研究了基于步进频率波形的相推测速技术,建立了空间目标宽带步进频率雷达回波信号仿真模型,提出了多脉冲串步进频率信号相位斜率运动参数估计方法,考虑了目标本身的电磁散射特性和微动对算法估计性能的影响。在低信噪比情况下,结合恒虚警率检测与形态学滤波技术能够对噪声进行有效抑制,提高了算法的鲁棒性和测速精度。

The phase derived velocity technique using stepped-frequency waveform is investigated. A wideband stepped-frequency radar signal model of the space object is developed. And the motion estimation methods based on the phase slope of multiple bursts stepped-frequency signals is proposed. The influences of electromagnetic scattering and the micro-motion on the radar returns are investigated. In the cases of lower signal to noise ratio, constant false alarm rate detection and morphological filtering are subsequently adopted to suppress the noise, improve the robustness and further enhance the velocity accuracy.

TN957.51