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Rate-Compatible Shortened LDPC Codes for Deep Space Fading Channel

Kanchanut Hormsup, Virasit Imtawil, and Puripong Suthisopapan
Department of Electrical Engineering, Khon Kaen University, Thailand

Abstract—Accumulate-Repeat-4-Jagged-Accumulate (AR4JA) code is the special class of LDPC codes which has great error correcting capability for deep space communications. Nevertheless, it is quite not suitable to create rate-compatible scheme from AR4JA code due to its high decoder implementation complexity. This paper presents the construction of rate-compatible shortened LDPC codes for deep space application which can facilitate the decoder implementation. The high rate regular quasi-cyclic LDPC code which has low implementation complexity is utilized to construct the rate-compatible code. According to the parameters from CCSDS standards, simulation results show that the proposed rate-compatible codes exhibit the BER performance almost identical to the well-designed AR4JA codes at any code rate under deep space environment modelled by Rician fading channel.

Index Terms—LDPC codes, rate-compatible codes, deep space communications, Rician fading channel

Cite: Kanchanut Hormsup, Virasit Imtawil, and Puripong Suthisopapan, "Rate-Compatible Shortened LDPC Codes for Deep Space Fading Channel," Journal of Communications, vol. 14, no. 7, pp. 574-579, 2019. Doi: 10.12720/jcm.14.7.574-579