Capturing and tracking system based on relay terminal and automatic target tracking method

A tracking system and terminal technology, applied in the transmission system, radio transmission system, radio wave measurement system, etc., can solve the problems of high target pointing accuracy, low signal-to-noise ratio, and small cross-coupling of relay terminals to meet the target The effect of pointing tracking requirements and high system sensitivity

Active Publication Date: 2014-02-19
XIAN INSTITUE OF SPACE RADIO TECH
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AI Technical Summary

Problems solved by technology

[0006] Therefore, the existing automatic tracking method of the second-generation relay satellite is not suitable, and cannot meet the task requirements of the relay terminal with small cross-coupling, large signal dynamics, low signal-to-noise ratio, and high target pointing accuracy.

Method used

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  • Capturing and tracking system based on relay terminal and automatic target tracking method
  • Capturing and tracking system based on relay terminal and automatic target tracking method
  • Capturing and tracking system based on relay terminal and automatic target tracking method

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Embodiment Construction

[0034] Specific embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0035] The present invention provides a capture and tracking system based on relay terminals, such as figure 1 As shown, it includes Ka relay antenna, first filter module, second filter module, first LNA module, second LNA module, single-channel modulation module, Ka / C frequency conversion module, acquisition and tracking module and servo control module.

[0036] The Ka relay antenna receives the single beacon signal of the external Ka frequency band and outputs the sum signal and the difference signal. The Ka relay antenna includes a feed source, and its feed source includes TE 11 coupler and TE 21 Multi-mode coupler, the Ka-band single beacon signal input from the outside passes through the TE 11 coupler formation and signal, via TE 21 A multimode coupler forms the difference signal. The sum signal is filtered and low-noise ampl...

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Abstract

The invention discloses a capturing and tracking system based on a relay terminal and an automatic target tracking method. The system comprises a Ka relay antenna, a filter module, a low noise amplifier module, a single-channel modulation module, a Ka/C frequency conversion module, a capturing and tracking module and a servo control module. Due to the adoption of the automatic target tracking method, a relay satellite beacon antenna forward single-beacon signal can be captured and tracked by a low-track satellite relay terminal. Compared with the technology that TM01 is adopted as a difference mode and an analog processing method is adopted in the prior relay satellite technology, the automatic target tracking method has the advantages that a TE11 sum mode and TE21 difference mode higher-order mode error generation method meets the requirements that any polarization signal can be tracked by the relay terminal and azimuth and pitching error cross coupling is small; due to the utilization of a method for capturing and tracking a beacon signal large in frequency offset and low in signal to noise ratio, large-frequency-offset frequency compensation and dynamic tracking are achieved, and system sensitivity is high; due to the utilization of a digital azimuth error delta A and pitching error delta E extraction, separation and filter method, requirements for high-precision target orientation and tracking are met.

Description

technical field [0001] The invention relates to an acquisition and tracking system and an automatic target tracking method based on a relay terminal, which are mainly used in relay acquisition and tracking systems of various low-orbit spacecraft, and belong to the technical field of satellite radio tracking and measurement. Background technique [0002] my country's second-generation relay satellites have completed the network communication of three relay satellites, which has increased the space-based measurement and control arc of low-orbit satellites to about 83%, greatly improving the coverage of measurement and control. [0003] Relay satellite inter-satellite antenna points to take TE 11 The modulus is the sum modulus, TM 01 The two-mode three-channel self-tracking method is differential mode, and for the relay terminal broadband SQPSK modulated payload signal, the azimuth error and pitch error are separated in an analog way. A 360° phase shifter is added to the sum ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/185G01S13/66
Inventor 赵鸿王宏卓彭碧玉李静澜朱宝骏
Owner XIAN INSTITUE OF SPACE RADIO TECH
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