SYSTEM AND METHOD FOR ESTIMATING THE POSITION AND ORIENTATION OF A MOBILE COMMUNICATIONS DEVICE IN A BEACON-BASED POSITIONING SYSTEM

摘要

An example of a system including a plurality of lighting devices, each lighting device including a light source, a modulator and a processor. Each processor is configured to control the respective light source to emit light for general illumination and control the respective modulator to modulate the intensity of the emitted light to broadcast a respective signal modulated on the emitted light within a respective range of frequencies. A first lighting device and a second lighting device modulate emitted light within the same range of frequencies when the first lighting device is set at a distance from the second lighting device such that modulated light emitted by the first lighting device appears in a first portion of an image sensor of a mobile device and modulated light emitted by the second lighting device appears in a second portion of the image sensor separate from the first portion.

主权项

1. A system, comprising a plurality of lighting devices installed within a space, each lighting device comprising:
a light source; a modulator coupled to the light source; and a processor coupled to the modulator and configured to:
control the respective light source to emit visible light for general illumination within the space; andcontrol the respective modulator to modulate the intensity of visible light emitted by the respective light source based on a respective signal, the intensity of visible light modulated within a respective range of frequencies; wherein:
a first lighting device emits modulated visible light within a first range of frequencies;a second lighting device also emits modulated visible light within the first range of frequencies; andthe first lighting device is set relative to the second lighting device such that the modulated visible light emitted by the first lighting device appears on a first region of an image sensor of a mobile device and the modulated visible light emitted by the second lighting device appears on a second region of the image sensor separate and distinct from the second region of the image sensor.