[1]吕 婧,顾 红,苏卫民,等.基于keystone变换的噪声调频连续波雷达高速目标探测[J].南京理工大学学报(自然科学版),2014,38(06):707.
 Lv Jing,Gu Hong,Su Weimin,et al.High speed moving target detection using noise modulated continuous wave radar based on keystone transform[J].Journal of Nanjing University of Science and Technology,2014,38(06):707.
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基于keystone变换的噪声调频连续波雷达高速目标探测
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《南京理工大学学报》(自然科学版)[ISSN:1005-9830/CN:32-1397/N]

卷:
38卷
期数:
2014年06期
页码:
707
栏目:
出版日期:
2014-12-31

文章信息/Info

Title:
High speed moving target detection using noise modulated continuous wave radar based on keystone transform
作者:
吕 婧顾 红苏卫民薄 超
南京理工大学 电子工程与光电技术学院,江苏 南京 210094
Author(s):
Lv JingGu HongSu WeiminBo chao
School of Electronic Engineering and Optoelectronic Technology,NUST,Nanjing 210094,China
关键词:
keystone变换 噪声调频连续波雷达 高速目标 多普勒色散 等间隔重叠分段法 距离徙动
Keywords:
keystone transform noise frequency modulated continuous wave radar high speed moving targets Doppler dispersion effect overlapping equal interval piecewise method range migration
分类号:
TN957.51
摘要:
针对目标高速运动导致严重多普勒色散的问题,提出基于keystone变换的距离徙动校正方法。根据噪声调频连续波无周期性的特点,对回波信号采用等间隔重叠分段法进行频域相关处理。结合快速离散时间尺度变换算法,能够实现高效的长时间相参积累。无需先验知识,能处理多目标场景。通过仿真实验验证了该方法的有效性,并与传统时域相关法进行了比较和分析。当目标未出现距离徙动时,该文方法和时域相关法对目标输出信噪比的提升效果基本一致。当目标出现距离徙动后,时域相关法的输出信噪比迅速下降,恶化程度与徙动严重程度成正比,而该文方法经距离徙动校正后的输出信噪比则基本不受目标速度的影响,且仍随积累时间的增加而增大。
Abstract:
In order to solve the problem of Doppler dispersion effect caused by high speed motion of targets,a range migration compensation method is proposed based on keystone transform.According to the feature of aperiodicity of noise frequency modulated continuous wave,frequency domain correlation based on the equal interval piecewise method of overlapping is adopted to echo signals.Combined with fast discrete time scale transformation,effective long time coherent integration is achieved.Multiple targets can be detected simultaneously without prior knowledge.The method proposed here is compared with the traditional time domain correlation method and analyzed,and its effectiveness is verified by simulation experiments.Without range migration of targets,the promotion of output signal-to-noise ratio of the time domain correlation method and the method proposed here is equal basically.With range migration of targets,the output signal-to-noise ratio of the time domain correlation method decreases rapidly,and its deterioration is proportional to migration severity,but the output signal-to-noise ratio of the method proposed here after range migration compensation is not affected by the speed of targets and increases with the increase of accumulating time.

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备注/Memo

备注/Memo:
收稿日期:2014-07-14 修回日期:2014-09-14
基金项目:国家自然科学基金(61471198); 部预研基金(9140A07010713BQ02025); 教育部博士点基金(20113219110018); 中国航天科技集团公司航天科技创新基金(CASC04-02)
作者简介:吕婧(1984-),女,博士生,主要研究方向:噪声雷达信号处理,E-mail:sweet_xiaojing@163.com; 通讯作者:顾红(1967-),男,教授,博士生导师,主要研究方向:随机信号雷达,E-mail:guhong666@126.com。
引文格式:吕婧,顾红,苏卫民,等.基于keystone变换的噪声调频连续波雷达高速目标探测[J].南京理工大学学报,2014,38(6):707-714.
投稿网址:http://zrxuebao.njust.edu.cn
更新日期/Last Update: 2014-12-31