Investigation of Visible Light Communication for Indoor Localization

This research investigates the use of Code Division Multiple Access (CDMA) in a Visible Light Positioning (VLP) solution. The system does not require a backbone network where all LEDs broadcast information in a non-synchronized way to a mobile device. This should limit the installation time and cost in order to facilitate implementation in current lighting installations. From the auto-correlation peak value, the received optical power is calculated which is used by the position algorithm. Due to the asynchronous system, the auto-correlation peak will randomly interfere with the cross-correlation of other codes (Multiple Access Interference (MAI)). This can cause positioning errors and synchronization problems. Results show positioning errors around tens of centimeters which should be sufficient for several Location Based Services (LBS).status: publishe