分布式单星转发的定位测速模型及其应用

在城市峡谷中通过接收导航卫星信号以实现连续的定位与测速一直是卫星导航应用中的一个难题。针对此问题,借鉴卫星导航对抗中转发式欺骗干扰的定位控制基本原理,提出了通过分布式单星转发来解决城市峡谷中实现连续卫星导航的新方法,并构建了分布式单星转发的定位测速模型。在此基础上详细讨论了转发器天线对被遮挡卫星的指向跟踪、转发器相关参数的获取、转发器收发之间的有效隔离、直达信号与转发信号的同时利用等应用性问题。所提出方法的可行性得到了仿真试验的有效验证,从而为城市峡谷中的卫星导航应用提供了新的参考。

Positioning and Velocity Measurement Model for Distributed Single Satellite Signal Repeating and Its Application

In urban canyons, continuous satellite positioning and velocity measurement have always been difficult in satellite navigation applications. Based on the positioning control principle of repeater spoofing in satellite navigation countermeasure, the continuous satellite navigation in urban canyons is realized by distributed single satellite signal repeating and its positioning and velocity measurement model is established. Application measures are discussed in detail, such as the pointing and tracking of the repeater antenna to the occluded satellite, parameters acquisition about repeaters, effective isolation between repeater transceivers, and simultaneous utilization of direct path signals and repeating ones. The feasibility of the proposed method is verified by simulation experiments. It provides a new reference for satellite navigation used in urban canyons.