White light LED communication indoor positioning system and method

Abstract

The invention discloses a white light LED communication indoor positioning system and method. The system comprises a transmitting center control platform, multiple groups of transmitters, a receiver and a background resolving platform. According to the positioning method, a technology of calculating distance through time division and optimization of optical transmission length of time is employed. The transmitting center control platform transmits time division messages to different transmitters through a power carrier technology; the transmitters modulate messages into direct current pulse signals and couple the direct current pulse signals with an LED drive reference power supply to drive LED lights to transmit optical signals; the receiver obtains information such as the transmission length of time and strength of the optical signals and transmits the information to the background resolving platform; and the background resolving platform resolves a coordinate position of the receiver through adoption of an optimization integration algorithm and a feedback closed loop self-adaptive calibration system and loads the coordinate position on a map, thereby realizing positioning. The system is high in positioning precision, low in cost and simple and convenient in operation and is easy to commercialize.

Description

technical field [0001] The invention belongs to the technical field of indoor positioning, and in particular relates to a white light LED communication indoor positioning system and method. Background technique [0002] The GPS technology of the Global Positioning System receives very weak signals inside buildings and densely populated cities, and is only suitable for outdoor positioning and navigation. Most of the current indoor positioning and navigation technologies use radio frequency methods, such as RFID, Bluetooth, Wi-Fi, infrared, ultrasonic and other methods. [0003] RFID positioning technology uses the transmission characteristics of inductance, electromagnetic coupling and radar reflection to identify specific targets and read and write related data through radio signals. RFID indoor positioning system usually consists of electronic tags, radio frequency readers, middleware and computer databases. Its advantages are high versatility, fast speed, small antenna an...

AI Technical Summary

Problems solved by technology

The advantage is that the system is simple and the indoor positioning accuracy is high; the disadvantage is that it requires a lot of equipment and hardware, the cost is high, it is seriously affected by non-line-of-sight and multipath effects, and its application range is limited

[0008] Due to the common problems of these radio frequency technologies such as being easily interfered by other radio frequency signals, poor stability, low positioning accuracy, short positioning distance, and serious overlapping of wireless communication spectrum resources, they are not suitable for positioning in complex indoor environments.

Images