出与慢速平台相比,杂波走动造成杂波非均匀性增加和多普勒展宽更严重,非均匀性增加和多普勒展宽程度与脉冲积累时间、杂波块位置均有关。最后,提出利用keystone变换校正杂波距离走动,并通过补偿矩阵补偿杂波多普勒增量的杂波抑制方法。仿真结果表明,所提方法能够使杂波抑制凹口变窄,明显提高主瓣区的动目标检测性能。

关键词: 空时自适应处理, 高超声速平台, 距离走动, 多普勒走动, 杂波抑制

Abstract:

Focusing on the poor clutter suppression performance of the conventional space-time adaptive processing (STAP) method caused by range migration and Doppler migration of clutter with hypersonic platform, this paper firstly constructs a bidimensional space-time model of clutter of hypersonic platform and analyzes the clutter properties, which show that the heterogeneous clutter distribution is severer and the Doppler spectrum of clutter is broadened further compared with that of the slow velocity platforms. Furthermore, the heterogeneous distribution and Doppler spread are related to the positions of scatters and the number of pulses. Finally, a clutter suppression method, which corrects the range migration of clutter by keystone transform and compensates the increment of clutter Doppler by compensation matrix, is proposed. Simulation results show that the proposed method can narrow the notch for clutter suppression and obviously improve the detection performance of moving targets in the main-lobe area.

Key words: space-time adaptive processing (STAP), hypersonic platform, range migration, Doppler migration, clutter suppression

中图分类号:

TN957.51

田明明, 廖桂生, 李云鹏, 朱圣棋. 超高速平台载雷达杂波特性与抑制方法[J]. 系统工程与电子技术, 2020, 42(2): 301-308.

Mingming TIAN, Guisheng LIAO, Yunpeng LI, Shengqi ZHU. Clutter properties and suppression method of hypersonic platform radar[J]. Systems Engineering and Electronics, 2020, 42(2): 301-308.

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超高速平台载雷达杂波特性与抑制方法

Clutter properties and suppression method of hypersonic platform radar

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