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Satellite signal positioning and error correction method and system, positioning terminal and program

A satellite signal and error correction technology, applied in the field of communication, can solve problems such as failure of normal communication and degradation of communication quality

Pending Publication Date: 2022-03-01
SEAS BEIJING INFORMATION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the openness of satellite communication, it is extremely vulnerable to intentional or unintentional interference, resulting in a decrease in communication quality or even failure of normal communication

Method used

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  • Satellite signal positioning and error correction method and system, positioning terminal and program
  • Satellite signal positioning and error correction method and system, positioning terminal and program
  • Satellite signal positioning and error correction method and system, positioning terminal and program

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0072] The traditional positioning method includes two steps: firstly, the time difference of arrival (TDOA) and frequency difference of arrival (FDOA) and other measurement parameters are estimated by using algorithms such as the mutual ambiguity function method, and then these measurement parameters are used Locate the source of interference. In the satellite interference source positioning scenario, due to the low side lobes of the transmitting antenna of the interference source, the signal-to-noise ratio of the received signal of the adjacent satellite near the main star is very low. At this time, it is difficult to accurately estimate TDOA and FDOA directly using algorithms such as the mutual ambiguity function method. In order to obtain a higher processing gain for the weak signal of the adjacent star, the signal processing time can be increased to increase the processing gain when the bandwidth of the signal transmitted by the interference source is fixed. A problem th...

Embodiment 2

[0184] Such as Figure 5 As shown, the embodiment of the present invention provides a satellite signal positioning and error correction system, including: a model building module for building a received signal model of satellite motion;

[0185] In the embodiment of the present invention, the expression of the received signal model is as the formula (15) in Embodiment 1.

[0186] The location estimation module is used to use the received signal model to perform layered processing on the received signal, and according to the layered processing result, and use the maximum likelihood method to estimate the location of the interference source under long-term observation;

[0187] In the embodiment of the present invention, the maximum likelihood method is used to estimate the location of the interference source under long-term observation, and the received signal is segmented into two layers, wherein the segmented signal of the first layer adopts non-coherent processing, and the s...

Embodiment 3

[0192] The present invention provides a positioning terminal, including:

[0193] one or more processors;

[0194] storage means for storing one or more programs;

[0195] When the one or more programs are executed by the one or more processors, the one or more processors implement the described positioning and error correction method.

[0196] In the embodiments of the present invention, the positioning terminal may be implemented by software and / or hardware, and the positioning terminal may execute any method in Embodiment 1, and / or execute any block diagram in Embodiment 2, the positioning The terminal is used in the scenario of satellite interference source positioning.

[0197] The present invention provides a computer-readable storage medium, which stores a computer program, and the computer program is executed by a processor to implement the positioning and error correction method.

[0198] In an embodiment of the present invention, a computer-readable storage medium...

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PUM

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Abstract

The invention provides a satellite signal positioning and error correction method and system, a positioning terminal and a program, and belongs to the technical field of communication. Carrying out hierarchical processing on the received signal by utilizing a received signal model, and carrying out interference source position estimation under long-time observation by utilizing a maximum likelihood method according to a hierarchical processing result; error correction is carried out on interference source position estimation, and satellite signal positioning and error correction are completed. The invention provides a direct positioning method under long-time observation aiming at the interference source positioning problem under the condition that adjacent satellite receiving signals are weak signals. According to the method, satellite motion is considered in a received signal model, and interference source position estimation is obtained by using coherent and non-coherent processing modes. In addition, the invention further provides an error correction algorithm for errors such as satellite forwarding frequency, and high-precision positioning of the interference source is realized by utilizing weak signals of adjacent satellites.

Description

technical field [0001] The invention belongs to the technical field of communication, and in particular relates to a satellite signal positioning and error correction method, system, positioning terminal and program. Background technique [0002] Satellite communication has the advantages of wide coverage and long communication distance, and has gradually become an important development direction. Due to the openness of satellite communication, it is extremely vulnerable to intentional or unintentional interference, resulting in a decrease in communication quality or even failure of normal communication. At present, hundreds of satellite communication interference events occur every year, and the trend is on the rise. In the positioning of satellite interference sources, the signal-to-noise ratio of neighboring satellites is very low, making it difficult to locate them. Therefore, it is of great significance to accurately locate satellite interference sources. Contents of...

Claims

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Application Information

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IPC IPC(8): G01S19/41G01S19/21G01S19/23
CPCG01S19/41G01S19/21G01S19/23
Inventor 夏荣信夏畅雄吴冰
Owner SEAS BEIJING INFORMATION TECH CO LTD
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