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Underwater frequency transmission method and system based on active phase compensation

A frequency transfer, active phase technology, applied in transmission systems, optical transmission systems, electromagnetic wave transmission systems, etc., can solve the problems of complex structure of the transmitting end, limit the resolution of phase compensation, cost and increase in occupied space, etc., to achieve simple structure, Reduced complexity and low cost

Active Publication Date: 2021-10-22
成都金诺信高科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problem with this solution is that the residual timing jitter between the two phase shifters and the low-end frequency of the transmitted microwave limit the resolution of the phase compensation, resulting in a root-mean-square timing jitter that will not be smaller than the picosecond level
When it is necessary to transmit frequency to multiple receiving sites, the structure of the transmitting end will be very complicated, and the cost and occupied space will increase dramatically

Method used

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  • Underwater frequency transmission method and system based on active phase compensation
  • Underwater frequency transmission method and system based on active phase compensation
  • Underwater frequency transmission method and system based on active phase compensation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Underwater frequency transmission method based on active phase compensation, such as figure 1 As shown, including the following steps:

[0048] Step S100: The frequency source transmission frequency signal V is transmitted. 1 After the underwater link, the receiving end is transmitted to the receiving end, and the detection unit of the receiving end detects the frequency signal V. 4 ;

[0049] Step S200: The frequency source transmission frequency signal V is transmitted. 2 After the underwater link reaches the transmitting end, and after the reflection of the mirror of the transmitting end, it is again returned to the receiving end through the underwater link, and the detection portion of the receiving end is detected after the spatial link is separated. 3 ;

[0050] Step S300: Put the frequency signal V 3 With frequency signal V 4 Perform frequency mixing and filter out of the low frequency signal V 5 , Turn the frequency signal V 5 With frequency signal V 2 Get a near DC...

Embodiment 2

[0053] This embodiment is optimized on the basis of the first embodiment, the frequency source of the receiving end in the step S200 transmits frequency signal V. 2 After the polarization beam splitter, the modulated beam reaches the transmitting end through the underwater link and returns the polarization beam splitter of the receiving end after the reflection of the mirror, and then detects the frequency signal V. 3 .

[0054] Further, frequency signal V 1 Expressed as:

[0055]

[0056] Where f 1 Is the frequency of the sender, It is the initial phase of the sender;

[0057] Frequency signal V 2 Expressed as:

[0058]

[0059] Where f 2 Is the frequency of the receiving end, Is the initial phase shift of the receiving end;

[0060] Frequency signal V 3 Expressed as:

[0061]

[0062] in Is frequency signal V 2 Due to the phase fluctuation caused by the underwater link;

[0063] Frequency signal V 4 Expressed as:

[0064]

[0065] in Is frequency signal V 1 Due to th...

Embodiment 3

[0075] This embodiment is optimized on the basis of Example 1 or 2, such as figure 1 As shown, the receiving end is provided with several extensions, the transmitting passage including a mirror and a laser output channel; the frequency signal V transmitted by the transmitting end 1 The detection unit of the receiving end is transmitted to the receiving end and the frequency signal V is transmitted to the receiving end. 4 .

[0076] The technical solution proposed by the present invention supports frequency transfer simultaneously for multiple accept sites, solving problems that are difficult to perform frequencies to multiple reception sites simultaneously to multiple reception sites, such as star frequencies The transfer network is of great significance.

[0077] The other portions of the present embodiment are the same as those of the above-described Embodiment 1 or 2, so it will not be described again.

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Abstract

The invention discloses an underwater frequency transmission method and system based on active phase compensation. The system comprises a receiving end and a transmitting end, wherein the receiving end and the transmitting end are each provided with a frequency source and a laser connected with the output end of the frequency source; the receiving end is provided with a reflector and a laser output channel; the receiving end is provided with a phase compensation module; the phase compensation module is used for mixing a frequency signal V3 and a frequency signal V4, filtering out a low-frequency signal V5, mixing a frequency signal V5 and a frequency signal V2 to obtain an error signal V6, and feeding back the error signal V6 through a phase-locked loop to control the phase of a frequency source of the receiving end. According to the invention, the problem of phase jitter is solved by using the active phase compensation technology, the problem that frequency transmission cannot be carried out to a plurality of receiving stations at the same time by using the existing frequency transmission technology is solved, and the practicability is good.

Description

Technical field [0001] The present invention belongs to the technical field of underwater communication and time synchronization, and more particularly to an underwater frequency transmission method and system based on active phase compensation. Background technique [0002] Discovering and utilizing various resources in the ocean is one of the most important development strategies in the new century. The underwater communication technology that is born also has attracted the extensive attention of researchers. For a long time, underwater communication technology is widely used in underwater sensor network construction, underwater observation systems, etc. Traditional underwater communication systems require fiber optic links to form communication channels, which makes it only for communication tasks between fixed targets, which are not well flexible, and cost cannot be controlled well. Therefore, the development of underwater wireless communication technology has become the main...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/67H04B10/80
CPCH04B10/80H04B10/671
Inventor 侯冬曾迎春朱敏刘波简和兵龚鹏张中正
Owner 成都金诺信高科技有限公司
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