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三维定位问题是现代商用通信网络中对于定位系统存在的一个真正具有技术难度的挑战.根据视距传播环境和非视距传播环境的到达时间的数据集,建立线性误差模型;对于无真实位置的竞赛数据集,定义竞赛数据定位误差评估模型;基于不同的空间场景,提出基于空间单元的定位算法;面对高度误差明显高于平面误差的问题,设计基于高斯加权的误差补偿模型;针对最优定位精度最少基站问题,提出基于贪心策略的基站选择算法;考虑轨迹连续性,设计轨迹准确性验证的10-fold交叉验证方法;基于测量距离有限的真实环境,分析平均“连接度数”与定位精度的关系.实验结果表明,提出的定位算法在有效基站数大于等于5时,能获得较好的定位精度.
The three-dimensional positioning problem is a truly technical challenge for positioning systems in modern commercial communication networks.A linear error model is built based on the data set of the time-of-arrival propagation environment and the non-line-of-sight propagation environment arrival time.For the non-true location Aiming at the problem that the height error is obviously higher than the plane error, the error compensation model based on Gaussian weighting is designed; for the optimal The base station selection algorithm based on greedy strategy is put forward. The 10-fold cross-validation method is proposed to verify the trajectory accuracy considering trajectory continuity. Based on the real environment with limited measurement distance, the average “connection degree” and Positioning accuracy.The experimental results show that the proposed positioning algorithm can obtain better positioning accuracy when the number of effective base stations is greater than or equal to 5.