一种无源雷达频域扩展相消批处理杂波对消算法

摘要

Passive radar experiences a significant problem called multipath clutter. The Batch version of the Extensive Cancellation Algorithm (ECA-B) is an efficient method for clutter mitigation. With the increase in signal bandwidth, a greater number of segments is required to cancel the clutter across the entire frequency range. This affects the processing rate, detrimentally weakening and modulating the signal from low-speed targets. Thus, this paper proposes a method that uses ECA-B to process both reference and echo signals in the frequency domain. This method not only reduces the amount of calculation required but also avoids weakening and modulating the target signal, which is spread across many segments. The simulated and experimental data results confirm the correctness and validity of the proposed method.%无源雷达面临着严重的直达波和多径杂波的干扰问题，扩展相消批处理算法(ECA-B)是一种有效的杂波抑制算法，但是随着信号带宽的增加，结合计算效率的考虑，需要更多的分段数来对消更多距离单元的杂波，从而使得对消距离单元内的低速目标的削弱和调制问题加剧。针对这个问题该文提出了一种将参考信号与回波信号在频域进行ECA-B处理的方法。该方法不仅可以降低计算量，还可以避免由于分段数过多引起的目标的损失和调制。仿真和实测数据处理结果验证了该文所提方法的正确性和有效性。