连续波雷达发射泄漏抑制技术研究
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摘要
本文介绍了连续波雷达发射泄漏，成因和对雷达的影响，及列举了几种常规的连续波雷达发射泄漏抑制方法。中断连续波体制是从雷达发射信号入手解决连续波雷达发射泄漏的方法。本文选择调频中断连续波(FMICW)作为研究重点。
根据FMICW信号波形特点，本文利用雷达信号分析工具推导了FMICW的零多谱勒模糊函数并给出了FMICW的零多谱勒模糊函数图，同时比较了随机中断脉冲序列和确定中断脉冲序列对调频中断连续波模糊函数的影响，以及设计确定中断脉冲序列FMICW的参数来获得探测范围内零噪声基底的模糊函数。在FMICW信号处理过程中，提出工程中设计时参数选取准则，用常规处理方法一—二维FFT得出了信号处理的仿真结果。对现有的FMICW信号二维FFT处理方法提出了改进。最后提出了一种适合探测海上高速运动目标的FMICW相关运算处理方法。
This paper introduces the cause of CW radar's transmit leakage and the effects on radar ' operation and illustrate several means to restrain the leakage. Interrupted CW radar is the way using change the radar transmit signal to solve the transmit leakage problem. Frequency modulated interrupted continuous wave(FMICW) is chosen as the emphasis of this paper.
Based on the characteristic of FMICW signal,this paper uses the radar signal analysis tool to deduce the ambiguity function (AF) of FMICW and draw it's Zero-AF figure.At the same time,we compare the AF of random interrupted pulse with that of determinate interrupted pulse and design the parameters of determinate interrupted pulse FMICW signal to gain it's AF with zero noise floor in the all detected range.During the course of FMICW signal process,we put forward the rules of choosing the parameters and get the simulative result using general two-demesion FFT.Current 2D-FFT sianal process is also improved here.Finally a method in
introduced of correlation operation suited to detect high-speed targets on sea.
根据FMICW信号波形特点，本文利用雷达信号分析工具推导了FMICW的零多谱勒模糊函数并给出了FMICW的零多谱勒模糊函数图，同时比较了随机中断脉冲序列和确定中断脉冲序列对调频中断连续波模糊函数的影响，以及设计确定中断脉冲序列FMICW的参数来获得探测范围内零噪声基底的模糊函数。在FMICW信号处理过程中，提出工程中设计时参数选取准则，用常规处理方法一—二维FFT得出了信号处理的仿真结果。对现有的FMICW信号二维FFT处理方法提出了改进。最后提出了一种适合探测海上高速运动目标的FMICW相关运算处理方法。
This paper introduces the cause of CW radar's transmit leakage and the effects on radar ' operation and illustrate several means to restrain the leakage. Interrupted CW radar is the way using change the radar transmit signal to solve the transmit leakage problem. Frequency modulated interrupted continuous wave(FMICW) is chosen as the emphasis of this paper.
Based on the characteristic of FMICW signal,this paper uses the radar signal analysis tool to deduce the ambiguity function (AF) of FMICW and draw it's Zero-AF figure.At the same time,we compare the AF of random interrupted pulse with that of determinate interrupted pulse and design the parameters of determinate interrupted pulse FMICW signal to gain it's AF with zero noise floor in the all detected range.During the course of FMICW signal process,we put forward the rules of choosing the parameters and get the simulative result using general two-demesion FFT.Current 2D-FFT sianal process is also improved here.Finally a method in
introduced of correlation operation suited to detect high-speed targets on sea.
引文
1．徐永元：非协同目标连续波雷达测量技术，电光系统，总第80期，No．4，pp．1-12，1997
2．郦舟剑，王东进：毫米波连续波雷达载波泄漏对消．理论分析与系统仿真，现代雷达，vol．20,No．2，pp．1-11，Apr．1998
3. F.J.O'Hara,G.M.Moor. A High Performance CW Receiver Using Feedthru Nulling. Microwave journal, Sep. 1963
4．沈新江，李世翔：连续波雷达中频对消技术研究，上海航天，No．2,pp．37-40，1998
5. Geoges T M.Coastal Ocean Dynamics Applications Radar-A User's Guide[M].United States Patent 5361072,1994
6. WU Shi-cai,YANG Zi-jie,Qie Chang-rong,et al.OSMAR Test in Beihai[J].J Wuhan Univ(Nat Sci Ed),1994,(special Issue):32-37(Ch).
