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High-reliability LDPC encoder suitable for satellite communication

A satellite communication and reliability technology, applied in error detection coding using multi-bit parity bits, error correction/detection using block codes, transmission systems, etc. Errors and other problems, to achieve the effect of enhancing the ability to resist single-event flipping, avoiding impact, and improving reliability and practicability

Inactive Publication Date: 2017-11-24
SHANGHAI SPACEFLIGHT INST OF TT&C & TELECOMM
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  • Application Information

AI Technical Summary

Problems solved by technology

During the running of the program, if the frame format of the front-end input data is wrong, the running rhythm of the local program will be disrupted, and continuous coding errors will be caused if it is not processed.

Method used

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  • High-reliability LDPC encoder suitable for satellite communication
  • High-reliability LDPC encoder suitable for satellite communication
  • High-reliability LDPC encoder suitable for satellite communication

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Embodiment Construction

[0021] In order to make the object, technical solution and advantages of the present invention clearer, various embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0022] Such as figure 1 Shown is the block diagram of the encoder interface and internal structure.

[0023] The input interface of the encoder includes clock signal, input data signal and power-on reset signal, the output interface includes I, Q data signal, and the encoded data is output to the modulator.

[0024] The internal structure of the encoder includes a data format judging module, a reset processing module, an LDPC encoding module, a framing and scrambling module and an output data switching module.

[0025] The data format judging module detects the correctness of the format of the input data (the location of the reserved verification data), the data with the correct format is sent to the encoding module for normal encoding, and the dat...

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Abstract

The invention discloses a high-reliability LDPC encoder suitable for satellite communication. The encoder comprises a data format judging module, a reset processing module, an encoding module, a frame scrambling module and an output data switching module. The encoder uses a 7 / 8 reduced code recommended by the CCSDS (consultative committee for space data system) standard, adopts a monolithic anti-fuse FPGA design, no additional configuration chip is needed, compared with the commonly used SRAM type FPGA, the high-reliability LDPC encoder has the advantages of simple structure and easy debugging; the data format judging module judges the format of the input data and is combined with the reset processing module for use, so that the encoder has the function of self recovery after receiving the error data; and by means of the combined use of periodic reset processing and fixed storage of G matrix data in the encoding module, the single event upset resistance of the encoder is improved.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, in particular to a high-reliability LDPC encoder suitable for satellite communication. Background technique [0002] As an effective means to ensure reliable transmission of information, channel coding technology is widely used in various communication systems. LDPC codes have error correction performance close to the Shannon limit, and become one of the error correction codes recommended by CCSDS for satellite communications. [0003] The space environment is full of protons, electrons, alpha particles and heavy ions from the universe. The radiation effect caused by space particles, especially the phenomenon of single event flipping, seriously threatens the safety of electronic equipment. At present, limited by device resources and other conditions, satellite communication LDPC encoders are mostly implemented by SRAM-type FPGAs, and logic functions are realized through SRAM config...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00H04B7/185H03M13/11
Inventor 田瑞甫陈劼李佳炜刘聚裴加军张朝路
Owner SHANGHAI SPACEFLIGHT INST OF TT&C & TELECOMM
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