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Multi-carrier signal time delay online calibration system

A multi-carrier signal, calibration system technology, applied in the field of radio measurement, to reduce transmission distortion, accurate measurement, and improve the accuracy of delay calibration

Active Publication Date: 2015-10-21
10TH RES INST OF CETC
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Problems solved by technology

[0003] The purpose of the present invention is to propose to establish a multi-carrier delay signal online calibration system to solve the current real-time online calibration of the multi-carrier time delay based on the multi-carrier format spread spectrum measurement and control system and the Beidou second generation system, and to solve related problems in other fields. On-site Calibration of Multi-carrier Spread Spectrum Signals

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  • Multi-carrier signal time delay online calibration system

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Embodiment Construction

[0017] refer to figure 1 . In a preferred embodiment described below, the multi-carrier delay signal online calibration system includes a signal acquisition device placed in the antenna central body, a synchronization signal transmission device, a multi-carrier signal separation system and a delay measurement set in a computer System, the multi-carrier signal of the measured multi-carrier system is directly output to the input end of the acquisition device through the antenna feed front-end coupling, and the pulse synchronization signal from the baseband is passed through the synchronization signal transmission device based on optical fiber transmission technology. The synchronization signal transmission device divides the pulse synchronization signal from the baseband into a synchronization signal and a synchronization calibration signal, or divides the pulse synchronization signal from the baseband into two signals, one is a synchronization signal and the other is a synchron...

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Abstract

The invention provides a multi-carrier time delay signal online calibration system. By using the system, on-line real-time calibration can be provided for signal transmission of a Beidou satellite navigation system and a spaceflight measurement and control system and an influence of off line calibration on precision can be avoided. Precision of distance measurement and positioning is increased. A technical scheme is characterized in that a synchronous signal transmission device divides pulse synchronization signal work into a synchronous signal and a synchronous calibration signal; the synchronous calibration signal is divided into two transmission paths which are switched successively so as to realize automatic calibration of synchronous signal transmission time delay; the synchronous signal and the synchronous calibration signal are transmitted to a receiving end of a signal acquisition device, an uplink multicarrier signal of a tested multi-carrier system and a pulse synchronization signal are converted into a light signal; the light signal is sent to a multicarrier signal separation system through Ethernet transmission and is separated into a single carrier; a time delay measurement system adopts Hilbert transform to carry out solution envelope on a separated single carrier modulation signal; and then on-line measurement is performed on separated single carrier time delay.

Description

technical field [0001] The present invention relates to a metering and calibrating device for time delay parameters in the field of radio metering. More specifically, the present invention relates to a metering and calibrating device mainly used in Beidou satellite navigation system and the field of new-generation spread spectrum measurement and control, which is used to realize BPSK or QPSK modulation multiple On-site online calibration system for carrier signal delay. Background technique [0002] The Beidou satellite navigation system and the new generation of spread spectrum measurement and control system realize positioning and measurement and control by calibrating the delay difference of signal transmission. Signal transmission delay is mainly divided into ground equipment transmission delay and space transmission delay. The calibration of the ground and space transmission delays currently adopts the offline calibration method. Before the system is put into use, the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B17/40H04B17/11
Inventor 胡勇张靖悉李玥梁桂海沈世科
Owner 10TH RES INST OF CETC
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