【摘要】 针对高频地波雷达特点,结合模糊函数理论,推导了调频中断连续波(FMICW)信号的模糊函数。分析了影响单基地调频中断连续波雷达信号的距离和多普勒分辨率的因素。对于双/多基地调频中断连续波雷达信号,其模糊函数是关于双基地角的函数。当目标靠近基线时,模糊函数形状将展宽,目标分辨率显著降低。数学分析与仿真结果表明其分辨率与FMICW信号形式有关,且还受目标位置影响。通过适当增加发射站和接收站能够提高FMICW雷达信号对目标的分辨能力。更多还原

【Abstract】 In view of the characteristics of a high-frequency ground wave radar,the ambiguity function of frequency modulated interrupted continuous wave(FMICW)signal is derived based on the principle of ambiguity function.Range resolution and Doppler resolution which influence monostatic FMICW radar signal are analyzed.Furthermore,the ambiguity function of bistatic or multistatic FMICW radar signals is concerned with the bistatic angle.When the target is in the vicinity of the baseline,the shape of ambiguity function is stretched and the target resolution is evidently degraded.Mathematical analysis and simulation results show that the resolution is related to the FMICW signal form and affected by the target position.The target resolution of the FMICW radar signal is higher when more transmitters and receivers are properly used.更多还原