一种收发互易的频带合成STAP-GMTI系统架构

doi:10.19665/j.issn1001-2400.2021.02.020

西安电子科技大学学报 ›› 2021, Vol. 48 ›› Issue (2): 156-164.doi: 10.19665/j.issn1001-2400.2021.02.020

一种收发互易的频带合成STAP-GMTI系统架构

常文胜^1,²(),陶海红¹(),代保全²(),刘彦斌³(),孙光才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.南京电子技术研究所,江苏南京 210039
3.西安电子科技大学物理与光电工程学院,陕西西安 710071

收稿日期:2020-10-14 修回日期:2021-01-18 出版日期:2021-04-20 发布日期:2021-04-28
作者简介:常文胜(1980—),男,研究员,E-mail: vicliflower@163.com|陶海红(1976—),女,教授,博士,E-mail: hhtao@xidian.edu.cn|代保全(1985—),男,工程师,博士,E-mail: dbqhao@163.com|刘彦斌(1996—),男,西安电子科技大学博士研究生,E-mail: ybliu_rsp@163.com|孙光才(1984—),男,教授,博士,E-mail: gcsun@xidian.edu.cn
基金资助:
国家杰出青年科学基金(61825105)

Frequency band synthesis STAP-GMTI system architecture with the reciprocal transceiver

CHANG Wensheng^1,²(),TAO Haihong¹(),DAI Baoquan²(),LIU Yanbin³(),SUN Guangcai¹()

1. National Laboratory of Radar Signal Processing,Xidian University,Xi’an 710071,China
2. Nanjing Research Institute of Electronics Technology,Nanjing 210039,China
3. School of Physics and Optoelectronic Engineering,Xidian University,Xi’an 710071,China

Received:2020-10-14 Revised:2021-01-18 Online:2021-04-20 Published:2021-04-28

摘要/Abstract

摘要：

信号带宽及采样频率的降低有利于基于微系统实现天线阵面的轻薄化,提升超高速平台大口径天线的适装性,然而地面运动目标的精确跟踪和识别对地面运动目标的高分辨距离像提出了需求。针对该矛盾,提出了一种基于收发互易的低瞬时带宽阵列,通过频带合成实现高分辨率地面运动目标显示的系统架构及处理方法。阵列的收发互易实现了等效相位中心的重合,频带合成过程中无须补偿目标偏离波束中心的相位差,可实现精确的频带合成;宽带信号合成后采用空时二维信号处理抑制杂波,实现对地面运动目标的检测。仿真验证了该系统架构及处理方法的正确性。

关键词: 地面运动目标, 频带合成, 收发互易, 系统架构, 自适应处理

Abstract:

The reduction of the signal bandwidth and sampling frequency is conducive to the realization of antenna array thinness based on the micro system so as to improve the adaptability of the large aperture antenna on the ultra-high speed platform.However,the high-resolution range profile of the ground moving target is required for accurate tracking and recognition of the ground moving target.In order to solve this problem,a system architecture and processing method based on the low instantaneous bandwidth digital array of transceiver reciprocity is proposed,which can realize high resolution ground moving target display(GMTI) by frequency band synthesis.Because the array transceiver reciprocity can realize the coincidence of the equivalent phase center,the phase difference of the target deviated from the beam center does not need to be compensated in the process of bandwidth synthesis,and the precise synthesis of large bandwidth signals can be realized.After the synthesis of the wideband signal,the clutter is suppressed by space-time adaptive processing(STAP) to realize the detection of ground moving targets.Simulation results verify the correctness of the system architecture and processing method.

Key words: moving ground targets, frequency band synthesis, system architecture, transceiver reciprocity, adaptive processing

中图分类号:

TN959.1

常文胜,陶海红,代保全,刘彦斌,孙光才. 一种收发互易的频带合成STAP-GMTI系统架构[J]. 西安电子科技大学学报, 2021, 48(2): 156-164.

CHANG Wensheng,TAO Haihong,DAI Baoquan,LIU Yanbin,SUN Guangcai. Frequency band synthesis STAP-GMTI system architecture with the reciprocal transceiver[J]. Journal of Xidian University, 2021, 48(2): 156-164.

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参数	数值	参数	数值
多通道天线阵列个数(2N)	4	波束指向角(ψ₀)	30°
每个多通道阵列子阵个数(M)	4	目标相对波束指向偏离角	0.02°
多通道阵列长度(L)/m	5.76	杂波模型	韦伯尔分布
阵列之间的间距(d)/m	0.04	目标模型	斯威林Ⅰ
载频(f₀)/GHz	16	目标1速度/(km·h^-1)	58
平台速度/(m·s^-1)	1 700	目标1距离/km	70
子带信号带宽/MHz	40	目标2速度/(km·h^-1)	15
子带信号脉宽/μs	10	目标2距离/km	70
阵列布置方式	正侧视

一种收发互易的频带合成STAP-GMTI系统架构

Frequency band synthesis STAP-GMTI system architecture with the reciprocal transceiver

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