基于GNSS的外辐射源雷达具备潜在的多基地雷达特性,聚焦基于GNSS的外辐射源雷达目标定位和运动参数提取精度分析,利用克拉美-罗下界分析目标定位和运动参数提取精度与卫星个数及目标回波信噪比之间的关系.仿真结果表明,卫星个数越多,目标定位与运动参数提取精度越高;当卫星数量相同时,不同卫星照射下目标回波信噪比相差越小,目标定位与运动参数提取精度越高.
Passive bistatic radars based on GNSS can be inherently considered as multistatic radars.This paper focuses on the accuracy analysis of target localization and kinematic parameter extraction for GNSS-based multistatic radars,and Cramer-Rao Lower Bound(CRLB)is applied to evaluate the relationship between the system accuracy and the number of satellites and the target echo SNR.Sim-ulation results indicate that the accuracy of target localization and kinematic parameter extraction can be improved by using more satellites and decreasing the difference of the target echo SNRs under dif-ferent illumination.