Automotive R&D center - GPS signal inside the building

A GPS re-radiating network in an automotive research and development center - from 0-1 satellites and no fix to a fix with 44 of 54 satellites and 9.9 m accuracy indoors, with a donor antenna on the roof terrace and distribution from the basement to the upper floors.

Passive 4-way GPS splitter mounted on the cable route, with N connectors — Automotive R&D center - GPS signal inside the building Swipe for info →

Rooftop mast with the GPS donor antenna mounted on an arm, against the sky — The donor antenna on the roof terrace - the GPS signal received here is distributed and re-radiated inside the building.

Label of a GPS re-radiating amplifier with 0-26 dB variable gain, held in hand during installation — GPS re-radiating amplifier with 0-26 dB variable gain (GPS Networking, made in the USA) - the level of each zone is adjusted individually.

GPS signal-level map on an office floor plan, with the antenna positions — The radio coverage map on an office floor: each antenna provides coverage for its specific zones, ensuring the levels needed for GPS reception.

GPS re-radiating antenna mounted on the suspended ceiling of an open-space office — Specialized antennas with circular polarization, mounted on the suspended ceiling in the areas of interest for the end client, re-radiate the signal.

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In brief

At an automotive research and development center, the engineers who develop and test GPS-equipped devices did not have enough signal to test their equipment: indoors, receivers generally saw 0-1 satellites, with no fix. Claritech built a GPS re-radiating network across the floors occupied by the client: a donor antenna on the roof terrace, a distribution rack serving the basement and the upper floors, re-radiating amplifiers with 0-26 dB variable gain, amplified 8-way splitters (18 dB) and discreet antennas in the office ceilings. At commissioning, indoor measurements showed a fix with 44 of 54 satellites visible and an accuracy of 9.9 m, with similar values at every test point. Indoor GPS re-radiation was implemented based on a radio design with a simulated coverage map, with before/after measurements in each zone.

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