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In order to propose a solution for the indoor positioning question, several tests with the repealite-based (similar to Pseudolites and repeaters) system have been carried out. This system uses a single Global Navigation Satellite System signal transmitted by all the indoor antennas. These signals may interfere with the satellite ones outdoors. Hence, the noise level at the outdoor receiver will be...
In order to achieve indoor positioning, and hence a real continuity of the positioning service in all environments, we designed a new pseudolite-based system using the so-called repealites. A single GNSS-like signal is transmitted from all the repealites (typically 4 for 3D positioning): this approach simplifies both the synchronization process (between transmitters) and the indoor interference between...
In order to extend the GNSS coverage to indoor environments, several systems have been proposed for indoor positioning. Among them, those using local GNSS-like signal transmitters are of specific interest since they could allow a single device, the GNSS receiver, to achieve the continuity of the positioning service from outdoors to indoors. Since these local antennas broadcast GNSS signals similar...
In order to improve the potential accuracy of our indoor positioning system, previously based on repeaters, we have moved for a few years to the so called “repealite system”. The main idea is to be able to carry out carrier phase measurements: one knows that these Doppler based values are usually much more accurate and less sensitive to multipath than code based approaches. Thus, the current system...
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