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Signal transmission method, device and system

A transmission device and signal technology, which is applied in the field of optical communication, can solve problems affecting the stability of optical signals and achieve the effect of improving reliability

Active Publication Date: 2015-11-11
KUANG CHI INTELLIGENT PHOTONIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, signal transmission mainly uses white light or monochromatic light for optical signal transmission, however, using the same light for uplink and downlink transmission will affect the stability of the received optical signal

Method used

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  • Signal transmission method, device and system
  • Signal transmission method, device and system
  • Signal transmission method, device and system

Examples

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Embodiment 1

[0049] An embodiment of the present invention provides a visible light signal transmission method, figure 1 is a flowchart of a visible light signal transmission method according to an embodiment of the present invention, such as figure 1 As shown, the method includes the following steps:

[0050] Step S102, transmitting a visible light signal of a first color to a receiving device at an opposite end.

[0051] Step S104, receiving a visible light signal of a second color emitted from the transmitting device at the opposite end, wherein the second color is different from the first color.

[0052] In related technologies, when white light or monochromatic light is used for optical signal transmission in visible light communication, using visible light signals of the same color for uplink and downlink transmission will affect the stability of received visible light signals. For example, a visible light signal transmission device not only transmits white visible light signals up...

Embodiment 2

[0067] An embodiment of the present invention provides a visible light signal transmission device. figure 2 is a visible light signal transmission device according to an embodiment of the present invention, such as figure 2 As shown, the device includes: a transmitting device 202, configured to transmit the visible light signal of a first color to a receiving device at the opposite end; a receiving device 204, configured to receive the visible light signal of a second color from the transmitting device at the opposite end signal, wherein the second color is different from the first color. In application, the emitting devices of the downlink visible light signal transmission device and the uplink visible light signal transmission device respectively emit monochromatic light of different colors. The receiving device of the transmission device of the downlink visible light signal is sensitive to the monochromatic light emitted by the transmitter device of the transmission devi...

Embodiment 3

[0081] image 3 is a schematic structural diagram of a visible light signal transmission device according to a preferred embodiment 1 of the present invention, as shown in image 3 As shown, the device includes:

[0082] The encoder 2022 is configured to encode the input electrical signal, so as to suitably modulate a light emitting diode (Light Emitting Diode, LED for short).

[0083] The driver 2024 is used to amplify the encoded electrical signal to drive the LED at the rear end.

[0084] The red LED 304 is used to realize electro-optic conversion and emit red visible light signals. The red LED 304 is equivalent to the electro-optical converter 2026 in the second embodiment.

[0085] A blue light photodiode (Photo-Diode, referred to as PD) 306 is equivalent to the photoelectric converter 2042 in the second embodiment, and its response wavelength is within the blue visible light wavelength range, and is used to receive the blue visible light signal emitted by the opposite...

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Abstract

The invention provides a signal transmission method, apparatus, and system. The apparatus comprises: an emission device, which is used for emitting a first signal to a receiving device at an opposite end; and a receiving device, which is used for receiving a second signal emitted by the emission device at the opposite end. The frequency of the first signal is different from the frequency of the second signal; and the first signal and / or the second signal are / is at the visible light frequency band. According to the invention, a problem of poor stability of uplink and downlink signal transmission due to utilization of signals with the identical frequencies during uplink and downlink transmission according to the related technology can be solved; and thus the effect of reliability improvement of the uplink-downlink signal transmission can be realized.

Description

technical field [0001] The present invention relates to the field of optical communication, in particular to a signal transmission method, device and system. Background technique [0002] Visible light communication uses visible light for data transmission. Compared with microwave technology, it has quite rich spectrum resources, which is unmatched by general microwave communication and wireless communication. At the same time, visible light communication can be applied to any communication protocol and any environment. Moreover, the signal coverage of the wireless optical communication is easier to control, the communication content is not easy to be stolen, and has higher security. In addition, wireless optical communication devices are flexible, convenient, and low-cost, and are suitable for large-scale popular applications. [0003] At present, signal transmission mainly uses white light or monochromatic light for optical signal transmission, however, using the same li...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B10/116
Inventor 不公告发明人
Owner KUANG CHI INTELLIGENT PHOTONIC TECH
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