雷达间歇辐射对测向交叉定位性能的影响分析

针对雷达采取间歇辐射的射频隐身管控措施，以双站测向交叉定位为例，该文研究了辐射时间比与定位性能的影响关系。首先分析了雷达间歇辐射的管控方法，然后在载机做匀速直线运动的假设下，采用克拉美罗下界(CRLB)方法，建立了辐射时间比对定位精度的影响模型。最后给出了模型的求解步骤并进行了仿真验证。仿真结果表明，不同辐射时间比对定位性能的影响不同，在初始距离为100 km，辐射时间比小于0.5时，定位收敛时间超过10 s，可以有效降低测向交叉定位的性能。

Analysis for Effect of Radar Intermittent Radiation on the Performance of Cross Location

For the radio frequency stealth control measure of radar intermittent radiation, the relationship between radiation time ratio and positioning performance is studied which takes cross location with two stations as an example. Firstly, the control method of radar intermittent radiation is analyzed. Then, under the assumption of uniform linear motion of the carrier aircraft, the influence model of radiation time ratio on positioning accuracy is established by using the Cramer-Rao Lower Bound (CRLB). Finally, the solution steps of the model are given and verified by simulation. The simulation results show that different radiation time ratios have different effects on the location performance. When the initial distance is 100 km and the radiation time ratio is less than 0.5, the location convergence time exceeds 10 s, which can effectively reduce the performance of cross location with two stations.