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A Novel Long-Time Coherent Integration Method for Moving Target Detection 被引量:2
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作者 Xia Bai Yan Wang +1 位作者 Juan Zhao Ran Tao 《Journal of Beijing Institute of Technology》 EI CAS 2021年第4期340-351,共12页
Long-time coherent integration(LTCI)can remarkably improve the detection ability of radar for moving target.To increase the processing efficiency,this paper proposes a novel LTCI method based on segment time reversing... Long-time coherent integration(LTCI)can remarkably improve the detection ability of radar for moving target.To increase the processing efficiency,this paper proposes a novel LTCI method based on segment time reversing transform(STRT)and chirp z-transform(CZT).In this method,STRT operation is first presented to estimate the Doppler ambiguity factor,and keystone transform(KT)is used to correct the whole range migration(RM).Then,CZT and non-uniform fast Fourier transform(NUFFT)are used to estimate the parameters as well as correct the second and third order Doppler frequency migration(DFM).Compared with the existing methods,the proposed method can achieve RM correction and DFM correction without repetitive operation.The effectiveness of the proposed method is validated by both simulated and real data. 展开更多
关键词 long-time coherent integration range migration Doppler frequency migration
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Radar fast long-time coherent integration via TR-SKT and robust sparse FRFT
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作者 CHEN Xiaolong GUAN Jian +2 位作者 ZHENG Jibin ZHANG Yue YU Xiaohan 《Journal of Systems Engineering and Electronics》 SCIE EI CSCD 2023年第5期1116-1129,共14页
Long-time coherent integration(LTCI)is an effective way for radar maneuvering target detection,but it faces the problem of a large number of search parameters and large amount of calculation.Realizing the simultaneous... Long-time coherent integration(LTCI)is an effective way for radar maneuvering target detection,but it faces the problem of a large number of search parameters and large amount of calculation.Realizing the simultaneous compensation of the range and Doppler migrations in complex clutter back-ground,and at the same time improving the calculation efficiency has become an urgent problem to be solved.The sparse transformation theory is introduced to LTCI in this paper,and a non-parametric searching sparse LTCI(SLTCI)based maneuvering target detection method is proposed.This method performs time reversal(TR)and second-order Keystone transform(SKT)in the range frequency&slow-time data to complete high-order range walk compensation,and achieves the coherent integra-tion of maneuvering target across range and Doppler units via the robust sparse fractional Fourier transform(RSFRFT).It can compensate for the nonlinear range migration caused by high-order motion.S-band and X-band radar data measured in sea clutter background are used to verify the detection performance of the proposed method,which can achieve better detection performance of maneuvering targets with less computational burden compared with several popular integration methods. 展开更多
关键词 radar maneuvering target detection sea clutter long-time coherent integration(LTCI) sparse transformation time reversal(TR) second-order Keystone transform(SKT)
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Detection of UAV Target Based on Continuous Radon Transform and Matched Filtering Process for Passive Bistatic Radar
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作者 Luo Zuo Yuefei Yan +6 位作者 Jun Wang Xin Sang Yan Wang Dongming Ge Lihao Ping Zhihai Wang Congsi Wang 《Journal of Beijing Institute of Technology》 EI CAS 2024年第1期9-18,共10页
Long-time integration technique is an effective way of improving target detection performance for unmanned aerial vehicle(UAV)in the passive bistatic radar(PBR),while range migration(RM)and Doppler frequency migration... Long-time integration technique is an effective way of improving target detection performance for unmanned aerial vehicle(UAV)in the passive bistatic radar(PBR),while range migration(RM)and Doppler frequency migration(DFM)may have a major effect due to the target maneuverability.This paper proposed an innovative long-time coherent integration approach,regarded as Continuous Radon-matched filtering process(CRMFP),for low-observable UAV target in passive bistatic radar.It not only mitigates the RM by collaborative research in range and velocity dimensions but also compensates the DFM and ensures the coherent integration through the matched filtering process(MFP).Numerical and real-life data following detailed analysis verify that the proposed method can overcome the Doppler mismatch influence and acquire comparable detection performance. 展开更多
关键词 passive bistatic radar unmanned aerial vehicle long-time coherent integration Radon-matched filtering process
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基于Keystone变换的长时间相参积累研究 被引量:9
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作者 李春林 吴琳拥 《电子科技》 2013年第6期148-152,共5页
长时间相参积累是提高弱小目标检测的一种有效方法,但随着积累时间的增加,会产生目标跨距离单元走动的问题。文中在信号处理算法中引入Keystone变换来补偿距离走动带来的影响,可以在不需要先验速度信息的情况下,实现目标的长时间积累。... 长时间相参积累是提高弱小目标检测的一种有效方法,但随着积累时间的增加,会产生目标跨距离单元走动的问题。文中在信号处理算法中引入Keystone变换来补偿距离走动带来的影响,可以在不需要先验速度信息的情况下,实现目标的长时间积累。仿真实验验证了Keystone变换实现距离走动补偿的有效性,并形成了一套较完整的雷达信号处理算法。 展开更多
关键词 长时间相参积累 KEYSTONE变换 补偿 信噪比 跨距离单元走动
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Study on moving target detection to passive radar based on FM broadcast transmitter 被引量:4
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作者 Zhu Jiabing Tao Liang Hong yi 《Journal of Systems Engineering and Electronics》 SCIE EI CSCD 2007年第3期462-468,共7页
Target detection by a noncooperative illuminator is a topic of general interest in the electronic warfare field. First of all, direct-path interference (DPI) suppression which is the technique of bottleneck of movin... Target detection by a noncooperative illuminator is a topic of general interest in the electronic warfare field. First of all, direct-path interference (DPI) suppression which is the technique of bottleneck of moving target detection by a noncooperative frequency modulation(FM) broadcast transmitter is analyzed in this article; Secondly, a space-time-frequency domain synthetic solution to this problem is introduced: Adaptive nulling array processing is considered in the space domain, DPI cancellation based on adaptive fractional delay interpolation (AFDI) technique is used in planned time domain, and long-time coherent integration is utilized in the frequency domain; Finaily, an experimental system is planned by considering FM broadcast transmitter as a noncooperative illuminator, Simulation results by real collected data show that the proposed method has a better performance of moving target detection. 展开更多
关键词 passive radar direct path interference adaptive beamforming adaptive fractional delay interpolation long-time coherent integration.
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