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System and method for carrying out global information transmission by utilizing navigation satellite

A navigation satellite system and information transmission technology, applied in the transmission system, radio transmission system, electrical components, etc., can solve the problems of unable to find and decipher encrypted information, difficult to complete, etc., to improve system utilization, long working hours, major social benefits and the effects of

Active Publication Date: 2015-11-25
XIAN INSTITUE OF SPACE RADIO TECH
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  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

After the information is hidden, even if the encrypted multimedia data is intercepted by an illegal user, it can only read the multimedia content in the carrier, but cannot discover and decipher the encrypted information hidden in it.
[0009] For information hiding, it is difficult for possible monitors or illegal interceptors to discover the hidden secret information from public information; and if all public information is to be intercepted and inspected, time, resources, technology, etc. Look, it's a difficult task

Method used

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  • System and method for carrying out global information transmission by utilizing navigation satellite
  • System and method for carrying out global information transmission by utilizing navigation satellite
  • System and method for carrying out global information transmission by utilizing navigation satellite

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Embodiment Construction

[0042] Specific embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0043] 1. Basic technology

[0044] In order to better understand the present invention, the basic technologies involved in the present invention are first explained.

[0045] 1. Information hiding technology

[0046] Information hiding is usually regarded as a communication process, its input is the secret data to be transmitted, the public carrier data is transmitted in the channel, and the carrier data with hidden secret information is received.

[0047] The embedding algorithms for information hiding are divided into two categories: one is the lossless information hiding method (the information is lossless, and the carrier is also lossless), and the other is the lossy information hiding method (the information is lossless, the carrier has a certain loss). A typical lossy information hiding method is the spatial LSB (LeastSignific...

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Abstract

The invention relates to a system and method for carrying out global information transmission by utilizing a navigation satellite. Information transmission is carried out by utilizing the existing navigation telegraph message transmission system of the navigation satellite; on the premise of not changing a navigation telegraph message transmission format and a transmission rate, an information injection hidden transmitter is additionally arranged in the front of a navigation telegraph message transmitter; hidden transmission of user data is realized based on an information hiding method; normal use of a navigation positioning satellite system is not influenced; the practical functions of the navigation positioning satellite system are expanded; multiplexing of a navigation satellite channel is realized; a broadcast communication manner facing to the coverage area of the navigation satellite is also provided; by means of the system, any individual user can receive information through a commercial civilian navigation satellite user receiver; any hardware cost is nearly unnecessary; and for example, real-time and non-real-time text transmission and non-real-time image transmission can be provided in border areas, foreign travel areas, areas without other communication manners and areas, where communication manners are inconvenient to use.

Description

technical field [0001] The invention relates to a system and method for global information transmission using navigation satellites, belonging to the field of navigation and space communication. Background technique [0002] Satellite navigation is a method to accurately determine the position and time of any point on the earth through the Global Navigation Satellite System (GNSS). There are currently four major satellite navigation systems in the world, namely the GPS (Global Positioning System) system of the United States, the GLONASS (Global Navigation Satellite System) system of Russia, the Galileo (Galileo Positioning System) system of Europe and the BeiDou (COMPASS) Navigation Satellite System of China. [0003] GPS is the most widely used satellite navigation system in the world. Its research and development was proposed by the US Department of Defense for the purpose of high-precision navigation and positioning of various weapons such as vehicles, ships, aircraft and...

Claims

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Application Information

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IPC IPC(8): H04B7/185H04L29/06
CPCH04B7/1851H04L63/0428
Inventor 周诠冯新岗黎军李小军李晓博
Owner XIAN INSTITUE OF SPACE RADIO TECH
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