一种天波雷达电离层幅相复合污染时频校正方法
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摘要
针对幅度污染和大幅度相位污染导致谱峰重叠的情况,提出一种时频校正方法.根据信号的重排平滑伪Wigner-Ville分布(RSPWD)谱图估计瞬时频率初步校正相位污染,然后自适应提取标校信号并精确校正幅度污染和剩余的相位污染.理论分析和仿真结果表明,该方法所用RSPWD谱图的交叉项比平滑伪Wigner-Ville分布(SPWD)小,校正幅度污染和相位污染残留的计算量比最大似然估计法(MLE)小,可同时校正电离层幅度污染和大幅度相位污染.
This paper proposes a time-frequency correction method as a solution to the peak-overlap caused by amplitude contamination and large-scale phase contamination. This method is used to estimate the instantaneous frequency based on the rearrangement smooth pseudo Wigner-Ville distribution(RSPWD) spectrum to preliminarily eliminate the phase contamination, and then self-adaptively extracts the calibration signal to correct amplitude contamination and residual phase contamination precisely. The theoretical analysis and simulation results show that in the proposed method the cross term of the RSPWD spectrum is smaller than the smooth pseudo Wigner-Ville distribution(SPWD); the calculated amount of correcting the amplitude contamination and phase residual contamination is less than that of maximum likelihood estimation(MLE), and this method can simultaneously eliminate ionosphere amplitude contamination and large-scale phase contamination.
This paper proposes a time-frequency correction method as a solution to the peak-overlap caused by amplitude contamination and large-scale phase contamination. This method is used to estimate the instantaneous frequency based on the rearrangement smooth pseudo Wigner-Ville distribution(RSPWD) spectrum to preliminarily eliminate the phase contamination, and then self-adaptively extracts the calibration signal to correct amplitude contamination and residual phase contamination precisely. The theoretical analysis and simulation results show that in the proposed method the cross term of the RSPWD spectrum is smaller than the smooth pseudo Wigner-Ville distribution(SPWD); the calculated amount of correcting the amplitude contamination and phase residual contamination is less than that of maximum likelihood estimation(MLE), and this method can simultaneously eliminate ionosphere amplitude contamination and large-scale phase contamination.
引文
[1]周文瑜,焦培南.超视距雷达技术[M].北京:电子工业出版社,2008:6-7.
[2]姜维,邓维波,杨强.基于分段多项式建模的电离层污染校正算法研究[J].遥测遥控,2011,32(4):41-46.
[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):129-133.
[4]LU Kun,WANG Jiong,LIU Xingzhao.A piecewise parametric method based on polynomial phase model to compensate ionospheric phase contamination[C]//Proceedings of ICASSP.IEEE,2003:405-408.
[5]BOURDILLON A,GAUTHIER F.Use of maximum entropy spectral analysis to improve ship detection by over-thehorizon radar[J].Radio Science,1987,22(2):313-320.
[6]HOWLAND P E,COOPER D C.Use of the Wigner-Ville distribution to compensate for ionospheric layer movement in high-frequency sky-wave radar systems[J].IEE Proceedings-F,1993,140(1):29-36.
[7]LI Xue,LU Zhuanxia,GUO Wenling.An improved timefrquency distribution method for ionosphere phase decontamination[C]//Proceedings of the 2012 10th International Symposium on Antennas,Propagation&EM Theory(ISAPE).2012:571-574.
[8]LI Xue,WANG Rui,YANG Dongsheng,et al.Research on ionospheric phase decontamination for OTHR[C]//Proceedings of the URSI in General Assembly and Scientific Symposium.2014:1-4.
[9]罗欢,陈建文,鲍拯.一种天波超视距雷达电离层相位污染联合校正方法[J].电子与信息学报,2013,35(12):2829-2835.
[10]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):660-666.
[11]LIUYanhui,NIE Zaiping,ZHAO Zhiqin.Cascaded approach for correcting ionospheric frequency modulation in HF sky-wave radars[J].电子科技大学学报,2009,38(1):17-20.
[12]鲁转侠,凡俊梅,柳文,等.基于高分辨时频分析解电离层相位污染研究[J].中国电子科学研究院学报,2016,11(1):88-93.
[13]罗欢,陈建文,鲍拯.同时校正电离层幅度和相位污染的MLE方法[J].华中科技大学学报(自然科学版),2013,41(9):17-21.
[14]张立东,李居尚.快速校正天波雷达电离层相位污染的改进方法[J].电讯技术,2016,56(11):1242-1247.
[15]张贤达,保铮.非平稳信号分析与处理[M].北京:国防工业出版社,1988:61-62.
[2]姜维,邓维波,杨强.基于分段多项式建模的电离层污染校正算法研究[J].遥测遥控,2011,32(4):41-46.
[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):129-133.
[4]LU Kun,WANG Jiong,LIU Xingzhao.A piecewise parametric method based on polynomial phase model to compensate ionospheric phase contamination[C]//Proceedings of ICASSP.IEEE,2003:405-408.
[5]BOURDILLON A,GAUTHIER F.Use of maximum entropy spectral analysis to improve ship detection by over-thehorizon radar[J].Radio Science,1987,22(2):313-320.
[6]HOWLAND P E,COOPER D C.Use of the Wigner-Ville distribution to compensate for ionospheric layer movement in high-frequency sky-wave radar systems[J].IEE Proceedings-F,1993,140(1):29-36.
[7]LI Xue,LU Zhuanxia,GUO Wenling.An improved timefrquency distribution method for ionosphere phase decontamination[C]//Proceedings of the 2012 10th International Symposium on Antennas,Propagation&EM Theory(ISAPE).2012:571-574.
[8]LI Xue,WANG Rui,YANG Dongsheng,et al.Research on ionospheric phase decontamination for OTHR[C]//Proceedings of the URSI in General Assembly and Scientific Symposium.2014:1-4.
[9]罗欢,陈建文,鲍拯.一种天波超视距雷达电离层相位污染联合校正方法[J].电子与信息学报,2013,35(12):2829-2835.
[10]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):660-666.
[11]LIUYanhui,NIE Zaiping,ZHAO Zhiqin.Cascaded approach for correcting ionospheric frequency modulation in HF sky-wave radars[J].电子科技大学学报,2009,38(1):17-20.
[12]鲁转侠,凡俊梅,柳文,等.基于高分辨时频分析解电离层相位污染研究[J].中国电子科学研究院学报,2016,11(1):88-93.
[13]罗欢,陈建文,鲍拯.同时校正电离层幅度和相位污染的MLE方法[J].华中科技大学学报(自然科学版),2013,41(9):17-21.
[14]张立东,李居尚.快速校正天波雷达电离层相位污染的改进方法[J].电讯技术,2016,56(11):1242-1247.
[15]张贤达,保铮.非平稳信号分析与处理[M].北京:国防工业出版社,1988:61-62.