Beam domain network large-scale MIMO wireless optical communication system and communication method

Abstract

The invention provides a beam domain network large-scale MIMO wireless optical communication system and a communication method. The system comprises at least two light transmitting nodes and at leasttwo light receiving nodes, each light transmitting node comprises a light transmitting unit array and a transmitting lens, and each light receiving node comprises a light receiving unit array and a receiving lens. The method comprises the steps that light emitted by a single light transmitting unit forms a narrow beam through a sending lens, and a plurality of sending narrow beams in different directions are generated through the light sending unit array and the sending lens; the sending narrow beams in different directions are refracted to different light receiving units through the receivinglens to be received and detected; each optical sending node sends signals to different optical receiving nodes at the same time by using different wave beams, and each optical receiving node receivessending signals of a plurality of optical sending nodes at different positions at the same time by using different receiving wave beams. The number of transmission data streams can be remarkably increased, and the problem of communication interruption caused by shielding is solved.

Description

technical field [0001] The invention relates to a beam domain network massive MIMO wireless optical communication system and a communication method, belonging to the technical field of mobile communication. Background technique [0002] With the development of mobile communication, the demand for wireless transmission rate increases exponentially, but radio frequency spectrum resources are seriously in short supply. Wireless optical communication can provide additional bandwidth resources to achieve high-speed data transmission, and is a new type of wireless communication. Compared with radio frequency wireless communication, wireless optical communication can bring the following benefits: (1) wireless optical communication has very rich spectrum resources; (2) wireless optical communication cannot penetrate walls, so the indoor spatial multiplexing gain is high, and It has higher security; (3) transmits information by using optical signal strength to reduce the complexity ...

AI Technical Summary

Problems solved by technology

Therefore, the number of transmitted data streams is limited by the number of optical sending nodes and optical receiving nodes, the system and rate performance are limited, and there may be problems of communication interruption due to occlusion

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