摘要
针对室内可见光定位精度不高的问题,提出了一种基于接收信号强度与到达角度(RSS/AOA)信息混合的室内三维空间定位算法。该算法同时考虑距离信息和角度信息,利用最小二乘准则(LS),建立混合定位优化目标函数,导出定位节点位置信息的最小二乘估计量。对于目标函数为非凸情况,将目标函数转换成广义信赖域子问题(GTRS)的形式进行求解,可以获得全局最优解。数值仿真结果显示,在室内5 m×5 m×3 m的二维定位场景下,选取20×20个测试点,平均定位误差为8.7cm。此外,针对三维定位场景,对动态目标进行定位和追踪,结果表明该算法在水平方向和垂直方向均能获得较高的定位精度。
Aiming at the problem of low indoor visible light positioning accuracy, a positioning algorithm based on the received signal strength and arrival angle （RSS/AOA） information in indoor three-dimensional space is proposed. Based on the least squares （LS） criterion, the distance and angle are considered at the same time, a novel hybrid objective function is constructed, and then the least square estimator of location information is derived. For the non-convex objective function, the objective function is transformed into generalized trust region sub-problem （GTRS） to solve the global optimal solution. The simulation results show that in the 5 m × 5 m× 3 m two- dimensional positioning space, 20× 20 test points are selected, for which the average positioning error is 8.7 cm. In addition, it can realize dynamic positioning and tracking in the three-dimensional space. The results show that the algorithm can obtain high accuracy in horizontal and vertical directions.
作者
董文杰
王旭东
吴楠
Dong Wenjie;Wang Xudong;Wu Nan(Information Science Technology College, Dalian Maritime University, Dalian, Liaoning 116026, China)
出处
《激光与光电子学进展》
CSCD
北大核心
2018年第5期82-87,共6页
Laser & Optoelectronics Progress
基金
国家自然科学基金(61371091)
关键词
光通信
室内定位
接收信号强度
到达角度
广义信赖域子问题
optical communications
indoor positioning
received signal strength
angle of arrival
generalized trust region sub-problem
