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Common software decoding data distribution method applied to satellite communication

A general-purpose software and data distribution technology, which is applied in the field of satellite communication, can solve problems such as low efficiency, complex LDPC code interleaving network, and less research on LDPC code general-purpose programming technology, and achieve the effect of easy writing

Active Publication Date: 2012-06-27
SPACE STAR TECH CO LTD
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Problems solved by technology

[0004] At present, although there are many researches on LDPC technology at home and abroad, there are few researches on general programming technology for LDPC codes, and the interleaving network in the decoding process of LDPC codes is extremely complex.
Usually, once the H matrix of the LDPC code is transformed, the entire program needs to be rewritten, which is inefficient and cannot meet the needs of the current large-scale tasks in the aerospace field.

Method used

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  • Common software decoding data distribution method applied to satellite communication
  • Common software decoding data distribution method applied to satellite communication
  • Common software decoding data distribution method applied to satellite communication

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Embodiment Construction

[0021] The invention performs LDPC code initialization, horizontal operation and vertical operation on the demodulated data of the ground receiving equipment, and obtains the data decoded and processed by using the LDPC code. The data allocation process of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0022] First, the known conditions required for decoding are explained:

[0023] a) The size of each cyclic sub-matrix in the check matrix H (stored in sub_N, usually the size of all cyclic sub-matrices is the same)

[0024] b) There are several groups of "1" in each cyclic sub-matrix in the parity check matrix H (3 groups in the example, set as A, B, C,)

[0025] c) The column number starting from each group "1" in each cyclic sub-matrix in the parity check matrix H (stored in ver_pos_A, ver_pos_B and ver_pos_C)

[0026] Then, according to the initial column number of each group of "1", calculate the row number of the ...

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Abstract

The invention relates to a common software decoding data distribution method applied to satellite communication, which comprises the following steps of: carrying out initialization, horizontal operation and vertical operation of an LDPC (Low Density Parity Check) code on data demodulated by ground receiving equipment, and obtaining data processed by decoding the LDPC code. The common software decoding data distribution method has high efficiency, realizes the aim of universalization, and meets the requirement of large amount of tasks in the present aerospace field.

Description

technical field [0001] The invention relates to a general software decoding data distribution method applied to satellite communication, which belongs to the technical field of satellite communication. Background technique [0002] With the increasing frequency of space exploration activities and the rapid increase in the amount of data generated by near-earth and deep-space exploration, people urgently need a coding and decoding technology that can transmit high-speed and accurate data across distant space. Due to the long transmission distance, complex channel environment, and the requirement of real-time transmission of large amounts of data in many projects, high gain requirements are put forward for this encoding and decoding technology. [0003] LDPC code is a good code with performance close to the Shannon limit. The LDPC code standard for near-Earth communication and deep space exploration has been adopted by NASA in 2009. The error platform of LDPC code is lower tha...

Claims

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Application Information

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IPC IPC(8): H04L1/00
Inventor 王健张拯宁郑晓天
Owner SPACE STAR TECH CO LTD
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