Signal receiving and transmitting device and communication method thereof

Abstract

The invention discloses a signal receiving and transmitting device and a communication method thereof. The signal receiving and transmitting device comprises a plurality of signal level converters, a parallel / serial converter, a coding / decoding device, a modulation / demodulation device and a photoelectric converter, wherein the plurality of signal level converters convert RS232 level signals into transistor-transistor logic (TTL) / complementary metal oxide semiconductor (COMS) level signals and transmit the COMS level signals to a central processing unit (CPU) to perform data coding and modulation; the parallel / serial converter is used for converting a plurality of level signals into one information stream in the transmitting process of the data and converting one information stream into the plurality of level signals in the receiving process; the coding / decoding device is used for coding one information stream into a plurality of code blocks in the transmitting process and decoding the plurality of code blocks into one information stream in the receiving process; the modulation / demodulation device is used for modulating the plurality of code blocks into a plurality of high-order modulation symbols or demodulating the plurality of high-order modulation symbols into the plurality of code blocks; and the photoelectric converter is used for converting the high-order modulation symbols into optical signals and then transmitting the optical signals. By means of the signal receiving and transmitting device and the communication method of the signal receiving and transmitting device, long-distance optical fiber communication among universal asynchronous receivers / transmitters (UARTs) can be achieved, antijamming capability is enhanced, and communication quality is improved.

Description

technical field [0001] The present invention relates to a signal receiving and sending device and a communication method thereof, in particular to a signal receiving and sending device capable of realizing long-distance optical fiber communication between UART (Universal Asynchronous Receiver / Transmitter, ie Universal Asynchronous Receiver / Transmitter) ports and its method of communication. Background technique [0002] With the continuous development of the industrial field, the interconnection of equipment and the requirements for data transmission are getting higher and higher, the transmission distance is getting longer and the amount of data transmission is getting larger and larger. Ordinary UART is transmitted through cables, the transmission distance is short, the cost is high, and it is easily disturbed by the external environment, which cannot guarantee the timeliness and accuracy of data. [0003] The signals transmitted by UART are generally RS232 / RS422 / RS485 le...

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is to provide a signal receiving and transmitting device and a communication method for realizing long-distance optical fiber communication between UART ports in order to overcome the defect that the prior art cannot simultaneously transmit multiple UART signals at high speed and long distance

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