Synthesis of an algorithm for synchronization of time scales of local navigation system using ultrawideband signals and global navigation satellite system

Today, position-based local navigation systems (LNS) are widespread, which solve a number of practical problems, such as employee monitoring at enterprises, coordinate support of UAVs in indoor and outdoor areas. However, the problem with such systems is that when the consumer goes outside the work area, the system is unable to provide the specified accuracy of coordinate determinations. As a solution to this problem, it is possible to propose the provision of “seamless” navigation using the integration of LNS with the receiver global navigation satellite system (GNSS). It should be noted that there are very few existing solutions and they do not affect the hardware part of the devices, but work with ready-made measurements from GNSS receiver and LNS. The method of synchronization of GNSS receiver time scales and the reference radio-navigation point of the local navigation system was developed in this paper. The authors have synthesized an algorithm for estimation of time scale offset. The proposed method of scale synchronization allows to provide “seamless” navigation and joint processing of measurements of the LNS radio navigation reference point and GNSS receiver.