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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。
In order to analyze and compensate the space-time coupling effect of space-time cascade processing of wideband adaptive digital beamforming (ADBF) and digital pulse compression (DPC) in wideband digital array radar, a frequency domain The signal model of the cascaded ADBF and DPC is analyzed. It is found that the frequency domain ADBF can cause the sidelobe increase of the DPC result and affect the detection performance of the weak target. On this basis, a compensation method based on target tracking and array pre-alignment is proposed, which makes the signal incident from the side-view. The simulation results show that the false sidelobe generated by the cascaded ADBF and DPC in the frequency domain can be controlled below -50dB when the tracking accuracy of the main beam is within half of the main beamwidth, effectively reducing the coupling effect Impact on DPC results.