Single-channel dual-signal real-time transmission method and system

Abstract

The invention discloses a single-channel dual-signal real-time transmission method and system. The method includes the following steps of sampling the first signal to be transmitted and the second signal to be transmitted; at the same sampling point, performing the PFM modulation on the first signal to determine the real-time frequency of the transmission signal in the single channel, and then after the real-time frequency of the transmission signal is determined, performing the PWM modulation on the sampling voltage of the second signal to determine the real-time duty ratio of the transmission signal in the single channel; and when the signal is demodulated, performing the PFM demodulation on the transmission signal to obtain the sampling voltage of the corresponding first signal, and then performing the PWM demodulation on the transmission signal to obtain the sampling voltage of the corresponding second signal. The system is simple in structure and can realize the real-time transmission of the two signals in the signal channel, and the utilization rate is high.

Description

technical field [0001] The invention relates to the technical field of communications, in particular to a single-channel dual-signal real-time transmission method and system. Background technique [0002] A channel, also known as a channel or a channel, is a channel for signal transmission in a communication system, and is composed of the transmission medium through which the signal passes from the transmitter to the receiver. Existing channels can only transmit one signal at the same time. In the existing literature, the simultaneous transmission of two signals usually adopts frequency mixing or FM and AM superposition, and the receiving end adopts filtering or frequency discrimination to demodulate. In this type of method, the transmission distance of scattered light is very short, and the transmission power needs to be high; using LEDs with different wavelengths and corresponding light sensors to receive them will increase the complexity of the system and waste raw materi...

AI Technical Summary

Problems solved by technology

However, it is easy to interfere with the signals of each channel, and the line utilization rate is low

[0004] Secondly, optical fiber communication uses wavelength division multiplexing to realize dual signal transmission, that is, two or more optical carrier signals of different wavelengths are combined at the sending end through a multiplexer, and coupled to the same optical fiber of the optical line for transmission. Technology; at the receiving end, the optical carriers of various wavelengths are separated by the demultiplexer, and then further processed by the optical receiver to restore the original signal, but the equipment is expensive and the technology is complicated

[0005] Both of the above two mainstream transmission methods use physical connection, which has high inherent production costs, troublesome line laying and complicated engineering installation.

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