低轨卫星通信网络中HARQ技术研究

doi:10.11959/j.issn.2096-8930.2022047

Abstract

Abstract:

How to extend the HARQ technique to made it suitabled for LEO satellite communication network was explored.First the traditional HARQ technology was expounded.Based on this, the HARQ scheme based on low density parity check code (LDPC) and the HARQ scheme based on message group check code (BCC) were studied respectively, the performance of the schemes was analyzed through simulation.Finally, suitable feedback schemes were analyzed for the retransmission units in the HARQ retransmission mechanism, which provided some reference for the research of HARQ technology in LEO satellite communication networks.

Key words: low-orbit satellite network, HARQ, LDPC, BCC

CLC Number:

TN393

Runxin ZHANG, Shun ZHANG, Jianpeng MA, Jing ZHANG, Yunfei WU. Research on HARQ Technology in Low-Orbit Satellite Communication Network[J]. Space-Integrated-Ground Information Networks, 2022, 3(4): 92-100.

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References 18

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编码参数	参数值
CRC多项式选择	'24A'
CRC比特数	24 bit
码块数	2个
每个码块的校验比特数	24 bit
每个码块的“NULL”填充数	244个
扩展因子	240
分段后每个码块的比特数	5 280 bit
LDPC编码后每个码块的比特数	15 840 bit

编码参数	参数值
CRC多项式选择	'24A'
CRC比特数	24 bit
码块数	1个
每个码块的校验比特数	0 bit
每个码块的“NULL”填充数	256个
扩展因子	240
分段后每个码块的比特数	5 280 bit
LDPC编码后每个码块的比特数	15 840 bit

Research on HARQ Technology in Low-Orbit Satellite Communication Network

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