改进的相位梯度法解电离层相位污染的方法
|
摘要
为了修正由电离层时变特性而引起电波信号相位的污染,研究人员开发了大量的算法对回波信号进行去污染。相位梯度法解相位污染是目前一种主要的解电离层相位污染的算法,但是该算法在提取一阶Bragg峰的问题上缺乏自适应的提取算法。在相位梯度法的基础上利用局部熵最小算法和基于功率比的滑窗自适应信号提取算法来其进行优化,利用仿真信号对两种改进算法和原有相位梯度算法进行验证比较。结果表明两种改进后的算法提升了解电离层相位污染的性能,同时提升了整个解相位污染方法的自适应性。此外,根据仿真实验的结果,当信号离Bragg峰更近时,功率比算法优于局部最小熵算法,当信号远离Bragg峰时,两者效果基本一致。
In order to correct the perturbation of the phase of the radio wave signal caused by the time-varying characteristics of the ionosphere,a large number of algorithms was developed to decontaminate the echo signal. The phase gradient algorithm( PGA) is one of algorithms widely used to correct phase perturbations of radio waves.However,this algorithm is not able to adaptively extract the first order Bragg peaks. The minim local entropy algorithm and an adaptive sliding window filter based on power ratio were used to improve the performance of PGA.model studies were carried out to compare the PGA with the PGA improved by the minim local entropy algorithm and the adaptive sliding window. filter Results show that the improved PGAs could perform better than the GPA to correct the perturbation of the phase of the radio wave signal. Moreover,the PGA with the adaptive sliding window filter performed better than that with the minim local entropy algorithm when the target signal is closed to the Bragg signal. However,there is no much difference between these two algorithms when the target signal is far away from the Bragg signal.
In order to correct the perturbation of the phase of the radio wave signal caused by the time-varying characteristics of the ionosphere,a large number of algorithms was developed to decontaminate the echo signal. The phase gradient algorithm( PGA) is one of algorithms widely used to correct phase perturbations of radio waves.However,this algorithm is not able to adaptively extract the first order Bragg peaks. The minim local entropy algorithm and an adaptive sliding window filter based on power ratio were used to improve the performance of PGA.model studies were carried out to compare the PGA with the PGA improved by the minim local entropy algorithm and the adaptive sliding window. filter Results show that the improved PGAs could perform better than the GPA to correct the perturbation of the phase of the radio wave signal. Moreover,the PGA with the adaptive sliding window filter performed better than that with the minim local entropy algorithm when the target signal is closed to the Bragg signal. However,there is no much difference between these two algorithms when the target signal is far away from the Bragg signal.
引文
1郭欣.天波超视距雷达信号处理技术研究[D].南京:南京理工大学,2004Guo Xin. Research on signal processing technology of skywave overthe-horizon radar[D]. Nanjing:Nanjing University of Science and Technology,2004
2 杨志群.天波超视距雷达信号处理方法研究[D].南京:南京理工大学,2003Yang Zhiqun. Study on signal processing method of skywave over-thehorizon radar[D]. Nanjing:Nanjing University of Science and Technology,2003
3 邢孟道,保铮.电离层电波传播相位污染校正[J].电波科学学报,2002,17(2):129-133Xing Mengdao,Bao Zheng. Ionospheric wave propagation phase pollution correction[J]. Journal of Radio Science,2002,17(2):129-133
4 罗欢,陈建文,鲍拯.电离层和海态对天波雷达多普勒谱的影响[J].信号处理,2014,30(5):489-497Luo Huan,Chen Jianwen,Bao Zheng. Effect of ionosphere and oceanic state on doppler spectrum of over the horizon radar[J]. Journal of Signal Processing,2014,30(5):489-497
5 Wu X,Chen J W,Lu K. Investigation of system structure and information processing mechanism for cognitive skywave over-the-horizon radar[J]. Journal of Systems Engineering and Electronics,2016,27(4):797-806
6 Wang J. Target initiation of high frequency surface wave over-the-horizon radar based on information entropy theory[C]//Proceedings of2011 IEEE CIE International Conference on Radar(RADAR 2011).Hefei:China Institute of Electronics(CIE),2011:188-190
7 Jiang W,Deng W B. Characteristic study of ionospheric clutter in high-frequency over the horizon surface wave radar[C]//Proceedings of 2009 IEEE Youth Conference on Information,Computing and Telecommunication. Shanghai:Graduate University of Chinese Academy of Sciences,2009:176-179
8 Fang M,Liu X G. Data interpolation in time and frequency domains using coupled matrix pencil method[C]//Proceedings of 2007 5th International Conference on Microwave and Millimeter Wave Technology. Suzhou:Chinese Institute of Electronics(CIE),2007:982-985
9 Kim E J,Lee Y S,Ko J H,et al. A robust approach for the derivation of closed-form green’s functions for microstrip structures[C]//Proceedings of 2003 6th International Symposium on Antennas,Propagation and EM Theory. Beijing:Chinese Institute of Electronics(CIE),2003:851-854
