摘要
针对两站测向测时差三维目标定位的一般情况,为克服传统解析算法的定位模糊问题,提出了一种基于余弦定理的定位求解方法。该算法在时差和角度信息均可获得的情况下,根据侦察平台和目标在三维空间中的相对几何关系,利用余弦定理给出了无模糊的目标位置解析解。进一步,为充分利用侦察平台冗余的观测信息、提高定位精度,采用简化的加权最小二乘方法对根据不同观测信息解算得到的目标位置估计值进行融合,提出了一种实用的测向测时差融合定位算法。数值仿真验证了所提出的定位求解算法的有效性。
To eliminate the deficiency of location ambiguity brought by the traditional analytical algorithm, a position solving method based on the Cosine law is presented in the general case of three-dimension target location by two platforms using AOA and TDOA measurements According to the relative geometrical relationship among reconnaissance platforms and the target in three-dimension space, and by utilizing the Cosine law, an unambiguous and analytical solution of the target position is given by the algorithm when the measurements of TDOA and AOA are both available. Further, to make full use of the redundant observed information obtained by platforms and improve the location precision, the target position estimates solved from different measurements are integrated by employing a simplified weighted least square algorithm (SWLS), then a practical data fusion algorithm for AOA/TDOA location is proposed. The effectiveness of the solving algorithms presented by this work is validated through numerical simulations.
出处
《现代雷达》
CSCD
北大核心
2015年第5期41-46,共6页
Modern Radar
