Single-lamp visible light duplex communication system, and uplink and downlink time division method thereof

A duplex communication and visible light technology, applied in the field of visible light communication, can solve the problems of visible light eye irritation, non-compliance with the design concept of green environmental protection, increased power consumption and cost of equipment, etc., to solve the problem of tight spectrum resources and good ergonomic design , the effect of saving light source
CN106533561AInactive Publication Date: 2017-03-22HEBEI NORMAL UNIV
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Patent Information

Authority / Receiving Office
CN Β· China
Current Assignee / Owner
HEBEI NORMAL UNIV
Publication Date
2017-03-22
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

The invention discloses a single-lamp visible light duplex communication system, and an uplink and downlink time division method thereof. The communication system comprises an upper computer and a lower computer; the upper computer comprises a first signal processing unit, a first optical signal transmitting unit and a first optical signal detection unit; and the lower computer comprises a single-wafer type external modulator, a reflective prism set, a second optical signal detection unit, a second signal processing unit, an external modulation driving module and a control terminal. The method for realizing uplink and downlink time division comprises the following steps of: setting uplink data and downlink data, and, according to time division, distinguishing an uplink data channel from a downlink data channel, and performing self-adaptive distribution. By means of the single-lamp visible light duplex communication system, and the uplink and downlink time division method thereof disclosed by the invention, the light source of the lower computer can be saved; light cannot irritate eyes of users; the data transmission rate is high; and the scientific research value, the economic benefit and the social benefit are relatively high.
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Description

technical field

[0001] The invention belongs to the technical field of visible light communication, and in particular relates to a single-lamp visible light duplex communication system and an uplink and downlink time division method thereof. Background technique

[0002] Visible light communication technology is an emerging broadband access technology. It mainly uses high-power white light LED as the light source, and loads the communication signal to the light-emitting white light LED, so that the change of the signal becomes the change of light and is emitted. In the past, the visible light communication duplex system required two sets of light sources for the transceiver system. The upper computer had a light source as the transmitter light source, and a photodetector as the receiver optical signal detection device; the lower computer had a light source as the transmitter light source, and a photodetector As a receiver optical signal detection device. There is a common ...

Claims

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