无人机集群协同探测距离解模糊方法

与传统单平台机载雷达相比,无人机(unmanned aerial vehicle,UAV)集群协同探测具有探测范围广、探测精度高、布阵机动灵活等突出优势,因此是未来机载预警雷达发展的重要方向之一.由于UAV集群雷达阵列具有大尺寸、超稀疏孔径,因此雷达回波近似为球面波且具有较强近场效应.本文首先推导了UAV集群稀疏阵列在...

Resolving range ambiguity for cooperative detection using UAV swarms

Compared with traditional monostatic airborne radar,distributed cooperative detection using unmanned aerial vehicle(UAV)swarms has many advantages such as wider detection range,higher detection accuracy and more flexible array arrangement.Consequently,it is one of the important directions for the development of airborne warning radar systems in the future.As UAV swarms radar array has a large size and ultra-sparse aperture,its echo is approximately spherical and has the strong near-field effect.In this paper,the space-time signal model of UAV swarms sparse array under the near-field condition is firstly derived.Then a novel method for resolving range ambiguity is proposed,which is based on the near-field characteristics of the target echo.For each range bin,the proposed method calculates multiple space-time weight coefficients for clutter suppression and target matching,in which the difference of the target echoes within different ambiguous ranges is utilized.And the actual range ambiguous number of the target can be resolved via comparing the target power of all the filtering results.Simulation results validate the effectiveness of the proposed method.