Thus, if we have at least 4 repeaters at known locations then we can calculate the indoor user position, Proceedings of the 16th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS/GNSS 2003), Bu, S-C., Choi, J-H., Jee, G-I., Kim, H.S., "An Indoor Positioning Using GPS Repeater,". Indoor localization systems are now increasingly needed in supporting location-based services (LBS). Indoor positioning systems (IPS) can most easily be explained as GPS for indoor locations. Several repeaters can be installed depending on how big the building is. ROGER GALILEO/GPS/GLONASS/BEIDOU repeater operates by receiving satellite signals with an antenna located outside the building and re-radiating the signals to the indoor area or covered space. Jee, H.S. Finally, the new system thus obtained is discussed for a typical indoor environment such as a conference room. Another option would be an indoor positioning system that acts as a GPS for an indoor environment or even an indoor navigation system. How Does it Work? GPS or GNSS repeaters consist of three components: an active outdoor GPS antenna, typically mounted on the roof of a building to pick up signals, a repeater unit with a built-in passive antenna used to re-transmit the GPS signal indoors, and a coaxial cable that connects the two. A GPS repeater relays live GPS signal from the outside of the building to the inside. Abstract: In this paper we propose a new method to deal with GPS indoor positioning by means of GPS signal re-radiator or repeater. A large variety of techniques and devices are used to provide indoor positioning ranging from reconfigured devices already deployed such as smartphones, … It is all about saving time. If the use of GNSS repeater is allowed for certain indoor environments under RF radiation regulations, switching and/or delaying GNSS signals enables indoor positioning, without any new PN code and signal generator as with pseudolites. GPS Repeaters GPS repeaters are applied to bring a GNSS signal coverage indoor. Global Foxcom’s GNSS repeater solution is the ideal solution for re-transmitting GNSS signals indoors. We carry out a theoretical study of an indoor positioning technique based on sequential switching. It uses available global positioning System (GPS) signals and simple deployment of so-called "GPS repeaters." Both theoretical and technical aspects of the realisation of our DOA antenna are described, together with details of the processing required to calculate the various angles. Therefore the resulting user position is the same as that of the reference antenna. Previous papers have described the way it is possible to achieve indoor positioning using such repeaters, the theory states that four repeaters are required in order to calculate a 3-D location. $\endgroup$ – jasonharper Apr 2 '19 at 13:19 The METRO-G is a GNSS smart amplifier, perfect for the commercial and public sector. Of course, there are a few technical issues to be addressed prior to implementing this ideal system. ROGEr GNSS signal splitters and amplifiers it is easy to extend distance from an antenna or add more repeaters to extend indoor coverage in a building. The indoor GPS Repeater unit amplifies the received GPS signals and re-radiates the signals so that all GPS equipment inside the hangar can get enough GPS signals for functional testing. This paper makes a complete analysis of the underlying theory and gives the details of the implemented solution, namely two repeaters and a DOA antenna at the receiver's end. The repeater system provides seamless coverage inside a hangar enabling the testing of aircraft navigational systems without the need to move the aircraft out of the hangar. Previous works have shown the feasibility of such antennas, but not yet at the mobile terminal end. Then the experimental set-up and results are presented. Finally, the new system thus obtained is discussed for a typical indoor environment such as a conference room. Tri-M GPS repeaters are easily installed, no-maintenance plug-and-play systems that bring a live GPS signal inside your building. Each repeater retransmits the GPS signals continuously to the indoor receivers without sequential switching. In this case, taking into account that the DOA antenna is able to give the two directions of arrival (from the two repeaters), the constraint on the mobile attitude determination is much less. 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