摘要
相对于功能仿真,雷达信号仿真的逼真度高,但运算量大。为了满足实时性要求,在构建雷达仿真模型中,采用了窄脉冲无调制信号代替线性调频(LFM)信号。对信号模型简化引起的误差进行了分析。首先分析了LFM信号通过相控阵天线后包络的变化,由此引起的对探测距离的影响,然后针对探测海上低空飞行的目标,研究了经海面多路径反射回雷达的目标回波的频谱,并仿真出两种信号的回波幅度。结果表明,信号简化对距离探测和传播特性的仿真无影响。文中分析方法在构建仿真模型时具有一定的借鉴作用。
Compared to functional simulation,radar signal simulation has high fidelity,but requires more calculations.For real-time radar simulation system,non-modulated narrow pulse is adopted in model instead of LFM signal.This paper analyses simulation errors introduced by signal model simplification. Firstly,the envelop change after LFM signal passing the phased array antenna is analyzed,as well as the effects on the detection range.Then,for the low flying target above the sea,the spectrum of the target return,which is multi-path reflected by sea,is researched also.The echo signal amplitude of the two types of signal is simulated.Final results show that simplified signal has no influence on the simulation of detection range,nor the propagating properties.The view of this paper has reference values in modeling radar simulation system.
出处
《雷达科学与技术》
2014年第5期493-496,共4页
Radar Science and Technology
