摘要
测量站的布站直接影响时差定位目标的定位精度。针对一定区域目标整体定位精度的优化,提出了一种三站时差定位的布站优化算法。以水平定位精度因子(HDOP)为定位精度的度量准则,建立布站优化问题的多目标规划数学模型,通过构造最小最大评价函数,求解模型的最优解,从而得到三站时差定位的最优布站。仿真给出了该布站优化算法对某种初始布站进行优化前后两种布站的HDOP分布图。由仿真结果可以看出,相对于初始布站,最优布站对目标区定位精度的提高较为明显,验证了这种布站优化算法的有效性。
Station layout has a direct impact on location precision for the tri-station TDOA （time difference of arrival） location system. In order to optimize the overall location precision of targets in certain area, an algorithm for station layout optimization is presented. HDOP （horizontal dilution of precision） is regarded as the measurement rule of location precision. Then the multi-object programming mathematical model of station layout optimization is built. The optimal solution is searched by constructing minmax evaluation function. Consequently, the optimal layout of stations is obtained. The simulation provides the HDOP distribution of two station layouts, One is the initial station layout, and the other is the optimal station layout. The simulation results show that for the optimal station layout, the effect of improving the location precision is obvious, and also indicate the validity of this algorithm.
出处
《电讯技术》
北大核心
2010年第5期18-22,共5页
Telecommunication Engineering
关键词
三站时差定位
多目标规划
布站优化
评价函数
tri-station TDOA location
multi-object programming
station layout optimization
evaluation function
