一种改进的知识辅助MIMO雷达空时自适应处理方法
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摘要
针对机载多输入多输出(MIMO)雷达杂波抑制问题,该文提出一种改进的基于知识辅助的空时自适应信号处理算法(KA-STAP)。根据杂波在空时2维平面的先验分布离线构造杂波子空间,以此替代基于扁长椭球波函数(PSWF)估计的杂波子空间,避免了复杂运算。仿真结果表明,所提方法不仅能减小运算量,还能获得更深的零陷以及更优的旁瓣性能。
Focusing on the clutter suppression problem of the airborne Multiple Input Multiple Output(MIMO)radar, an improved method based on Knowledge-Aided Space-Time Adaptive signal Processing(KA-STAP)algorithm is proposed. The clutter subspace is constructed offline according to the prior distribution of the clutter in the space-time plane, to replace that of estimation based on the Prolate Spheroidal Wave Function(PSWF), so that complex operations are avoided. Simulation results show that the proposed approach can not only reduce the computational complexity, but can obtain deeper notch and better side-lobe performance.
Focusing on the clutter suppression problem of the airborne Multiple Input Multiple Output(MIMO)radar, an improved method based on Knowledge-Aided Space-Time Adaptive signal Processing(KA-STAP)algorithm is proposed. The clutter subspace is constructed offline according to the prior distribution of the clutter in the space-time plane, to replace that of estimation based on the Prolate Spheroidal Wave Function(PSWF), so that complex operations are avoided. Simulation results show that the proposed approach can not only reduce the computational complexity, but can obtain deeper notch and better side-lobe performance.
引文
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[2]WEN Cai,PENG Jinye,ZHOU Yan,et al.Enhanced threedimensional joint domain localized STAP for airborne FDA-MIMO radar under dense false-target jamming scenario[J].IEEE Sensors Journal,2018,18(10):4154-4166.doi:10.1109/JSEN.2018.2820905.
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[4]WANG Ting,ZHAO Yongjun,HUANG Jie,et al.Areduced-rank STAP algorithm for simultaneous clutter plus jamming suppression in airborne MIMO radar[C].2017 18th International Radar Symposium(IRS),Prague,The Czech Republic,2017:1-10.doi:10.23919/IRS.2017.8008095.
[5]FENG Weike,ZHANG Yongshun,and HE Xingyu.Clutter rank estimation for reduce-dimension space-time adaptive processing MIMO radar[J].IEEE Sensors Journal,2017,17(2):238-239.doi:10.1109/JSEN.2016.2632308.
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[7]CHEN Cheng,HE Junjie,YUAN Zeshi,et al.Robust STAPfor MIMO radar based on direct data domain approach[J].International Journal of Antennas and Propagation,2017:1-9.doi:10.1155/2017/6967130.
[8]BRIGUI F,BOIZARD M,GINOLHAC G,et al.New lowrank filters for MIMO-STAP based on an orthogonal tensorial decomposition[J].IEEE Transactions on Aerospace and Electronic Systems,2018,54(3):1208-1220.doi:10.1109/TAES.2017.2776679.
[9]王珽,赵拥军,赵闯.基于发射波束域-三迭代的机载MIMO雷达STAP方法[J].电子与信息学报,2016,38(5):1034-1040.doi:10.11999/JEIT150741.WANG Ting,ZHAO Yongjun,and ZHAO Chuang. Airborne MIMO radar STAP method based on transmit beamspace-tri-iterative algorithm[J].Journal of Electronics&Information Technology,2016,38(5):1034-1040.doi:10 .11999/JEIT150741.
[10]GERLACH K and PICCIOLO M L.Airborne/spacebased radar STAP using a structured covariance matrix[J].IEEETransactions on Aerospace and Electronic Systems,2003,39(1):269-281.doi:10.1109/TAES.2003.1188909.
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[12]CHEN Chunyang,and VAIDYANATHAN P P.MIMOradar space-time adaptive processing using prolate spheroidal wave functions[J].IEEE Transactions on Signal Processing,2008,56(2):623-635.doi:10.1109/TSP.2007.907917.
[13]翟伟伟,张弓,刘文波.基于杂波子空间估计的MIMO雷达降维STAP研究[J].航空学报,2010,31(9):1824-1831.ZHAI Weiwei,ZHANG Gong,and LIU Wenbo.Study of reduced-rank STAP based on estimation of clutter subspace for MIMO radar[J].Acta Aeronautica et Astronautica Sinica,2010,31(9):1824-1831.
[14]BEFGIN J S,TEIXEIRA C M,TECHAU P M,et al.Improved clutter mitigation performance using knowledgeaided space-time adaptive processing[J].IEEE Transactionson Aerospace and Electronic Systems,2006,42(3):487-494.doi:10.1109/TAES.2006248194.
[15]STOICA P,LI Jian,XU Min,et al.On using a priori knowledge in space-time adaptive processing[J].IEEETransactions on Signal Processing,2008,56(6):437-444.doi:10.1109/TSP.2007.914347.
[16]陆达,张弓.知识辅助的机载MIMO雷达降秩STAP算法[J].数据采集与处理,2012,27(4):429-435.doi:10.3969/j.issn.1004-9037.2012.04.006.LU Da and ZHANG Gong.Knowledge-aided reduced-rank STAP algorithm for airborne MIMO radar[J].Journal of Data Acquisition&Processing,2012,27(4):429-435.doi:10.3969/j.issn.1004-9037.2012.04.006.
