摘要
室内场所因建筑物的遮挡,卫星导航设备无法接收导航信号而失去定位能力,伪卫星可以通过发射类似导航信号的方式独立进行定位。针对伪卫星信号在室内传播面临的功率衰减、多径衰落等问题,该文在经典室内通信模型的研究基础上,分析了伪卫星信号室内传播的应用环境和约束条件,建立了伪卫星信号室内传输的信道模型,并对伪卫星信号功率以及路径损耗、多径传播模型进行了计算仿真。仿真结果表明,对数距离路径损耗模型及莱斯分布多径模型可准确描述室内伪卫星信号的传输特点。
Due to the obstruction of the indoor structure,the GNSS receiver can not receive the navigation signals and thus loses locating capability,pseudolites can realize location alone by transmitting similar GNSS signals.Aiming at solving the problem like power attenuation and multipath fading in pseudolite propagation,based on the previous research on indoor communication model and detailed analysis of application environment and constraint condition,a indoor signal propagation model was proposed.Simulation analysis of the pseudolite signal power and path loss was performed,the simulation results showed that the log-distance path loss model and the Rice multipath model could describe the characteristics of pseudolite signal accurately.
出处
《测绘科学》
CSCD
北大核心
2015年第12期116-120,共5页
Science of Surveying and Mapping
关键词
伪卫星
室内定位
传播模型
信号体制
pseudolite
indoor position
propagation model
signal system
