| 宽带数字阵列雷达的空时耦合效应及补偿 |
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| 引用本文： | 韦文,李宁,彭应宁. 宽带数字阵列雷达的空时耦合效应及补偿[J]. 清华大学学报(自然科学版), 2011, 0(8): 1021-1026 |
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| 作者姓名： | 韦文 李宁 彭应宁 |
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| 作者单位： | 清华大学电子工程系; |
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| 基金项目： | 国家部委基金资助项目(20094010040) |
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| 摘 要： | 为了分析和补偿宽带数字阵列雷达中宽带自适应数字波束形成(adaptive digital beamforming,ADBF)和数字脉冲压缩(digital pulse compression,DPC)的空时级联处理所存在空时耦合效应,建立了频域宽带ADBF与DPC空时级联处理的信号模型,分析得出频域ADBF会引起DPC结果的旁瓣升高,并影响对微弱目标的检测性能。在此基础上,提出了基于目标跟踪和阵列预调向处理的补偿方法,使得信号从正侧视方向入射。仿真结果表明:当主波束对目标的跟踪精度控制在一半的主波束宽度以内时,采用频域ADBF和DPC级联结构所产生的虚假旁瓣可控制在-50dB以下,有效地减小了耦合效应对DPC结果的影响。
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| 关 键 词： | 相控阵雷达 宽带自适应波束形成 空时耦合效应 线性调频信号 数字脉冲压缩 |
Space-time coupling compensation in broadband digital array radar |
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| WEI Wen,LI Ning,PENG Yingning. Space-time coupling compensation in broadband digital array radar[J]. Journal of Tsinghua University(Science and Technology), 2011, 0(8): 1021-1026 |
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| Authors: | WEI Wen LI Ning PENG Yingning |
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| Affiliation: | WEI Wen,LI Ning,PENG Yingning(Department of Electronic Engineering,Tsinghua University,Beijing 100084,China) |
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| Abstract: | A signal model of frequency-domain wideband adaptive digital beamforming(ADBF) and digital pulse compression(DPC) for wideband digital array radar(WB-DAR) first was developed to analyze the coupling between these two.The frequency-domain ADBF can raise the sidelobe level of the high-resolution range profiles obtained by the DPC which can adversely affect the detection of weak targets.A compensation method is given based on target tracking and pre-steering of the array beam to receive the desired signal from... |
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| Keywords: | phased array radar wideband adaptive digital beamforming(ADBF) space-time coupling linear frequency modulated(LFM) signal digital pulse compression(DPC) |
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