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Method and system for realizing large-scale parallel real-time transmission of Beidou satellite navigation signals

A signal transmission and navigation signal technology, applied in the field of satellite navigation, can solve the problems that the power of navigation signals cannot be guaranteed, and the high-speed transmission of navigation messages cannot be realized.

Active Publication Date: 2020-02-18
WUHAN UNIV
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Problems solved by technology

[0005] In addition, Beidou navigation satellites are powered by solar-charged batteries. In addition to ensuring the transmission power of navigation signals at each frequency point, they also need to supply power for other loads in the system. Therefore, the use of large-scale multi-antenna parallel signal transmission branch transmission methods will not Ensure that the navigation signals transmitted by each antenna have sufficient power, let alone realize the high-speed transmission of navigation messages to meet the needs of users for real-time positioning

Method used

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  • Method and system for realizing large-scale parallel real-time transmission of Beidou satellite navigation signals
  • Method and system for realizing large-scale parallel real-time transmission of Beidou satellite navigation signals
  • Method and system for realizing large-scale parallel real-time transmission of Beidou satellite navigation signals

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Embodiment Construction

[0087] Since the small and medium scale parallel signal transmission branch, large scale parallel signal transmission branch and ultra large scale parallel signal transmission branch realize the same principle in real-time satellite navigation signal transmission technology, for this reason, this example will use the navigation satellite transmitter as the medium and small The realization of the large-scale parallel signal transmission branch system is explained, according to figure 1 The implementation steps are as follows:

[0088] S1 takes satellite parallel signal transmission branches as 4 channels;

[0089] S2 generates a binary satellite navigation message with a length of 24 bytes, divides it into 4 groups, each group has 6 bytes, and forms a 4×6 matrix;

[0090] S3 sends the grouped satellite navigation messages to 1~4 parallel signal transmission branches in turn;

[0091] S4 takes the state variable x of 3 x with different parameters 1 、x 2 、x 3 A set of non-li...

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Abstract

The invention discloses a method and system for large-scale parallel real-time transmission of Beidou satellite navigation signals. The method of the invention constructs a large-scale parallel signal transmission branch, carries out large-scale grouping of satellite navigation messages according to the structure, and sequentially sends them into parallel signal transmission branch, using a complex number shift pseudo-random code generator to obtain the sub-ranging code dedicated to the parallel transmission branch of the navigation satellite, respectively spread the navigation message of each branch, first modulate with the same carrier with different frequency offsets, and then convert all branch The carrier modulation navigation signal is superimposed and noise is added to form a composite satellite navigation signal, and finally it is sent through a single antenna, and the receiving end uses a single antenna to receive the received navigation signal according to the branch. Parallel to serial, realize real-time navigation and positioning of the Beidou satellite navigation system by obtaining navigation messages. The invention can be widely used in satellite navigation systems, and can also be used in various ranging systems, communication systems, radio and television systems and control systems.

Description

technical field [0001] The invention relates to the technical field of satellite navigation, in particular to a method and system for realizing large-scale parallel real-time transmission of Beidou satellite navigation signals. Background technique [0002] The world's four major satellite navigation systems include the GPS (Global Positioning System) satellite navigation system of the United States, the GLONASS (Global Navigation Satellite System) satellite navigation system of Russia, the Galileo satellite navigation system of the European Union and the BeiDou satellite navigation system of China. Navigation and positioning are realized by providing users with navigation messages. The navigation messages of the Beidou satellite navigation system are divided into traditional D1 and D2 navigation messages according to the speed and structure, and B-CNAV1 and B-CNAV2 navigation based on the data block format of the information type. Message: D1 and D2 navigation messages are ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/185
CPCH04B7/1851G01S19/02G01S19/243H04B1/69H04B7/18513
Inventor 何志彪肖模艳
Owner WUHAN UNIV
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