雷达高度表回波模拟及扩展目标算法
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摘要
雷达高度表回波信号具有时域和多普勒域二维展宽特性,将该特性作为目标检测器的先验信息是提高弹载雷达高度表检测性能的重要方法之一。将目标回波看作是若干个散射点回波信号的矢量合成,并考虑载体高速运动对各个散射点回波信号的多普勒调制,提高了目标回波仿真的可信度。仿真模拟了不同地形地貌、不同高度条件下的回波信号,分析了目标回波在时域和多普勒域的展宽及起伏特性。通过在时频域对目标散射点二维分布的估计,设计了一种适用于弹载雷达高度表的改进BS-GLRT检测算法。仿真表明,该检测算法的性能优于现有的检测算法。
The terrain detected by radar altimeter is a range-spread and Doppler-spread target. In order to improve the detection performance of radar altimeter, the detection algorithm partially using the information of the target is gradually becoming the research issue. A high reliable simulation method is presented to get the radar echo. Then, the backscattering and emission signatures of radar echo in time and Doppler domains are analyzed. Finally,a double-threshold detector based on scatter distribution and BS-GLRT is proposed. The performance assessment confirms that the newly-proposed detection algorithm outperforms the previous algorithms.
The terrain detected by radar altimeter is a range-spread and Doppler-spread target. In order to improve the detection performance of radar altimeter, the detection algorithm partially using the information of the target is gradually becoming the research issue. A high reliable simulation method is presented to get the radar echo. Then, the backscattering and emission signatures of radar echo in time and Doppler domains are analyzed. Finally,a double-threshold detector based on scatter distribution and BS-GLRT is proposed. The performance assessment confirms that the newly-proposed detection algorithm outperforms the previous algorithms.
引文
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[11]陈新亮,王丽,柳树林,等.高分辨雷达扩展目标检测算法研究[J].中国科学:信息科学,2012,42(8):1007-1018.
[12]黄培康,殷红成,许小剑.雷达目标特性[M].北京:电子工业出版社,2005.
[13]夏双志,刘宏伟.一种利用序贯判决信息的雷达检测新方法[J].电子学报,2010,38(12):2855-2861.XIA Shuangzhi, LIU Hongwei. A New Radar Detection Method Using Previous Decision Information[J].Acta Electronica Sinica, 2010,38(12):2855-2861(in Chinese).
[14]HE You,GU Xinfeng, JIAN Tao,et al. A M out of N Detector Based on Scattering Density[C]//IET International Radar Conference,Guilin:IET,2009:1-4.
[15]简涛,何友,苏峰,等.非高斯杂波下修正的SDDGLRT距离扩展目标检测器[J].电子学报,2009,37(12):2662-2667.JIAN Tao, HE You, SU Feng, et al. Modified SDDGLRT Detector for Range-Spread Targets in NonGaussian Clutter[J]. Acta Electronica Sinica, 2009,37(12):2662-2667.(in Chinese)
[2]刘建新,陈惠连,向敬成.脉间二相编码脉冲信号的多普勒处理[J].信号处理,2003,19(2):132-134.
[3]张海,彭定之,陈惠连,等.相位编码雷达高度表中宽带多普勒信号的检测[J].电波科学学报,2001,16(1):113-117.
[4]胡英辉,郑远,耿旭朴,等.相位编码信号的多普勒补偿[J].电子与信息学报,2009,31(11):2596-2599.HU Yinghui, ZHENG Yuan, GENG Xupu, et al.Doppler Compensation for Phased-Coded Signals[J].Journal of Electronics and Information Technology,2009,31(11):2596-2599.(in Chinese)
[5]张宏伟,任新涛,汤宫民,等.一种新的相位编码信号多普勒补偿算法研究[J].中国测试,2013,39(2):10-13.
[6]TSENG N Y, BURNSIDE W D. A very Efficient RCSData Compression and Reconstruction Technique[R].Washington,DC:NASA, 1992.
[7]DE MAIO A, FARINA A, GERLACH K. Adaptive Detection of Range Spread Targets with Orthogonal Rejection[J]. IEEE Trans on Aerospace and Electronic Systems,2007,43(2):738-752.
[8]童玲,陈彦,贾明权.雷达遥感机理[M].北京:科学出版社,2014.
[9]EDISON A, MOORE R, WARNER B. Radar Terrain Return Measured at Near-Vertical Incidence[J]. IEEE Trans on Antennas and Propagation, 1960, 8(3):246-254.
[10]郑洋,陈曦,李玉钊,等.超低空导弹引信地面回波功率起伏特性分析与仿真[C]//中国宇航学会上海市宇航学会特种装备专业委员会第十七次学术交流会,绵阳:[出版者不详],2014.
[11]陈新亮,王丽,柳树林,等.高分辨雷达扩展目标检测算法研究[J].中国科学:信息科学,2012,42(8):1007-1018.
[12]黄培康,殷红成,许小剑.雷达目标特性[M].北京:电子工业出版社,2005.
[13]夏双志,刘宏伟.一种利用序贯判决信息的雷达检测新方法[J].电子学报,2010,38(12):2855-2861.XIA Shuangzhi, LIU Hongwei. A New Radar Detection Method Using Previous Decision Information[J].Acta Electronica Sinica, 2010,38(12):2855-2861(in Chinese).
[14]HE You,GU Xinfeng, JIAN Tao,et al. A M out of N Detector Based on Scattering Density[C]//IET International Radar Conference,Guilin:IET,2009:1-4.
[15]简涛,何友,苏峰,等.非高斯杂波下修正的SDDGLRT距离扩展目标检测器[J].电子学报,2009,37(12):2662-2667.JIAN Tao, HE You, SU Feng, et al. Modified SDDGLRT Detector for Range-Spread Targets in NonGaussian Clutter[J]. Acta Electronica Sinica, 2009,37(12):2662-2667.(in Chinese)