Method for measuring system channel zero value by real-time calibration intersatellite time difference
A technique for measuring system, time difference
Inactive Publication Date: 2018-02-02
10TH RES INST OF CETC
View PDF2 Cites 10 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
At present, the existing calibration methods for the channel zero value are: for the traditional satellite-ground measurement and control transponder and ground measurement and control station system, but not suitable for inter-satellite time difference measurement and calibration; in addition, there are two-way time and frequency between ground stations In the transmission system, the ground station equipment delay calibration is not suitable for inter-satellite real-time equipment calibration
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0017] refer to figure 1 . According to the present invention, two-way one-way measurement technology is adopted to construct the inter-satellite two-way time difference measurement system, and then, according to the inter-satellite two-way time difference measurement system design system transceiver channel shares a radio frequency closed-loop self-test model of the baseband signal processing module; in the radio frequency closed-loop self-test mode , select satellite A or satellite B to transmit the test sequence, through the radio frequency self-test loop of the system transceiver channel, perform high-precision phase estimation on the received signal through the baseband signal processing module, and then combine the test sequence time scale signal sent by the baseband to calculate , to get the delay value of the receiving and transmitting channel of the system, and the satellite system calibrates the zero value of the transmitting and receiving channel in real time accord...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a method for measuring a system channel zero value by a real-time calibration intersatellite time difference, and aims at providing a zero value method with few error links andhigh time synchronization measurement precision. The method disclosed by the invention is achieved by the following technical scheme: constructing an intersatellite two-way time difference measurement system by using a two-way one-way measurement technique, then designing system receiving and sending channels to share a radio frequency closed loop self measurement model of a baseband signal processing module according to the intersatellite two-way time difference measurement system; in a radio frequency closed loop self measurement mode, selecting a satellite A or a satellite B to transmit atest sequence, performing high-precision phase estimation on the received signal via the baseband signal processing module, and performing calculation in combination with a time mark signal of the test sequence sent by the baseband to obtain delay values of the system receiving and sending channels, and performing real-time calibration on the zero values of the receiving and sending channels by the satellite system according to the calculated delay values.
Description
technical field [0001] The invention relates to a method for calibrating the channel zero value of an inter-satellite time difference measurement system in real time. Background technique [0002] With the development of constellations, constellations, and formation satellites, satellite distributed networking has become the trend of modern satellite development, and is playing an increasingly important role in the fields of communication, remote sensing, navigation, and electronic reconnaissance. Network each satellite system to realize information sharing between satellites and meet various military needs of satellites. In recent years, the application results of aerospace technology have had a huge impact on communications, navigation and positioning, oceans, resources, meteorology, and space science exploration. A single spacecraft can no longer meet the low-cost, high-reliability, fast, and efficient requirements required by aerospace technology. [0003] The accurate...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): H04J3/06H04B17/364H04B7/185
CPCH04J3/0638H04B7/18521H04B17/364H04J3/0682
Inventor 刘明凯
Owner 10TH RES INST OF CETC