Visible light communication subcarrier multiplexing clock synchronization receiving device

Abstract

The invention discloses a visible light communication subcarrier multiplexing clock synchronization receiving device. The visible light communication subcarrier multiplexing clock synchronization receiving device comprises a photoelectric detector and a de-multiplexer which are electrically connected in sequence, wherein the de-multiplexer is electrically connected with a clock generator and a decoder respectively; the clock generator is electrically connected with the decoder; the photoelectric detector is used for converting an optical carrier signal from a transmitting end into a multiplexed subcarrier signal; the de-multiplexer is used for separating the multiplexed subcarrier signal into a plurality of subcarrier signals; the clock generator is used for recovering the subcarrier signals into a local clock signal; and the decoder is used for decoding the subcarrier signals and outputting data. Through adoption of the visible light communication subcarrier multiplexing clock synchronization receiving device, the problem that sufficient voltage jump cannot be supplied to recover a clock or phase jitter occurs in the recovered clock under the influence of an amplitude noise since a clock mark is combined with the data is solved, and the clock and the data still keep the same synchronization stability with the transmitting end. The device is simple in structure, and has high communication reliability.

Description

technical field [0001] The present invention relates to the field of visible light communication, in particular to a visible light communication subcarrier multiplexing clock synchronization receiving device. Background technique [0002] LED has good modulability, and LED can be used to transmit information by high-speed bright and dark flickering, so that LED light source has communication capability. As a communication system, the clock at the receiving end must be consistent with that at the transmitting end in order to recover data accurately. Since the visible light communication system has only one physical channel, the clock cannot be sent separately, so a method of recovering the clock at the receiving end is required. A common method of recovering the clock at the receiving end is to transmit an obvious clock mark to the receiving end at the sending end. This time mark is included in the data packet, and a voltage jump for clock recovery is generated during the enc...

AI Technical Summary

Problems solved by technology

The device of the present invention solves the problem that the combination of the clock mark and the data, under the influence of amplitude noise, cannot provide enough voltage jumps for recovering the clock, or the recovered clock will have phase jitter, so that the clock and data It still maintains the same synchronization stability as the transmitter, and the device of the present invention has a simple structure and high communication reliability

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