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Systems and methods for transmitting time-frequency signals in optical fibers

A technology of frequency signal and transmission time, which is applied in the fields of timing, navigation and communication, can solve the problems of fuzzy rising or falling edge of second pulse, difficult alignment of second pulse and frequency transmission, difficult alignment of transmitter signal, etc., to achieve channel consistency Good, convenient signal routing selection, the effect of improving accuracy

Active Publication Date: 2021-12-07
深圳市慧宇系统有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

That is, the existing technology adopts the method of separately transmitting the second pulse, frequency signal and time management control information. This method has very obvious disadvantages: the second pulse and frequency transmission are difficult to align, not only the two signals at the transmitting end are difficult to align , and different wavelengths experience different channel conditions in the transmission process, and different transmission delays may occur
Sometimes the rising or falling edge of the second pulse is easily distorted during transmission, thus blurring the rising or falling edge of the second pulse, resulting in time transmission errors
[0010] In addition, the existing technology often uses the direct transmission of the basic frequency, such as the frequency of 10MHz or 100MHz, the second pulse directly transmits this pulse or performs modulation after spread spectrum, and the transmission accuracy is not very high

Method used

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  • Systems and methods for transmitting time-frequency signals in optical fibers
  • Systems and methods for transmitting time-frequency signals in optical fibers
  • Systems and methods for transmitting time-frequency signals in optical fibers

Examples

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Embodiment 1

[0069] Such as figure 1 As shown, the system for transmitting time-frequency signals in an optical fiber includes a transmitting end and a receiving end. The transmitting end is used for modulating the time-frequency signal to be transmitted into one modulation signal, and sending out the modulation signal. The time-frequency signal to be transmitted includes a second pulse signal and a frequency signal. The receiving end is used for receiving and demodulating the modulated signal sent by the transmitting end, and processing the demodulated signal to obtain a time-frequency signal. By mixing and modulating the second pulse signal and the frequency signal into one signal for transmission, the optical fiber wavelength resource is saved, and the second pulse signal and the frequency signal are transmitted at the same time, and the channel consistency is good. In some embodiments, the time-frequency signal also includes TOD information and / or management control information, for e...

Embodiment 2

[0086] Such as image 3 As shown, the methods for transmitting time-frequency signals in optical fibers include:

[0087] S1. The transmitting end modulates the time-frequency signal to be transmitted into one modulated signal, and sends out the modulated signal. The time-frequency signal to be transmitted includes a second pulse signal and a frequency signal.

[0088] In this embodiment, the second pulse signal and the frequency signal are mixed and modulated into one signal for transmission, which saves optical fiber wavelength resources, and the second pulse signal and the frequency signal are transmitted at the same time, and the channel consistency is good. In some embodiments, the time-frequency signal further includes TOD information and / or management control information, for example, the time-frequency signal includes a second pulse signal, a frequency signal, TOD information and / or management control information, and at this time the second pulse signal , frequency s...

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Abstract

The invention discloses a system and method for transmitting time-frequency signals in an optical fiber, wherein the system for transmitting time-frequency signals in an optical fiber includes: a transmitting end for modulating a time-frequency signal to be transmitted into a modulation signal, and converting the time-frequency signal into a modulation signal The modulated signal is sent, and the time-frequency signal to be transmitted includes a second pulse signal and a frequency signal; the receiving end is used to receive and demodulate the modulated signal sent by the transmitting end, and process the demodulated signal to obtain time-frequency signal. The invention mixes and modulates the second pulse signal and the frequency signal into one signal for transmission, which saves optical fiber wavelength resources, and transmits the second pulse signal and the frequency signal at the same time, and the channel consistency is good.

Description

technical field [0001] The invention belongs to the fields of time service, navigation and communication, in particular to a system and method for transmitting time-frequency signals in optical fibers. Background technique [0002] Since optical fiber has been widely deployed at present, and optical fiber has the characteristics of good anti-interference and low loss, it is suitable for long-distance transmission. Therefore, the use of optical fiber for time and frequency transmission is a research hotspot at home and abroad. [0003] Using optical fiber to transmit time and frequency actually needs to transmit the following information: [0004] (1) second pulse; [0005] (2) frequency; [0006] (3) The current time, such as which day and which second; [0007] (4) Management, control, alarm and maintenance information. [0008] In the prior art, three wavelengths or four wavelengths in an optical fiber are generally used for transmission, wherein one wavelength is used...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B10/25H04B10/516H04B1/69
CPCH04B1/69H04B10/516
Inventor 姚春波赵峰李坤李广
Owner 深圳市慧宇系统有限公司
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