基于多普勒通道对齐的多帧步进频信号速度补偿方法
doi: 10.3724/SP.J.1146.2008.00903 cstr: 32379.14.SP.J.1146.2008.00903
Multi-frame Stepped-Frequency Signal Processing Based on Doppler Bin Alignment
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摘要: 该文分析了利用多帧步进频信号联合处理实现运动目标距离-速度2维高分辨检测的信号处理方法，并针对目标运动引起处理结果波形发散的问题，提出了基于多普勒通道对齐的速度补偿方法。该方法利用不同步进频点测速结果之间的关系，通过对各频点的多普勒频域数据进行重组以及相位补偿，实现对运动目标的速度补偿。该算法可以在不需要任何目标速度先验信息的情况下，同时实现多个运动目标的速度补偿。理论分析及仿真表明，这一信号处理方法能够有效地补偿目标运动的影响，得到运动目标的距离-速度2维高分辨像，并且算法简单，运算量低，易于实现。Abstract: This paper presents a multi-frame stepped-frequency signal processing method to detect moving targets, and a Doppler bin alignment method is proposed to compensate the image aliasing caused by moving targets. This method makes use of the relationship of Doppler bins among different sub-frequencies and can realize the velocity compensation of moving targets via the rearrangement of Doppler bins and phase compensation. This algorithm can simultaneously compensate the effects of linear range migration for all moving targets without knowing their unknown velocity. Analysis and simulation results show that this processing can image the range and velocity of moving targets simultaneously with stepped-frequency signals and can be applied easily because of its computational efficiency.
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