Coding Across Finite Transport Blocks in Modern Wireless Communication Systems
Coding Across Finite Transport Blocks in Modern Wireless Communication Systems
复制标题
现代无线通信系统中跨有限传输块的编码
DOI：
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发表时间：
2014
影响因子：
8.3
通讯作者：
E. Perrins
中科院分区：
文献类型：
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作者：
Cenk Sahin;Lingjia Liu;E. Perrins
未来无线通信将面临双重挑战，即支持大流量的同时为各类对延迟敏感的业务提供可靠服务。鉴于这一挑战，本文研究了在仅接收端知晓信道状态序列的情况下，基于有限传输块（TBs）进行信道编码的无线通信系统的吞吐量性能。当我们跨多个传输块应用编码时，底层无线信道可有效地建模为有限状态马尔可夫链。通过将底层物理信道的特性与马尔可夫链的参数相联系，我们描述了相应系统的信道离散度。然后，信道离散度被用于评估各种通信策略的编码性能。我们还提出了一种通信方案，其中接收端根据可用的信道状态序列确定解码时间。数值结果表明，所提出的方案显著降低了编码延迟，以实现接近信道容量的速率。
Future wireless communications will face the dual challenge of supporting large traffic volume while providing reliable service for various kinds of delay-sensitive traffic. In light of this challenge, this paper investigates the throughput performance of wireless communication systems under channel coding over finite transport blocks (TBs) with the channel state sequence available only at the receiver. When we apply coding across multiple TBs, the underlying wireless channel can be effectively modeled as a finite-state Markov chain. By linking the characteristics of the underlying physical channel to the parameters of the Markov chain, we characterize the channel dispersion of the corresponding system. The channel dispersion is then used to assess the coding performance of various communication strategies. We also propose a communication scheme where the receiver determines the decoding time based on the available channel state sequence. Numerical results show that the proposed scheme significantly reduces the coding delay to achieve rates near the channel capacity.