自测速频率跳变合成带宽波形设计及处理算法

合成带宽信号通过脉冲间频率跳变与相干处理，等效地合成大带宽，可获得高距离分辨能力。但是，当目标相对于雷达具有径向运动分量时，径向速度引起的多普勒效应会在回波信号中产生相应的一次相位项和二次相位项，严重影响目标一维高分辨距离像的成像质量。通常雷达需额外发射一组窄带脉冲用来辅助测速，极大浪费雷达资源。本文提出一种自测速频率跳变合成带宽波形设计及处理算法，该算法可以在低信噪比下有效估计目标速度信息，相比于现有算法具有更好的普适性和灵活性。同时，可以通过改变相关参数快捷、灵活地改变波形跳变形式，具有较强的抗干扰能力，蕴藏较大的实用潜力与价值。 

Frequency Hopped Synthetic Bandwidth Waveform Design and Processing Algorithm for Self-Speed Measurement

Synthetic bandwidth waveform yields high range resolution with equivalent wide bandwidth by applying hopped frequency and coherent processing between different pulses. However, when a moving target is concerned, the quality of the high range resolution profile would degrade seriously because of the Doppler effect in the linear and quadratic phase items of the echo signal, which is caused by radial velocity of the target. Generally, radar needs to emit another waveform with narrow bandwidth to help measure the target speed but at a cost of added hardware resources. In this paper, a frequency hopped synthetic bandwidth waveform design and processing algorithm for self-speed measurement is proposed. Speed of the target can be effectively measured in low SNR environment, which is superior to many existing methods. In addition, the hopped frequency can be flexibly designed by changing several parameters, which presents good anti-interference performance.