摘要
文中基于起伏散射截面积RCS,对机载脉冲多普勒(PD)雷达的地杂波仿真问题,介绍了基于相干视频信号的模拟方法,给出了具体的公式、原理和步骤。此方法有三个优点:首先,有利于地面散射环境的模拟,其次,用起伏的RCS代替平均RCS,增强了杂波模拟的真实性,最后,由于采用了相干视频信号使杂波的仿真可以应用于信号级的系统仿真中。文中对不同脉冲重复频率(PRF)下的地杂波进行了仿真和分析,讨论了距离模糊和多普勒模糊对杂波谱的影响。仿真结果与理论计算吻合较好,表明这种估算地杂波的方法正确有效。
To solve the simulation problem of ground clutter with fluctuant radar cross - section （RCS） received by airborne pulse Doppler （PD） radar, a method based on the analysis of coherent video signal is illustrated in this paper. Its theory, basic principles, formula and program steps are discussed in detail. This method has three advantages. First, it is suited for the simulation of ground environment scattering ; next, the simulation authenticity is improved by replacing average RCS by fluctuant RCS; finally, the utilization of the coherent video signal makes the clutter simulation possible in the system simulation in signals. Computer simulation is made for different pulse repetition frequencies （PRF） which affect the ground clutter. This paper also discusses the influence of ground clutter spectrum with range ambiguity and Doppler ambiguity. The agreement of the simulation with the theoretical calculation indicates that this method can be used to estimate the ground clutter correctly and effectively.
出处
《电子科技》
2007年第3期43-47,共5页
Electronic Science and Technology
关键词
起伏RCS
地杂波
距离模糊
多普勒模糊
fluctuant RCS
ground clutter
simulation
range ambiguity
Doppler ambiguity
