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...

Examples

Embodiment

[0021] Example: such as figure 1 As shown, a visible light communication subcarrier multiplexing clock synchronization receiving device includes a photodetector 3 and a demultiplexer 5 electrically connected to each other, and the demultiplexer 5 is electrically connected to a clock generator 8 and a decoder 10 respectively. , the clock generator 8 is electrically connected to the decoder 10, the photodetector 3 is used to convert the optical carrier signal from the transmitting end into a multiplexed subcarrier signal, and the demultiplexer 5 is used to multiplex The sub-carrier signal is separated into multiple sub-carrier signals, the clock generator 8 is used to restore the sub-carrier signal to a local clock signal, and the decoder 10 is used to decode the sub-carrier signal and output data.

[0022] This embodiment also includes a filter device 2, which is used to filter stray light in the optical carrier signal 1 from the transmitting end, and improve the signal-to-nois...

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...

Examples

Embodiment

[0021] Example: such as figure 1 As shown, a visible light communication subcarrier multiplexing clock synchronization receiving device includes a photodetector 3 and a demultiplexer 5 electrically connected to each other, and the demultiplexer 5 is electrically connected to a clock generator 8 and a decoder 10 respectively. , the clock generator 8 is electrically connected to the decoder 10, the photodetector 3 is used to convert the optical carrier signal from the transmitting end into a multiplexed subcarrier signal, and the demultiplexer 5 is used to multiplex The sub-carrier signal is separated into multiple sub-carrier signals, the clock generator 8 is used to restore the sub-carrier signal to a local clock signal, and the decoder 10 is used to decode the sub-carrier signal and output data.

[0022] This embodiment also includes a filter device 2, which is used to filter stray light in the optical carrier signal 1 from the transmitting end, and improve the signal-to-nois...

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