平台侧位置指纹定位系统中接收端问题的优化

Optimization of Receiver-concerned Problems in Location Fingerprint Positioning System on Platform Side

当前室内位置指纹定位系统主要用于对移动端的定位。借鉴其定位机理,研究了对无线电发射端的定位,属于平台侧位置指纹定位系统。从部署接收端的位置以减小定位误差的角度出发,提出了增大参考点之间欧式距离确定接收端位置的方案。同时,提出利用覆盖率的概念确定定位区间的接收端个数以满足区间定位的需求。建立了接收端位置及个数优化问题的数学模型,并用遗传算法和全覆盖原则对优化问题进行求解,给出了优化问题的实现流程。针对不同空间,对优化问题进行了仿真,比较了经验布置接收端和优化布置接收端的定位结果误差及接收端是否满足全覆盖的定位结果误差,验证了所提方法的合理性,对定位前部署接收端的个数和位置有一定的指导意义。

Current indoor location fingerprint positioning system is mainly used to the mobile terminal posi-tioning. Based on above system＆#39;s mechanism,this paper studies the positioning of radio transmitter,which belongs to location fingerprint positioning system on platform side. In order to reduce the positioning error through arranging the receivers＆#39; positions,a scheme of determining the receivers＆#39; positions is proposed with increasing the Euclidean distance between neighboring reference points. At the same time,the number of the receivers is set by the coverage in area of positioning to meet the demand of location. Then the mathe-matical model about the position and number optimization problem of the receiver is established. Genetic algorithm and full coverage principle are used to solve the optimization problem,and the realization process of the optimization problem is given. Simulation researches are carried out for different space to compare the positioning errors between the experience placement of the receiver and optimal placement of the re-ceiver as well as whether the receiver is satisfied with the full coverage. The simulation results show that the proposed method is reasonable. And this method provides some guidance for deploying the number and location of receivers before positioning.