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Single-channel time frequency high-precision transmission device

A time-frequency and transmission device technology, which is applied in the field of single-channel time-frequency high-precision transmission devices, can solve the problems of sine wave signal phase difference jumps and instability, etc., to improve accuracy, ensure two-way symmetry, and save channels resource effect

Active Publication Date: 2019-08-27
NAT INST OF METROLOGY CHINA
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Problems solved by technology

[0006] The existing technology realizes the sub-picosecond level stability of the sine wave signal phase of the local end and the sine wave signal phase of the remote end. The phase difference of the terminal sine wave signal usually jumps and is not fixed, so the current technology has not used the phase of the sine wave signal as a fine mark of the time in combination with the second pulse

Method used

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Embodiment Construction

[0039] In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of one or more embodiments. It may be evident, however, that these embodiments may be practiced without these specific details.

[0040] figure 1 It is a block diagram of the single-channel time-frequency high-precision transfer device of the present invention, as figure 1 As shown, the single-channel time-frequency high-precision transmission device includes a local terminal 1 and a remote terminal 2, the signal between the local terminal 1 and the remote terminal 2 is transmitted through a single channel, and the local terminal 1 includes a first Time-sharing module 11, described remote end 2 comprises the second time-sharing module 21, and described first time-sharing module 11 and described second time-sharing module 21 complete second pulse signal and frequency signal at local end 1 and Transmission between remote termina...

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Abstract

The invention provides a single-channel time-frequency high-precision transmission device, which comprises a local end and a remote end which are transmitted through a single channel and the local endcomprises a first time-sharing module and the remote end comprises a second time-sharing module, the first time-sharing module and the second time-sharing module transmit second pulse signals and frequency signals between the local end and the remote end in a time-sharing manner, and every 1 second is divided into 2N time periods; in the T1 time period, the local end sends the second pulse signalto the remote end, and the remote end receives the second pulse signal; in the T2 time period, the remote end sends the second pulse signal, and the local end receives the second pulse signal; in theT<2n-1> time period, n is equal to 2-N, the local end sends a frequency signal and the remote end receives the frequency signal; and in a T2n time period, the remote end sends the frequency signal, the local end receives the frequency signal, wherein the frequency signal and the second pulse signal are taken as time signal marks, the second pulse signal is taken as a time coarse mark, the frequency signal phase is taken as a time fine mark, and a fixed alignment relation is kept between the frequency signal phase and the second pulse signal.

Description

technical field [0001] The invention relates to the technical field of time-frequency transfer synchronization, and more specifically, to a single-channel time-frequency high-precision transfer device. Background technique [0002] Usually, in the high-precision transmission of time and frequency, the transmission of the time signal and the transmission of the frequency signal are carried out separately. One channel is occupied by the second pulse transmission synchronously; the frequency signal transmission occupies two channels, one channel is used to transmit the sine wave signal from the local end to the remote end, and the other channel is used to transmit the sine wave signal from the remote end to the local end to eliminate the line The effect of delay variation. [0003] Usually only the second pulse signal is used as the mark of the time signal, so the accuracy of time transfer is difficult to improve, usually it is difficult to exceed 20ps. [0004] In order to s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L7/00H04L7/02
CPCH04L7/0075H04L7/0087H04L7/02
Inventor 林平卫
Owner NAT INST OF METROLOGY CHINA
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