Miniature DTV-VLC receiving terminal system

Abstract

The invention provides a miniature DTV-VLC receiving terminal system comprising a VLC receiving unit, a multimedia decoding unit and a main control unit, wherein the VLC receiving unit comprises a visible light receiving unit, a conversion circuit, a signal processing unit and a digital-to-analog conversion unit; the light receiving unit converts a received visible light signal into an electrical signal, and the electrical signal is transmitted to the multimedia decoding unit by a serial port; the main control unit controls the multimedia decoding unit to select a corresponding program frequency band to carry out a data decoding modulation process according to an instruction and finally transmits a digital television signal to a user terminal by a transmission interface for receiving; and a front end amplifier, a filter and an analog-digital converter are arranged between the visible light receiving unit and the multimedia decoding unit, the electrical signal converted by the light receiving unit is amplified by the front end amplifier and is performed with filtering denoising and analog-digital conversion to form a standard TTL level, and the standard TTL level is transmitted to the multimedia decoding unit. The miniature DTV-VLC receiving terminal system provided by the invention can reach very good receiving efficiency, and is portable, smart and easy to operate, thereby being suitable for wide promotion and use.

Description

[0001] [technical field] [0002] The present invention relates to the technical field of receiving terminal equipment in visible light communication, in particular to a miniaturized DTV-VLC receiving terminal system with high efficiency, miniaturization and low hardware complexity. [0003] [Background technique] [0004] Many existing wireless access technologies have revealed a lot of problems in the background of the demand for terrestrial digital TV signal access. Traditional WiFi technology is a common wireless network transmission and access technology, which has been widely used in various places. However, due to the tight spectrum, the communication capacity is limited, and in some areas with heavy traffic, it cannot meet the needs of people to watch high-definition videos at the same time. At the same time, WiFi cannot be applied in some places with electromagnetic shielding or electromagnetic interference. Since the signal is easy to pass through the wall, it is ea...

AI Technical Summary

Problems solved by technology

This requires implanting a PLC demodulation module (including the necessary DC power supply module) in the narrow lighting space, which will inevitably require large-scale transformation of existing lighting, which is complicated and difficult to be practical. For the uniformity of lighting, it is necessary to There are overlapping areas of lighting, and the more severe challenge faced by this type of system is: if the information sent between adjacent lights is different, there will inevitably be light interference other than natural light

[0006] Since visible light communication is very sensitive to occlusion, the movement of the user terminal will inevitably cause communication interruption due to factors such as body occlusion, and it is necessary to switch between LED lights frequently during the movement process

There are also extremely high requirements on the real-time performance of terminal equipment, network equipment, resource management and scheduling, etc., which is difficult to be practical

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