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Tiantong satellite-borne terminal Doppler frequency compensation device and method

A Doppler frequency and frequency compensation technology, which is applied in the field of satellite mobile communication, can solve the problems of satellite-borne terminal reception signal distortion, increase algorithm complexity, and high equipment cost, and achieve simple, reliable, reliable communication, and high operating efficiency. Effect

Pending Publication Date: 2022-04-15
NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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Problems solved by technology

[0005] At present, there is no detailed introduction to the Doppler frequency estimation and frequency compensation methods of spaceborne terminals in the prior art. The known Doppler frequency offset estimation methods are mainly realized by increasing the complexity of the algorithm, which is difficult to implement and requires equipment high cost
In order to solve the problem of signal distortion caused by the large Doppler frequency deviation of the space-borne terminal, the present invention proposes a Doppler frequency compensation device and method for the space-borne terminal of Tiantong Satellite

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  • Tiantong satellite-borne terminal Doppler frequency compensation device and method
  • Tiantong satellite-borne terminal Doppler frequency compensation device and method

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Embodiment Construction

[0025] The present invention will be further explained below in conjunction with accompanying drawing.

[0026] refer to figure 1 and figure 2 , a Doppler frequency compensation device for a Tiantong satellite-borne terminal, comprising a radio frequency interface module, an FCCH channel capture and strength measurement module, a Doppler frequency shift and rate-of-change estimation module, a frequency compensation module, and a central processing unit;

[0027] The radio frequency interface module is used to receive serial data, convert the serial data into parallel data according to the Tiantong radio frequency interface protocol, and transmit it to the FCCH channel acquisition and intensity measurement module;

[0028] The FCCH channel acquisition and strength measurement module is used to search the FCCH channel according to the frequency points configured by the central processor, estimate the signal-to-noise ratio and find the frequency point with the best signal-to-no...

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Abstract

The invention discloses a Tiantong satellite-borne terminal Doppler frequency compensation device and method, and belongs to the field of satellite communication. The method mainly comprises the following steps that: firstly, a terminal searches an FCCH (Frequency Control Channel) signal at a specified frequency point, estimates a signal-to-noise ratio, searches a frequency point with the best signal-to-noise ratio, estimates the signal-to-noise ratios of a resident beam and an adjacent beam FCCH channel in real time, and outputs frequency information of the resident beam FCCH channel; reading ephemeris information and a Tiantong orbital motion information file to obtain ephemeris information and Tiantong orbital motion information at the current moment; calculating a Doppler frequency offset value and a Doppler frequency offset change rate according to resident beam FCCH channel frequency information in combination with ephemeris information and Tiantong orbital motion information; and finally, compensating an uplink signal and a downlink signal of the terminal according to the Doppler frequency offset value and the Doppler frequency offset change rate. According to the invention, the problem of distortion of signals received by the satellite-borne terminal caused by large Doppler frequency offset can be solved, so that reliable communication between the satellite-borne terminal and the Tiantong satellite can be ensured.

Description

technical field [0001] The invention belongs to the technical field of satellite mobile communication, and in particular relates to a Doppler frequency compensation device and method for a Tiantong satellite-borne terminal. Background technique [0002] An important feature of satellite communication is that it covers a wide range, and the purpose of global communication can be achieved by using multiple satellites. Therefore, the development speed of satellite communication technology is extremely rapid in the past 20 years. Tiantong satellite mobile communication system is the first generation of satellite mobile communication system with independent intellectual property rights in my country. Tiantong satellite mobile communication uses geostationary orbit satellite transponders as relay stations to complete the communication between the terminal and the ground station. It is related to the ground communication. In contrast, satellite mobile communication has the character...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/185
CPCY02D30/70
Inventor 仲伟强周微王力男张庆业王力权
Owner NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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