基于半参数思想的手机测距信息高精度融合定位方法：以北斗和WiFi-RTT为例

智能手机是实现大众高精度位置服务的最重要载体。利用智能手机实现高精度定位，除了面临测距信息精度差之外，还存在“系统误差不稳定、噪声分布非高斯、功耗要求极苛刻”等共性问题。针对此，本项目首先深入研究手机测距信息中特殊系统误差的产生机理与变化机制；在此基础上，提出基于半参数回归思想的智能手机高精度定位数据处理方法，通过实现观测模型与随机模型之间的自适应平衡，同步解决手机数据“系统误差不稳定”与“噪声分布非高斯”的问题；进而，提出半参数回归思想下的必要参数最简化方法，设计高精度定位的低功耗处理策略，突破手机对“功耗要求极苛刻”的应用障碍。最后，以北斗和WiFi-RTT为例开展测试验证，实现手机动态亚米级高精度定位。本项目是申请人已有研究工作的延续和拓展，研究成果可进一步丰富手机高精度定位理论与方法，并为手机芯片级低功耗高精度定位提供技术支撑，亦可推动北斗PPP-B2b服务落地手机实现泛在应用。

Smartphone is the most important terminal for the realization of mass-market high-precision location-based services. In addition to the poor accuracy of ranging observations, there are also some common problems in using smartphones to achieve high-precision positioning, such as unstable systematic errors, non-Gaussian distribution noise, and strict power-consumption limitation. In view of this, the generation mechanism and variation characteristics of special systematic errors in smartphone ranging observations will be first investigated thoroughly. Then, a precise positioning method for smartphone is proposed based on the semiparametric regression idea. By realizing the adaptive balance between the observation model and stochastic model, the problems of unstable systematic errors and non-Gaussian distribution noise of smartphone data are solved simultaneously. To break through the application barrier of strict power-consumption limitation for smartphones, the most simplified method of essential parameters is proposed under the idea of semiparametric regression, and a low-power-consumption processing strategy for high-precision positioning is designed accordingly. Finally, the BDS and WiFi-RTT are taken as examples to realize the sub-meter-level fusion positioning in kinematic mode in smartphones. This project is the continuation and expansion of the applicant's recent research works. The outcomes of relevance can not only further enrich the theory and method of high-precision positioning with smartphones, but also provide technical supports for the implementation of low-power-consumption high-precision positioning on smartphone chip and promote the ubiquitous application of BDS PPP-B2b service in smartphones effectively.