Visible light communication method and visible light communication system based on pulse amplitude regulation
A technology of visible light communication and pulse amplitude, applied in the field of visible light communication, can solve the problems of increasing the complexity of the visible light communication system, achieve the effect of improving quality and data transmission rate, simplifying complexity, improving quality and channel capacity
Active Publication Date: 2017-12-01
SOUTH CHINA UNIV OF TECH
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Problems solved by technology
However, it greatly increases the complexity of the visible light communication system
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[0035] Such as figure 1 As shown, a visible light communication system based on pulse amplitude modulation includes: a transmitting subsystem, a transmitting subsystem, and a receiving subsystem. In the transmitting subsystem, the camera receives the real-time video signal and transmits it to the first liquid crystal display through the first programmable gate array, displays the original video signal, and transmits it to the LED drive circuit through modulation and corresponding video signal processing technology, Through the capacitor and inductance of the Bias Tee module in the LED drive circuit, the DC signal and the AC signal are coupled to ensure that the signal will not be lost in the COB packaged LED lamp, such as Figure 2a and Figure 2b Shown is a schematic diagram of a COB packaged LED lamp and LED drive circuit. The COB packaged LED lamp is a 4×4 LED array, and 16 chips are packaged on the PCB circuit board through COB package technology.
[0036] After the video...
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The invention discloses a visible light communication method based on pulse amplitude control, comprising the following steps: 1. The first programmable gate array converts the video signal sent by the signal source into an n-bit binary digital signal; 2. The first programmable gate array Convert each group of n-bit binary digital signals into n2-ary digital signals; 3. The receiving subsystem senses n2-level light intensity changes through photoelectric detection devices to generate n2-level pulse electrical signals, which are demodulated by the receiving subsystem After processing, the original signal is restored; the present invention also discloses a visible light communication system implementing a visible light communication method based on pulse amplitude regulation, including: a transmitting subsystem, a transmitting subsystem and a receiving subsystem. It has the advantages of doubling the quality and data transmission rate of wireless communication without increasing the bandwidth of the device, and has broad application prospects.
Description
technical field [0001] The present invention relates to visible light communication technology, in particular to a visible light communication method based on pulse amplitude regulation and a visible light communication system thereof. The present invention is a pulse amplitude modulation technology and a method for realizing data transmission and reception. Background technique [0002] In recent years, semiconductor lighting technology known as "green lighting" has developed rapidly. Compared with traditional lighting sources such as incandescent lamps, LEDs have the advantages of low power consumption, long life, small size, and environmental protection. At the same time, LED has the advantages of good modulation performance and high response sensitivity. The signal is loaded on the LED with a high frequency that cannot be recognized by the human eye for transmission, and then a technology that can realize the integration of lighting and communication - visible light com...
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IPC IPC(8): H04B10/116H04B10/524
Inventor 文尚胜宋鹏程关伟鹏陈颖聪张恒
Owner SOUTH CHINA UNIV OF TECH