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An Adaptive Double Binary Turbo Coding and Decoding Method Based on dvb-rcs Standard

A dual binary, self-adaptive technology, applied in the field of channel coding, can solve problems such as poor communication conditions, waste of space resources, and impact on communication quality, and achieve good promotion and application value, flexible use of space, and high portability.

Active Publication Date: 2021-08-31
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0035] To sum up, in the existing DVB-RCS standard dual binary turbo code coding technology, there is no adaptive code rate adjustment related technology, resulting in the fact that in actual communication, the use of low code rate turbo codes in good communication conditions may waste space resources and communication. The problem that the use of high bit rate Turbo codes affects the quality of communication under harsh conditions

Method used

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  • An Adaptive Double Binary Turbo Coding and Decoding Method Based on dvb-rcs Standard
  • An Adaptive Double Binary Turbo Coding and Decoding Method Based on dvb-rcs Standard
  • An Adaptive Double Binary Turbo Coding and Decoding Method Based on dvb-rcs Standard

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Embodiment 1

[0097] An adaptive dual-binary Turbo encoding and decoding method based on the DVB-RCS standard. This embodiment takes a large ocean-going company's ship going out to sea to communicate with the headquarters of a land company as an example. The ship is equipped with a VSAT satellite communication terminal. The TDMA signal sent by the RCST station of the ship is transparently transmitted to the receiving station of the land company through a satellite, and the DVB signal sent by the land company is transparently transmitted to the RCST station of the ship through a satellite to complete the duplex communication. . The method of this embodiment is applied in the return link of the VSAT satellite communication system, and the operation block diagram of the VSAT satellite communication system is as follows figure 1 As shown, the VSAT satellite communication system includes the main station equipment, communication satellites and RCST small station equipment, and the communication ...

Embodiment 2

[0150] According to a kind of adaptive double binary Turbo code encoding and decoding method based on DVB-RCS standard described in embodiment 1, its difference is:

[0151] In step (5), the value of CRC check is calculated by the byte look-up table method, and the value of CRC check is the CRC value, and the steps are as follows:

[0152] m, generate the CRC value table of 8-bit binary number, the value range of 8-bit binary number is 0-255, add 16 bits 0 after this number and form 24 bit data altogether, this 24-bit data is divided by generating polynomial, obtains The 16-bit remainder value is the CRC value,

[0153] n. Calculate the CRC value by the way of byte lookup table. According to the CRC value table, perform operations byte by byte. The CRC value is subjected to a modulo two addition operation until the last byte is calculated to obtain the final CRC value.

[0154] Described step B, Turbo code decoding, comprises steps as follows:

[0155] The present invention...

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Abstract

The present invention relates to a kind of self-adaptive dual-binary turbo code encoding and decoding method based on DVB-RCS standard, relates to double-binary Turbo code coding in DVB-RCS standard satellite communication system return link RCST (Return Channel Satellite Terminal) small station Structure, interleaving algorithm, selection of puncturing pattern, Max‑Log‑MAP soft input and soft output decoding algorithm, CRC check, etc. The present invention calculates the CRC passing rate of the 100-frame data decoded by the receiving end in real time, generates a code rate adjustment factor, and feeds it back to the sending end to adjust the encoding code rate, so as to realize the optimization of the Turbo code rate and information transmission efficiency.

Description

technical field [0001] The invention relates to a DVB-RCS standard-based self-adaptive dual-binary Turbo code encoding and decoding method, which belongs to the technical field of channel encoding. Background technique [0002] VSAT (Very Small Aperture Terminal) refers to a satellite transmission system with an antenna diameter less than 2.4 meters and composed of a large number of earth stations. It can be directly installed at the user's place, so that the satellite communication can be directly oriented to the user or individual. Can provide high-quality voice, data, images and other integrated services. It is an important part of modern satellite communication and one of the important development directions of modern satellite communication. [0003] DVB-RCS is ETSI (European Telecommunications Standards Institute, European Telecommunications Standards Institute), according to the characteristics of satellite communications, launched a set of industry standards that c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03M13/29H03M13/27
CPCH03M13/2771H03M13/2957
Inventor 姜威李兴包丞啸王玉潇
Owner SHANDONG UNIV
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