中文摘要：

为提高MIMO雷达在电子战中的生存能力，分析了雷达各参数与其搜索性能及射频隐身性能的关系，建立了MIMO雷达搜索模式下的射频隐身性能优化模型，其中射频隐身性能综合考虑了MIMO雷达的截获因子及搜索帧周期。在此基础上，给出了一种MIMO雷达搜索模式下的射频隐身优化算法，该算法通过自适应地控制雷达系统天线划分的子阵数、信号占空比、波束驻留时间以及搜索帧周期，在满足雷达系统检测性能及搜索时间资源约束的要求下，优化雷达系统的射频隐身性能。仿真结果表明，MIMO 雷达采用搜索模式下的射频隐身算法，能在保证检测性能的条件下，相比非射频隐身的搜索状态，获得更好的射频隐身性能。

英文摘要：

In order to improve the viability of MIMO radar in electronic warfare, the relationship between radar parameters and its searching performance as well as the Radio Frequency （RF） stealth performance is firstly analyzed. An RF stealth optimization model considering both the intercept factor and the searching frame period is formulated for MIMO radar in searching mode. Based on the above model, an optimization algorithm of RF stealth for MIMO radar in searching mode is introduced, where the sub-array number, signal duty cycle, dwell time and searching frame period are controlled adaptively to optimize the RF stealth performance under the constraints of detection performance and time resource of the system. Simulation results show that with RF stealth algorithm in searching mode, MIMO radar can achieve desired detection performance and obtain better RF stealth performance compared with traditional phased array radar.