[1]王志华,赵兆,蔡征宇.基于S-method 的伪码调相连续波雷达调频干扰抑制[J].南京理工大学学报(自然科学版),2011,(06):858-862.
 WANG Zhi-hua,ZHAO Zhao,CAI Zheng-yu.FM Interference Suppression Based on S-method for PRC-CW Radar[J].Journal of Nanjing University of Science and Technology,2011,(06):858-862.
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基于S-method 的伪码调相连续波雷达调频干扰抑制
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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:
期数:
2011年06期
页码:
858-862
栏目:
出版日期:
2011-12-31

文章信息/Info

Title:
FM Interference Suppression Based on S-method for PRC-CW Radar
作者:
王志华赵兆蔡征宇
南京理工大学电子工程与光电技术学院,江苏南京210094
Author(s):
WANG Zhi-huaZHAO ZhaoCAI Zheng-yu
School of Electronic Engineering and Optoelectronic Technology,NUST,Nanjing 210094,China
关键词:
干扰抑制 调频干扰 伪码调相连续波雷达 正弦调频 线性调频
Keywords:
interference suppression frequency modulation interference pseudo random code continuous wave radars sine frequency modulation linear frequency modulation
分类号:
TN973. 3
摘要:
针对当调频( FM) 干扰超出伪码调相连续波雷达自身抗干扰容限时相关输出严重恶化 的问题,提出了一种基于S-method 的FM 干扰抑制方法。该方法首先计算回波信号的S-method 分布,估计干扰信号的瞬时频率及瞬时相位,并通过迭代校正方法提高相位估计精度,基于最终 的估计相位,构造干扰对消器实现干扰抑制。对正弦调频和线性调频干扰抑制前后的相关输出 进行了仿真分析。结果表明,在信干比( SJR) 分别为-20 dB 和-25 dB 的条件下,该方法能够有 效抑制干扰,实现目标正常检测。
Abstract:
In view of the problem that the correlation output deteriorates greatly when the frequency modulation( FM) interference power exceeds the anti-jamming limitation of the pseudo random code continuous wave( PRC-CW) radar,a method is proposed based on S-method for FM interference suppression. The method computes the S-method distribution of the echo signal and instantaneous frequency and instantaneous phase of the interference. The calculation accuracy of the phase is improved by iterative correction. The interference canceller is constructed to implement interference suppression according to the final phase estimation. The correlation outputs under sine FM and linear FM interferences cases are simulated with SJR -20 dB and -25 dB respectively. The results show that the method can effectively suppress the FM interference and implement target detection.

参考文献/References:

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相似文献/References:

[1]陈文武,蔡征宇,陈如山.基于ASTFT和中值滤波的PRC-CW雷达FM干扰抑制方法[J].南京理工大学学报(自然科学版),2011,(02):230.
 CHEN Wen-wu,CAI Zheng-yu,CHEN Ru-shan.FM Interference Suppression for PRC-CW Radar Based on ASTFT and Median Filtering[J].Journal of Nanjing University of Science and Technology,2011,(06):230.

备注/Memo

备注/Memo:
作者简介: 王志华( 1964-) ,男,高级工程师,主要研究方向: 雷达信号处理、自动测试系统,E-mail: wzh99@ vip. sina. com; 通讯作者: 赵兆( 1979-) ,男,博士,主要研究方向: 雷达信号处理、时频分析,E-mail: skysoarer@21cn. com。
更新日期/Last Update: 2012-10-25