7．贾鸿志：雷达信号分析，南京理工大学，7．1995
8．杨建宇：LFMCW 雷达信号模糊函数分析，信号处理， vol．18，No．1，pp．39-42,Feb．2002
9. RIHACZEK,A.W. Principles of high resolution radar. Peninsula Publishing,Los Altos,California, 1985
10. POOLE,A.W.V. On the use of pseudorandom codes for "chirp" radar, IEEE Trans, 1979,AP-27,pp.480-485
11. M.I.Skolnik,Radar Handbook. New York:Mcgraw-Hill
12. R.H.Khan and D.Mitcheel. Wave analysis for high frequency FMICW radar .IEE Conf.Radar 87,London, 1987
13．吴世才，杨子杰：高频地波雷达信号波形分析，武汉大学学报(理学版)，vol．47，No．5，pp．5 19-527，Oct．2001
14. Barrick D E.FM/CW Radar Signal and Digital Processing[R].NOAA Technical Report ERL 283-WPL26.1973
15. Barrick D E,Lipa B J. Gated FMCW DF Radar and Signal Processing for Range/Doppler/Angle Determination[p]
16. Barrick D E. EEZ Surveillaince-The Compact HF Radar Alternative[J]. Chinese Radio Science 1998 13(4):423-427(Ch)
17. Uwe.Meyer-Bases:数字信号处理的 FPGA 实现，清华大学出版社， pp. 193-197,Jan.2003
18. A.V.Oppenheim and R.W.Schafcr, Discrete-Time Signal Processing.Englewood Cliffs,NJ:Prectice-Hall, 1989
19．李健巍，权太范：高扫描重复频率FMICW信号的相关处理方法研究，系统工程与电子技术，vol．21,No．2,pp．1-4，1999
20. Lin Yongtan. Target Detection and Tracking with a High Frequency Ground Wave Over-the-Horizon Radar. 1996 CIE International Conference of Radar Proceedings, 1996:29-33
21. Khan R H. Target Detection and Tracking a High-Frequency Ground Wave Radar. IEEE J. Oceanic Eng., 1994,19(4): 540-548
22．章宇兵：一种解决连续波雷达发射机泄漏的新方案，电光系统，总第93期，No．3，pp．44-48，2000
23．张从霞，张平：伪码连续波雷达抑制发射功率泄漏的新技术，火控雷达技术，vol．23,pp．44-51，May．1994
24．谢军伟，张旭春：连续波雷达中频自适应对消技术，无线电工程，vol．29，No．3，pp．4-5，1999
25．杨子杰，吴世才等：高频地波雷达总体方案及工程实施中的几个主要问题，武汉大学学报(理学版)，vol．47，No．5，pp．513．518,Oct．2001
26．田建生，吴世才等：FMICW雷达海洋回波信号频率间断点和频率混叠的处理，武汉大学学报(理学版)，vol．47，No．5，pp．569-572，Oct．2001
27．冀振元，孟宪德等：高频雷达中LFMCW信号的分析，系统工程与电子技术，vol．21，No．12,pp．14-16，19，1999
28. Stove A G. Linear FMCW Radar Techniques. IEE Proceedings-F,1992,139(5):343-350
2．郦舟剑，王东进：毫米波连续波雷达载波泄漏对消．理论分析与系统仿真，现代雷达，vol．20,No．2，pp．1-11，Apr．1998
3. F.J.O'Hara,G.M.Moor. A High Performance CW Receiver Using Feedthru Nulling. Microwave journal, Sep. 1963
4．沈新江，李世翔：连续波雷达中频对消技术研究，上海航天，No．2,pp．37-40，1998
5. Geoges T M.Coastal Ocean Dynamics Applications Radar-A User's Guide[M].United States Patent 5361072,1994
6. WU Shi-cai,YANG Zi-jie,Qie Chang-rong,et al.OSMAR Test in Beihai[J].J Wuhan Univ(Nat Sci Ed),1994,(special Issue):32-37(Ch).
7．贾鸿志：雷达信号分析，南京理工大学，7．1995
8．杨建宇：LFMCW 雷达信号模糊函数分析，信号处理， vol．18，No．1，pp．39-42,Feb．2002
9. RIHACZEK,A.W. Principles of high resolution radar. Peninsula Publishing,Los Altos,California, 1985
10. POOLE,A.W.V. On the use of pseudorandom codes for "chirp" radar, IEEE Trans, 1979,AP-27,pp.480-485
11. M.I.Skolnik,Radar Handbook. New York:Mcgraw-Hill
12. R.H.Khan and D.Mitcheel. Wave analysis for high frequency FMICW radar .IEE Conf.Radar 87,London, 1987
13．吴世才，杨子杰：高频地波雷达信号波形分析，武汉大学学报(理学版)，vol．47，No．5，pp．5 19-527，Oct．2001
14. Barrick D E.FM/CW Radar Signal and Digital Processing[R].NOAA Technical Report ERL 283-WPL26.1973
15. Barrick D E,Lipa B J. Gated FMCW DF Radar and Signal Processing for Range/Doppler/Angle Determination[p]
16. Barrick D E. EEZ Surveillaince-The Compact HF Radar Alternative[J]. Chinese Radio Science 1998 13(4):423-427(Ch)
17. Uwe.Meyer-Bases:数字信号处理的 FPGA 实现，清华大学出版社， pp. 193-197,Jan.2003
18. A.V.Oppenheim and R.W.Schafcr, Discrete-Time Signal Processing.Englewood Cliffs,NJ:Prectice-Hall, 1989
19．李健巍，权太范：高扫描重复频率FMICW信号的相关处理方法研究，系统工程与电子技术，vol．21,No．2,pp．1-4，1999
20. Lin Yongtan. Target Detection and Tracking with a High Frequency Ground Wave Over-the-Horizon Radar. 1996 CIE International Conference of Radar Proceedings, 1996:29-33
21. Khan R H. Target Detection and Tracking a High-Frequency Ground Wave Radar. IEEE J. Oceanic Eng., 1994,19(4): 540-548
22．章宇兵：一种解决连续波雷达发射机泄漏的新方案，电光系统，总第93期，No．3，pp．44-48，2000
23．张从霞，张平：伪码连续波雷达抑制发射功率泄漏的新技术，火控雷达技术，vol．23,pp．44-51，May．1994
24．谢军伟，张旭春：连续波雷达中频自适应对消技术，无线电工程，vol．29，No．3，pp．4-5，1999
25．杨子杰，吴世才等：高频地波雷达总体方案及工程实施中的几个主要问题，武汉大学学报(理学版)，vol．47，No．5，pp．513．518,Oct．2001
26．田建生，吴世才等：FMICW雷达海洋回波信号频率间断点和频率混叠的处理，武汉大学学报(理学版)，vol．47，No．5，pp．569-572，Oct．2001
27．冀振元，孟宪德等：高频雷达中LFMCW信号的分析，系统工程与电子技术，vol．21，No．12,pp．14-16，19，1999
28. Stove A G. Linear FMCW Radar Techniques. IEE Proceedings-F,1992,139(5):343-350