米波双基地雷达超高声速目标检测方法研究

针对传统探测方法对临近空间超高声速目标探测存在探测概率低,技术难度大等问题,理论分析了利用双基地雷达探测临近空间超高声速目标的问题,着重讨论了临近空间目标不同周期回波包络的跨距离单元走动问题,并分别从时域和频域作出解释.通过理论分析,提出应用keystone（楔形）变换解决上述问题,实现双基地雷达多脉冲积累.最后,通过MATLAB平台进行仿真实验,验证了基于keystone变换改进检测方法的准确性和可行性.

Methods of Detection of Hypersonic Objects Using Metric-Band Bistatic Radars

Detection of near-space hypersonic objects is currently one of the hottest issues of research in academic circles.Theoretical analysis is done in this paper on detection of near-space hypersonic objects with bistatic radars as the probability is low and technical challenge is daunting to use traditional ways of detection.Discussion is focused on the phenomenon of walking range migration of echo envelope of near-space objects in different phases and explanations are given from time domain and frequency domain respectively.Based on feasibility study,keystone transform algorithm is proposed to solve the problems to facilitate multi-pulse accumulation of bistatic radars.Results of MATLAB simulation experiments validate the accuracy and feasibility of the improved detection method based on keystone transform.