[17]吕晖,冯大政,和洁,等.一种简化的机载MIMO雷达杂波特征相消器[J].航空学报,2011,32(5):866-872.LüHui,FENG Dazheng,HE Jie,et al.A simplified eigencanceler for airborne MIMO radar clutter suppression[J].Acta Aeronoutica et Astronautica Sinica,2011,32(5):866-872.
[2]WEN Cai,PENG Jinye,ZHOU Yan,et al.Enhanced threedimensional joint domain localized STAP for airborne FDA-MIMO radar under dense false-target jamming scenario[J].IEEE Sensors Journal,2018,18(10):4154-4166.doi:10.1109/JSEN.2018.2820905.
[3]MECCA V F,RAMAKRISHNAN D,and KROLIK J L.MIMO radar space-time adaptive processing for multipath clutter mitigation[C].Proceedings of the 4th IEEEWorkshop on Sensor Array and Multichannel Signal Processing,Waltham,USA,2006:249-253.doi:10.1109/SAM.2006.1706131.
[4]WANG Ting,ZHAO Yongjun,HUANG Jie,et al.Areduced-rank STAP algorithm for simultaneous clutter plus jamming suppression in airborne MIMO radar[C].2017 18th International Radar Symposium(IRS),Prague,The Czech Republic,2017:1-10.doi:10.23919/IRS.2017.8008095.
[5]FENG Weike,ZHANG Yongshun,and HE Xingyu.Clutter rank estimation for reduce-dimension space-time adaptive processing MIMO radar[J].IEEE Sensors Journal,2017,17(2):238-239.doi:10.1109/JSEN.2016.2632308.
[6]REED I S,MALLETT J D,and BRENNAN L E.Rapid convergence rate in adaptive arrays[J].IEEE Transactions on Aerospace and Electronic Systems,1974,10(6):853-863.doi:10.1109/TAES.1974.307893.
[7]CHEN Cheng,HE Junjie,YUAN Zeshi,et al.Robust STAPfor MIMO radar based on direct data domain approach[J].International Journal of Antennas and Propagation,2017:1-9.doi:10.1155/2017/6967130.
[8]BRIGUI F,BOIZARD M,GINOLHAC G,et al.New lowrank filters for MIMO-STAP based on an orthogonal tensorial decomposition[J].IEEE Transactions on Aerospace and Electronic Systems,2018,54(3):1208-1220.doi:10.1109/TAES.2017.2776679.
[9]王珽,赵拥军,赵闯.基于发射波束域-三迭代的机载MIMO雷达STAP方法[J].电子与信息学报,2016,38(5):1034-1040.doi:10.11999/JEIT150741.WANG Ting,ZHAO Yongjun,and ZHAO Chuang. Airborne MIMO radar STAP method based on transmit beamspace-tri-iterative algorithm[J].Journal of Electronics&Information Technology,2016,38(5):1034-1040.doi:10 .11999/JEIT150741.
[10]GERLACH K and PICCIOLO M L.Airborne/spacebased radar STAP using a structured covariance matrix[J].IEEETransactions on Aerospace and Electronic Systems,2003,39(1):269-281.doi:10.1109/TAES.2003.1188909.
[11]GUERCI J R,GOLDSTEIN J S,and REED I S.Optimal and adaptive reduced-rank STAP[J].IEEE Transactions on Aerospace and Electronic Systems,2000,36(2):647-661.doi:10.1109/7.845255.
[12]CHEN Chunyang,and VAIDYANATHAN P P.MIMOradar space-time adaptive processing using prolate spheroidal wave functions[J].IEEE Transactions on Signal Processing,2008,56(2):623-635.doi:10.1109/TSP.2007.907917.
[13]翟伟伟,张弓,刘文波.基于杂波子空间估计的MIMO雷达降维STAP研究[J].航空学报,2010,31(9):1824-1831.ZHAI Weiwei,ZHANG Gong,and LIU Wenbo.Study of reduced-rank STAP based on estimation of clutter subspace for MIMO radar[J].Acta Aeronautica et Astronautica Sinica,2010,31(9):1824-1831.
[14]BEFGIN J S,TEIXEIRA C M,TECHAU P M,et al.Improved clutter mitigation performance using knowledgeaided space-time adaptive processing[J].IEEE Transactionson Aerospace and Electronic Systems,2006,42(3):487-494.doi:10.1109/TAES.2006248194.
[15]STOICA P,LI Jian,XU Min,et al.On using a priori knowledge in space-time adaptive processing[J].IEEETransactions on Signal Processing,2008,56(6):437-444.doi:10.1109/TSP.2007.914347.
[16]陆达,张弓.知识辅助的机载MIMO雷达降秩STAP算法[J].数据采集与处理,2012,27(4):429-435.doi:10.3969/j.issn.1004-9037.2012.04.006.LU Da and ZHANG Gong.Knowledge-aided reduced-rank STAP algorithm for airborne MIMO radar[J].Journal of Data Acquisition&Processing,2012,27(4):429-435.doi:10.3969/j.issn.1004-9037.2012.04.006.
[17]吕晖,冯大政,和洁,等.一种简化的机载MIMO雷达杂波特征相消器[J].航空学报,2011,32(5):866-872.LüHui,FENG Dazheng,HE Jie,et al.A simplified eigencanceler for airborne MIMO radar clutter suppression[J].Acta Aeronoutica et Astronautica Sinica,2011,32(5):866-872.