【摘要】 针对室内一般GPS接收机不能正确接收GPS信号的问题，该文提出了利用信号模拟技术产生虚拟卫星星座信号的系统，来实现室内定位。虚拟卫星在保持各卫星起点位置不变时，使不同时刻的卫星组成同一时刻的新星座构型。该虚拟星座与真实星座比较，减小了室内定位中由于卫星、室内天线和用户三点不成直线而产生的折线误差。开发了室内四通道卫星信号模拟器，播发了实验信号。接收机定位结果误差为米级，符合GPS精度要求。更多还原

【Abstract】 To address the problem that indoor general GPS receivers cannot receive GPS signals correctly,this paper proposes a system that uses signal simulation techniques to generate virtual satellite constellation signals,so as to achieve indoor positioning.Virtual satellites allow satellites at different moments to form a new constellation configuration at the same moment,while keeping the starting position of the satellite unchanged.Compared with the real constellation,the virtual satellite constellation reduces the broken line error in indoor positioning due to the non-linearity of the satellite,indoor antenna and user.An indoor four-channel satellite signal simulator was developed and a comparative experimental signal was broadcast.The receiver positioning test result has an error of meter level,meeting the GPS positioning accuracy requirements.更多还原