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Navigation Signal Communication Method Based on Digital Watermarking and Compressed Sensing

A navigation signal and compressed sensing technology, applied in the field of information processing, can solve the problems of high requirements on storage devices and high pressure on the transmission system, and achieve the effect of overcoming security restrictions, reducing pressure, and reducing the amount of data transmission

Inactive Publication Date: 2016-04-13
XIDIAN UNIV
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  • Application Information

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Problems solved by technology

When a large amount of data is transmitted, the pressure on the transmission system is greater, and the requirements for storage devices are higher

Method used

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  • Navigation Signal Communication Method Based on Digital Watermarking and Compressed Sensing
  • Navigation Signal Communication Method Based on Digital Watermarking and Compressed Sensing
  • Navigation Signal Communication Method Based on Digital Watermarking and Compressed Sensing

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Embodiment Construction

[0033] The present invention completes the concealment of navigation signals through digital watermarking technology to meet the security requirements of information; through the introduction of compressed sensing technology, it reduces the amount of data transmission and system hardware overhead; relying on these two technologies, the safety of navigation signals is improved , while greatly reducing the amount of data on the transmission link, which will be further described in detail with reference to the accompanying drawings.

[0034] refer to figure 1 , the implementation of the present invention includes two parts: hiding and sending the on-board navigation signal and recovering the navigation signal from the received information on the ground.

[0035] 1. Concealment and transmission of on-board navigation signals

[0036] refer to figure 2 , the implementation steps of this part are as follows:

[0037] Step 1: Spectrum spreading is performed on the original naviga...

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Abstract

The invention discloses a navigation signal communication method based on digital watermarking and compressed sensing. The problems that communication safety is restricted and the transmission data size is large in the prior art are mainly solved. The method includes the steps that spectrum spreading is conducted on a navigation signal so that a target signal can be obtained, the target signal is hidden in a medium frequency coefficient of a selected carrier image through the digital watermarking technology, and a random sequence for spectrum spreading of the navigation signal and the hidden position in the carrier image are recorded to be set as a secret key; the watermarking image with the hidden navigation signal is compressed and measured through the compressed sensing technology, so that a small amount of data are obtained, and the data are used for replacing the watermarking image for transmission; the watermarking image with hidden navigation information is recovered in a high probability mode from the small amount of data which are obtained through demodulation and dispreading after receiving through the compressed sensing technology, the target signal is resolved through the recorded secret key, and finally the navigation signal is further resolved through a correlation operation. The navigation signal communication method based on digital watermarking and compressed sensing effectively reduces the data size in the transmitting process and can be used for safety communication of navigation signals.

Description

technical field [0001] The invention belongs to the technical field of information processing, and in particular relates to a signal hiding and communication method, which can be used for safe communication of navigation signals. technical background [0002] The Global Navigation Satellite System (GNSS) provides high-precision, all-weather position, velocity and time information for an unlimited number of users on the earth's surface or in near-Earth space, achieving global coverage and high-precision positioning. With the advent of the 21st century, the GNSS system has entered a substantive stage of operation, and its application has penetrated into all walks of life. GNSS system, with its good performance and wide application, has gradually had a huge impact in the fields of politics, economy, military and other fields, and has become a key technology related to the national economy and people's livelihood. It is not only related to national security and economic construc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S19/37
CPCG01S19/09
Inventor 冯冬竹袁晓光何晓川佘颜许录平曾吉付达
Owner XIDIAN UNIV
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