中文摘要：

在宽带雷达目标回波信号的半实物计算中，需要同时满足实时性和仿真精度的要求。提出一种基于线性调频（1inear frequency modulation，LFM）子脉冲的宽带雷达目标回波模拟方法，将LFM脉冲信号分成若干个窄带、短时线性调频子脉冲，通过计算各个子脉冲对应的目标回波信号，来重构全脉冲的宽带目标回波信号。采用这种方法可大幅度减少算法的运算量，显著降低了算法对硬件资源的要求，提高了算法的实时性。计算机仿真结果证明了方法的可行性并具有较高的计算精度。

英文摘要：

In the hardware-in-the-loop calculation of the wideband radar target echo signal, the system needs to meet the requirements of real-time and simulation accuracy simultaneously. A method of wideband ra- dar target echo signal simulation based on linear frequency modulation （LFM） sub-pulse is proposed, which di- vides the LFM pulse signal into several narrowband and short-term linear frequency modulation pulses, and re- constructs the broadband target echo signal of the full pulse by calculating the target echo signal which corre- sponds to each sub-pulse. The computational load and the requirement for the hardware resources of the algo- rithm can be efficiently reduced, thus the real-time performance of the algorithm is improved as well. The com- puter simulation demonstrates that this method is feasible and has high calculation accuracy.