Time comparison system for digital real-time processing, and comparison method

A technology of time comparison and real-time processing, applied in radio wave measurement systems, satellite radio beacon positioning systems, measurement devices, etc. Transfer and ensure real-time effect

Active Publication Date: 2019-11-19
NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a time comparison system and comparison method for digital real-time processing, which solves the problems of complex circuits and

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  • Time comparison system for digital real-time processing, and comparison method
  • Time comparison system for digital real-time processing, and comparison method
  • Time comparison system for digital real-time processing, and comparison method

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[0024] The present invention will be further described below with reference to the drawings and examples. The implementation of the present invention includes but is not limited to the following examples.

[0025] Such as figure 1 As shown, the present invention adopts the ADC analog-to-digital conversion method to directly digitize the local frequency standard to obtain the local second pulse. The local second pulse is compared with the satellite second pulse to obtain the initial time between the local second pulse and the satellite second pulse. Interval signal, the signal passes through the edge expansion circuit to expand the falling edge of the edge to obtain the time interval signal after the edge expansion, and then the time interval between the satellite second pulse and the local second pulse is calculated by the time comparison method of edge fitting length.

[0026] A digital real-time processing time comparison system includes four parts: a satellite signal receiving u...

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Abstract

The invention discloses a time comparison system for digital real-time processing, and a comparison method. The system comprises a satellite signal receiving unit, a local frequency scale digitalization unit, a time measurement unit, and a data processing unit; the system is assisted by a time comparison method of edge effect and edge fitting of the ADC data conversion, the digital processing is directly performed on an initial time interval signal between the local frequency scale and a satellite signal and the local frequency scale; a falling edge of the initial time interval signal obtainedthrough the digital timing sequence comparison is expanded through an edge expansion circuit, and the measurement on the time interval length is accomplished by utilizing a voltage time function relation of the falling edge process of the time interval signal after reconstructing the edge expansion. The work needing to accomplish under a simulation environment in the time transfer process is directly transferred to the digital environment through the digital processing of the time comparison, the high performance of an analog-to-digital converter and the high-speed operation capacity of a digital signal processor greatly improve the response time of the system, and the instantaneity of the time comparison is guaranteed.

Description

technical field [0001] The invention relates to the field of time-frequency measurement technology and control, and its application includes a wide range of fields such as test measurement and frequency standard technology, communication, instrumentation, navigation and positioning, and electronic engineering. Background technique [0002] Due to its wide coverage, high precision, and low cost of use, the satellite system has gradually become the preferred time service method for the public. High-precision time service is the support of national economic development, national defense construction, and space technology, and is of great significance to satellite positioning, aerospace, information transmission, and military operations. An important feature of modern time-frequency measurement is that it can realize long-distance time-frequency transfer. The "time unified system" provides an essential time reference and basis for the measurement and quantitative research of th...

Claims

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Application Information

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IPC IPC(8): G01S19/25
CPCG01S19/256
Inventor 白丽娜蔚保国韩华燕雯王远杨子义
Owner NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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