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Compression implementation method for Beidou satellite information transmission

A Beidou satellite and information transmission technology, which is applied in the field of satellite navigation and communication, can solve the problems of transmission efficiency limitation, achieve the effect of improving efficiency, reducing the risk rate of packet loss, and improving the compression rate

Active Publication Date: 2018-01-09
广州祺智通信科技股份有限公司
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Problems solved by technology

[0012] In the era of big data, Beidou transmission is also widely used in earthquake relief, marine fishery, forest fire prevention, transportation, water conservancy and electric power, etc. problem, but the transmission efficiency will also be limited, how to effectively compress large data to reduce the transmission frame, thereby improving the efficiency of data transmission

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  • Compression implementation method for Beidou satellite information transmission
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  • Compression implementation method for Beidou satellite information transmission

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Embodiment

[0044] The present invention adopts two methods to improve the compression mode of ordinary short messages, the first one is a one-byte substitution method, and the second is a binary substitution method.

[0045]First of all, the number of Chinese characters is amazing. The commonly used "Xinhua Dictionary" has more than 10,000 Chinese characters; "Ci Hai" published in 1990 has 14,872 Chinese characters; "Kangxi Dictionary" compiled in 1716 has 47,035 Chinese characters; Guo Moruo According to the estimates of Japanese friends during his lifetime, there are about 60,000 Chinese characters in our country; the "Chinese Character Sea" published in 1994 has 87,019 Chinese characters (including 320 repeated characters); recently, according to Beijing Guoan Information Equipment Co., Ltd. The Chinese character library contains 91,251 Chinese characters with provenance. GBK’s Chinese character national standard extension code basically adopts all the Chinese characters and code point...

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Abstract

The invention relates to a compression implementation method for Beidou satellite information transmission. The method includes the steps of compiling a compression dictionary, and arranging content to be transmitted according to serial numbers or performing encoding through a binary system in the compression dictionary; splitting content after extraction, and when the content is Chinese, searching a Chinese dictionary to obtain corresponding Chinese words through matching, otherwise searching English, digital and symbol dictionaries; after word segmentation is performed on the content to be transmitted, inputting a final word segmentation result; performing indexing of the compressed dictionary on the split content, performing encoding to obtain a compressed short message and sending outthe compressed short message; and extracting received content, if it is judged that the content is not character table content, extracting one more byte backward, inquiring the compressed dictionary after forming two bytes, and after all byte content is converted, outputting and displaying all the byte content. According to the compression implementation method for Beidou satellite information transmission, through customization of the compressed dictionary, encoding compression is performed on the short message content, and expansion is performed within a limited byte number, thereby improving transmission speed of Beidou RD communication and increasing transmission content.

Description

technical field [0001] The invention relates to the field of satellite navigation and communication, in particular to a method for realizing compression of Beidou satellite information transmission. Background technique [0002] The Beidou satellite navigation system is a regional satellite navigation system independently developed by my country. The system covers the entire territory of my country and surrounding countries. The whole system consists of three parts: sky satellites, ground control stations and user application terminals. The user application terminal has the functions of positioning, navigation and short message data communication, and has a wide range of applications in the fields of positioning, navigation and communication. [0003] With the progress and development of society and science and technology, the satellite system has been gradually integrated into social life, and because of the Beidou system has a unique short message communication function, d...

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Application Information

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IPC IPC(8): G01S19/37G01S19/03H03M7/30H03M7/04
Inventor 焦明辉冯毅华吴东发李海鸿范扬军
Owner 广州祺智通信科技股份有限公司
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