10 姬勇力,李雪,焦培南.基于局部熵最小电离层相位污染提取算法[J].微计算机信息,2010,26(31):110-111,100Ji Yongli,Li Xue,Jiao Peinan. Minimum ionospheric phase pollution extraction algorithm based on local entropy[J]. Microcomputer Information,2010,26(31):110-111,100
11 李钢,杨仕文,刘颜回,等.天波超视距雷达电离层大幅度相位污染校正算法研究[J].宇航学报,2008,29(2):670-674Li Gang,Yang Shiwen,Liu Yanhui,et al. Research on large phase pollution correction algorithm for ionospheric over-the-horizon radar[J]. Journal of Astronautics,2008,29(2):670-674
12 谢云翔.混合传播模式下海杂波特性分析及抑制方法研究[D].哈尔滨:哈尔滨工业大学,2013Xie Yunxiang. Sea clutter characteristics analysis and suppression methods in hybrid propagation mode[D]. Harbin:Harbin Institute of Technology,2013
13 许丁文,李会勇,胡进峰,等.天波雷达电离层污染校正与海杂波抑制[J].雷达科学与技术,2012,10(6):639-644Xu Dingwen,Li Huiyong,Hu Jinfeng,et al. Skywave radar ionospheric pollution correction and sea clutter suppression[J]. Radar Science and Technology,2012,10(6):639-644
14 李雪.电离层相位污染及多模传播抑制方法研究[D].哈尔滨:哈尔滨工业大学,2012Li Xue. Ionospheric phase pollution and multimode propagation suppression methods[D]. Harbin:Harbin Institute of Technology,2012
15 于文启,陈建文,杨春山.一种天波超视距雷达电离层相位污染的校正算法[J].雷达科学与技术,2015,13(6):660-666Yu Wenqi,Chen Jianwen,Yang Chunshan. An algorithm for correcting ionospheric phase pollution of skywave over-the-horizon radar[J]. Radar Science and Technology,2015,13(6):660-666
2 杨志群.天波超视距雷达信号处理方法研究[D].南京:南京理工大学,2003Yang Zhiqun. Study on signal processing method of skywave over-thehorizon radar[D]. Nanjing:Nanjing University of Science and Technology,2003
3 邢孟道,保铮.电离层电波传播相位污染校正[J].电波科学学报,2002,17(2):129-133Xing Mengdao,Bao Zheng. Ionospheric wave propagation phase pollution correction[J]. Journal of Radio Science,2002,17(2):129-133
4 罗欢,陈建文,鲍拯.电离层和海态对天波雷达多普勒谱的影响[J].信号处理,2014,30(5):489-497Luo Huan,Chen Jianwen,Bao Zheng. Effect of ionosphere and oceanic state on doppler spectrum of over the horizon radar[J]. Journal of Signal Processing,2014,30(5):489-497
5 Wu X,Chen J W,Lu K. Investigation of system structure and information processing mechanism for cognitive skywave over-the-horizon radar[J]. Journal of Systems Engineering and Electronics,2016,27(4):797-806
6 Wang J. Target initiation of high frequency surface wave over-the-horizon radar based on information entropy theory[C]//Proceedings of2011 IEEE CIE International Conference on Radar(RADAR 2011).Hefei:China Institute of Electronics(CIE),2011:188-190
7 Jiang W,Deng W B. Characteristic study of ionospheric clutter in high-frequency over the horizon surface wave radar[C]//Proceedings of 2009 IEEE Youth Conference on Information,Computing and Telecommunication. Shanghai:Graduate University of Chinese Academy of Sciences,2009:176-179
8 Fang M,Liu X G. Data interpolation in time and frequency domains using coupled matrix pencil method[C]//Proceedings of 2007 5th International Conference on Microwave and Millimeter Wave Technology. Suzhou:Chinese Institute of Electronics(CIE),2007:982-985
9 Kim E J,Lee Y S,Ko J H,et al. A robust approach for the derivation of closed-form green’s functions for microstrip structures[C]//Proceedings of 2003 6th International Symposium on Antennas,Propagation and EM Theory. Beijing:Chinese Institute of Electronics(CIE),2003:851-854
10 姬勇力,李雪,焦培南.基于局部熵最小电离层相位污染提取算法[J].微计算机信息,2010,26(31):110-111,100Ji Yongli,Li Xue,Jiao Peinan. Minimum ionospheric phase pollution extraction algorithm based on local entropy[J]. Microcomputer Information,2010,26(31):110-111,100
11 李钢,杨仕文,刘颜回,等.天波超视距雷达电离层大幅度相位污染校正算法研究[J].宇航学报,2008,29(2):670-674Li Gang,Yang Shiwen,Liu Yanhui,et al. Research on large phase pollution correction algorithm for ionospheric over-the-horizon radar[J]. Journal of Astronautics,2008,29(2):670-674
12 谢云翔.混合传播模式下海杂波特性分析及抑制方法研究[D].哈尔滨:哈尔滨工业大学,2013Xie Yunxiang. Sea clutter characteristics analysis and suppression methods in hybrid propagation mode[D]. Harbin:Harbin Institute of Technology,2013
13 许丁文,李会勇,胡进峰,等.天波雷达电离层污染校正与海杂波抑制[J].雷达科学与技术,2012,10(6):639-644Xu Dingwen,Li Huiyong,Hu Jinfeng,et al. Skywave radar ionospheric pollution correction and sea clutter suppression[J]. Radar Science and Technology,2012,10(6):639-644
14 李雪.电离层相位污染及多模传播抑制方法研究[D].哈尔滨:哈尔滨工业大学,2012Li Xue. Ionospheric phase pollution and multimode propagation suppression methods[D]. Harbin:Harbin Institute of Technology,2012
15 于文启,陈建文,杨春山.一种天波超视距雷达电离层相位污染的校正算法[J].雷达科学与技术,2015,13(6):660-666Yu Wenqi,Chen Jianwen,Yang Chunshan. An algorithm for correcting ionospheric phase pollution of skywave over-the-horizon radar[J]. Radar Science and Technology,2015,13(6):660-666