Beam domain light wireless communication method and system

Abstract

The invention discloses a beam domain light wireless communication method and system. A base station is equipped with a port array for light sending or receiving or simultaneous sending and receivingand a lens, wherein each light sending / receiving port forms a beam with centralized energy through the lens; the base station generates the beams in different directions by using the light sending / receiving port array and the lens, thereby realizing the multi-beam coverage or large-scale beam coverage in a communication region; the base station sends / receives signals of multiple or a large numberof user terminals by using the channel state information of various user terminals, different light sending / receiving ports send / receive the signal in different directions, thereby realizing the simultaneous communication and bidirectional communication between the base station and different user terminals. By using the wireless communication method disclosed by the invention, the limitation on the communication user terminal number by the light sending unit array number and the restriction of the one-directional communication are relieved, the space resource is sufficiently utilized, the spectrum efficiency, the power efficiency and the system capacity are greatly improved, the light wireless communication capability with huge capacity is provided; the wireless communication method disclosed by the invention can be used for constructing a cellular light wireless communication system with huge capacity hotspot coverage and wide area coverage.

Description

technical field [0001] The invention belongs to the field of optical antenna communication, and in particular relates to a beam domain optical wireless communication method and system. Background technique [0002] Optical wireless communication is a new type of wireless communication that has received widespread attention in recent years. The base station or sending device uses an optical sending unit, such as a light-emitting diode (LED), to load the data to be transmitted on the optical signal for transmission, and the user terminal or receiving The device uses a light receiving unit, such as a photodiode, to receive light signals to obtain information. Compared with traditional radio frequency wireless communication methods, optical wireless communication has the advantages of green environmental protection, no electromagnetic interference, energy saving, wide light source bandwidth, simple communication network, and high security. At the same time, optical wireless comm...

AI Technical Summary

Problems solved by technology

However, the number of optical transmission unit arrays restricts the number of users served at the same time, which is the bottleneck for further improvement of system performance

On the other hand, existing solutions can only adapt to one-way communication, but practical applications require two-way communication and two-way information interaction capabilities

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