| 摘要: |
| 针对传统的反馈机制在低信噪比多跳中继通信中时延较高的问题，提出了一种适用于低信噪比场景下多跳中继通信的编码传输方案。该方案在已构建的多跳中继模型上，通过马尔科夫链分析传输时间与编码参数的关系，并结合信道条件优化编码参数，以获取较短的传输时间。在编码参数的优化过程中，提出了“ε初始”搜索算法。该算法调整搜索的顺序，以提高搜索效率。仿真结果表明，在低信噪比多跳通信中，该方案有较短的传输时间，同时其优化算法也降低了计算量。 |
| 关键词: 中继通信 低时延通信 网络编码 稀疏编码 |
| DOI： |
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| 基金项目:国家自然科学基金资助项目(61871241,61771263) |
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| A multi-hop relay transmission scheme based on network coding in low SNR condition |
| CHEN Chao,ZHANG Shibing,LI Ye |
| (School of Information Science and Technology,Nantong University,Nantong 226019,China) |
| Abstract: |
| Multi-hop relay communication based on conventional feedback mechanism has the higher latency in low signal-to-noise ratio(SNR) condition.To solve the problem,a coded transmission scheme is proposed for multi-hop relay communication in low SNR condition.According to the established multi-hop relay model,the relationship between transmission time and coding parameters is analyzed by Markov chain.Then coding parameters are optimized to obtain the shorter transmission time according to the channel conditions.In the optimization of coding parameters,the “ε-start” search algorithm is proposed,which adjusts the search orientation to improve search efficiency.The simulation results show that the scheme has the shorter transmission time in low SNR multi-hop communication,and the optimization algorithm reduces the computation in the meantime. |
| Key words: relay communication low latency communication network coding sparse coding |
《电讯技术》编辑部 