Method and system for calibrating relative signal time delay of link of deep-space large-aperture antenna
Through the signal transparent forwarding mechanism and phase difference slope estimation method of the in-orbit satellite, the problem of signal delay calibration of the link of large-aperture antennas in deep space is solved, and simplified antenna array system design and signal synthesis are achieved.
CN120729441APending Publication Date: 2025-09-3010TH RES INST OF CETC
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Patent Information
- Application Number
- CN202510941879.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-09
- Publication Date
- 2025-09-30
AI Technical Summary
Technical Problem
The far-field conditions of large-aperture deep-space antennas are difficult to achieve, which makes it difficult to calibrate the link signal delay of the antenna array itself.
Method used
By utilizing the signal transparent forwarding mechanism of the on-orbit satellite and establishing a calibration loop between the antenna array and the satellite, the uplink and downlink delays of the antenna are measured, and the relative signal delay value is calculated and compensated using the phase difference slope estimation method.
Benefits of technology
It realizes signal synthesis of large-aperture antenna arrays, simplifies system design, reduces costs, and does not require additional equipment, facilitating automated operation.
✦ Generated by Eureka AI based on patent content.
Abstract
The invention discloses a method and system for calibrating relative signal time delay of a link of a deep space large-aperture antenna, and the method comprises the steps: building a coordinate system based on a to-be-calibrated antenna and a reference antenna, and determining a signal phase difference caused by the spatial path difference between the to-be-calibrated antenna and the reference antenna in an antenna array and a satellite; obtaining a downlink signal relative phase difference and an uplink signal relative phase difference of the antenna to be calibrated relative to the reference antenna in the antenna array based on a signal phase difference caused by a space path difference between the antenna to be calibrated and the satellite and between the reference antenna and the satellite; obtaining a relative signal time delay value of a link of the antenna; and according to the relative signal time delay value of the own link of the antenna, compensating the own link of the antenna to be calibrated so as to realize the signal time delay of the own uplink and downlink of each antenna of the calibration array. The method is simple and reliable, and signal delay calibration of an uplink and a downlink of a deep-space large-aperture antenna can be conveniently realized.
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