Regenerative UTC (Universal Time Coordinated) atomic time ultrahigh precision time frequency synchronization network

A time-frequency and time synchronization technology, applied in time-division multiplexing systems, electrical components, multiplexing communications, etc. Accuracy and other issues

Inactive Publication Date: 2012-07-04
大唐电信(成都)信息技术有限公司
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Problems solved by technology

[0003] However, there are inevitably problems with the safety and reliability of the air time-frequency synchronization network. First, the harsh natural and climatic factors in space / air affect the accuracy of satellite positioning and navigation timing; another important safety factor is that the availability of the satellite navigation system is completely restricted by the country that owns the system and is easily under attack to render the ground receiving system unable to receive the air time-frequency reference signal

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  • Regenerative UTC (Universal Time Coordinated) atomic time ultrahigh precision time frequency synchronization network
  • Regenerative UTC (Universal Time Coordinated) atomic time ultrahigh precision time frequency synchronization network
  • Regenerative UTC (Universal Time Coordinated) atomic time ultrahigh precision time frequency synchronization network

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Embodiment Construction

[0019] The present invention is described in further detail below in conjunction with accompanying drawing:

[0020] see figure 1 , the ultra-high-precision time-frequency synchronization network of the present invention connects the time synchronization master station and the time synchronization slave station through optical fibers when regenerating UTC atoms, and is characterized in that: a first-level communication network across provinces and cities is established and carried on the optical cable optical transmission network , set up HTF-BITS equipment on the time synchronization master station and time synchronization slave station respectively, the HTF-BITS equipment is equipped with cesium clock Cs, rubidium clock Rb, DCXO or VCXO, to complete the ultra-high precision time between cesium species and cesium species Frequency synchronization or mutual synchronization; or complete master-slave synchronization between cesium clock and rubidium clock; mutual synchronization...

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Abstract

The invention discloses a regenerative UTC (Universal Time Coordinated) atomic time ultrahigh precision time frequency synchronization network. The regenerative UTC atomic time ultrahigh precision time frequency synchronization network is connected with a time synchronization master station and a time synchronization slave station through optical fibers. An interprovincial and interurban primary communication network is established and borne on an optical-cable optical transport network. HTF-BITS equipment is respectively arranged on the time synchronization master station and the time synchronization slave station. A caesium clock Cs, a rubidium clock Rb, a DCXO (Digital Control X-tal Crystal Oscillator) or a VCXO (Voltage Control X-tal Crystal Oscillator) is arranged on each piece of HTF-BITS equipment. The ultrahigh precision time frequency synchronization or mutual synchronization between the caesium clocks is completed; or the master-slave synchronization between the caesium clocks and the rubidium clocks is completed; the mutual synchronization between the caesium clocks is completed; the master-slave synchronization between the rubidium clocks and the DCXOs is completed; the mutual synchronization between the DCXOs is completed; the master-slave synchronization between the DCXOs and the VCXOs is completed; and as long as the synchronization network normally operates, any node can be a regenerative UTC atomic time frequency standard. The invention provides the novel all-round underground high-precision time frequency synchronization network which is used for transmitting the high-precision time reference by an underground optical-cable optical transmission system without depending on sky time established by navigation systems such as a GPS (Global Positioning System), the Beidou and the like.

Description

technical field [0001] The invention belongs to the technical field of UTC synchronization, and relates to a time-frequency synchronization network, in particular to an ultra-high-precision time-frequency synchronization network when regenerating UTC atoms. Background technique [0002] The sky time and frequency synchronization reference synchronization network established by satellite navigation systems such as Beidou, GPS, GLONASS, etc. has the advantage that any person or sensor can obtain a time reference with a difference of 300ns or less from UTC at any place on the earth at any time , providing services such as frequency reference <1E-11 / day. [0003] However, there are inevitably problems with the safety and reliability of the air time-frequency synchronization network. First, the harsh natural and climatic factors in space / air affect the accuracy of satellite positioning and navigation timing; another important safety factor is that the availability of the satel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04J3/06
Inventor 李忠文孟志才
Owner 大唐电信(成都)信息技术有限公司
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