直升机载雷达频域成像算法

Imaging algorithm in the frequency domain for helicopter-borne radar

直升机载雷达具有全视域成像、重访周期短等优点,能有效保障直升机等旋翼飞行器的低空飞行安全.针对现有的成像算法存在方位向失配问题,提出了直升机载雷达频域成像算法,通过对直升机载雷达回波进行频域特性分析,从而获取二维精确频谱,并构建频域校正函数和匹配函数,实现回波数据的匹配成像.仿真实验验证了文中算法的有效性.

Helicopter-borne Radar （HeliRadar） has the advantages of full-perspective imaging and short revisit period, which can ensure the rotor aircrafts flight safety at the low altitude. In order to solve the azimuth mismatch problem of the existing algorithm, the HeliRadar imaging algorithm in the frequency domain is presented in this paper. Through the frequency domain analysis of the characteristics of the HeliRadar echo, this new algorithm can obtain a two-dimensional accurate spectrum, construct the frequency domain correction function and the matching function, and achieve the matching imaging. Simulation results verify the effectiveness of the algorithm.