A Construction Method of LDPC Codes for Space Optical Communications Based on Protograph

Qian Hua Zhang; Jian Wu Zhang

doi:10.4028/www.scientific.net/AMM.631-632.791

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 631-632A Construction Method of LDPC Codes for Space...

A Construction Method of LDPC Codes for Space Optical Communications Based on Protograph

Abstract:

In order to meet the requirements of low bit error-rate of the channel code in the space optical communication system, a construction method of low density parity check ( LDPC) codes with excellent performance is proposed based on protograph and quasi-cyclic expansion. It can be applied in high-speed encoding and decoding with efficient quasi-cyclic expansion. According to the proposed method, a LDPC ( 8832, 1472) suitable for the space optical communication system is constructed, in which the LDPC codes of the protograph perform very well. Simulation shows that the LDPC codes have superior error-correction performance and show no sign of error floor when the BER is in the order of 10-9, which are suitable for the long-distance space optical communication systems.

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Periodical:

Applied Mechanics and Materials (Volumes 631-632)

Pages:

791-794

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.631-632.791

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Online since:

September 2014

Authors:

Qian Hua Zhang*, Jian Wu Zhang

Keywords:

Free Space Optical Communications (FSOC), LDPC, Protograph, Quasi-Cyclic Expansion

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* - Corresponding Author

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