基于多阵元的室内导航伪卫星系统设计

Design of Indoor Navigation Pseudo Satellite System Based on Multi-Array

针对伪卫星定位过程中的时钟同步以及整周模糊度求解问题提出了一种基于多阵元的同源伪卫星系统;系统采用固定导航电文参数设计的伪卫星脉冲信号体制,实现了伪卫星信号与卫星信号在商用接收机端的兼容,为伪卫星室内定位的推广与普及提供了基础;同时提出一种应用于该伪卫星系统的载波相位单差定位方法,由于其采用同源时钟,不存在信号间时钟偏差问题,仅需利用载波相位单差消除伪卫星与接收机间的钟差,即可建立载波相位单差方程实现定位解算,减低了算法复杂度;最后搭建伪卫星平台,实现了伪卫星信号的生成与接收,并对伪卫星的信号质量以及接收机端观测数据进行了分析,验证了该伪卫星系统信号设计及定位方法的可行性,对实际工程应用具有一定的借鉴意义。

A homogenous pseudo-satellite system based on multiarray is proposed for clock synchronization and whole-circumference ambiguity in pseudolite positioning.The pseudo-satellite pulse signal system designed by fixed navigation message parameters is used to realize the compatibility of pseudo-satellite signals and satellite signals at the commercial receiver end,which provides a basis for the promotion and popularization of pseudo-satellite indoor positioning.At the same time,a carrier phase single-difference positioning method applied to the pseudo-satellite system is proposed.Since the homologous clock is used,there is no clock skew between signals,and only the carrier phase single difference is needed to eliminate the clock difference between the pseudo-satellite and the receiver.Then,the carrier phase single difference equation can be established to realize the positioning solution,which reduces the complexity of the algorithm.Finally,the pseudo-satellite platform is built to realize the generation and reception of pseudo-satellite signals.The signal quality of the pseudo-satellite and the observation data of the receiver are analyzed.The feasibility of the signal design and positioning method of the pseudo-satellite system is verified.Engineering applications have certain reference significance.