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arXiv 1405.4375cs.ITmath.ITmath.NT
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无线分布式存储系统中的代数码和一种新的物理层传输协议

Algebraic Codes and a New Physical Layer Transmission Protocol for Wireless Distributed Storage Systems

Amaro Barreal, Camilla Hollanti, David Karpuk, Hsiao-feng Lu

摘要:

在无线存储系统中,必须通过衰落信道进行通信使得修复传输易于发生物理层错误。对抗衰落的第一种方法是利用现有的最优空时码。然而,最近指出,当辅助节点的数量大于新节点或数据收集器处的天线数量时,这种代码通常太复杂而无法解码。本文提出了一种基于代数空时码的无线存储传输协议,以提高系统的可靠性,同时使可行的解码。分集复用增益权衡(DMT)的系统连同球解码,即使与低数量的天线被用作主要的设计标准,从而自然地建立一个DMT的复杂性权衡。结果表明,该协议优于简单的时分多址(TDMA)协议,而仍然落后于最佳DMT。

英文摘要:

In a wireless storage system, having to communicate over a fading channel makes repair transmissions prone to physical layer errors. The first approach to combat fading is to utilize the existing optimal space-time codes. However, it was recently pointed out that such codes are in general too complex to decode when the number of helper nodes is bigger than the number of antennas at the newcomer or data collector. In this paper, a novel protocol for wireless storage transmissions based on algebraic space-time codes is presented in order to improve the system reliability while enabling feasible decoding. The diversity-multiplexing gain tradeoff (DMT) of the system together with sphere-decodability even with low number of antennas are used as the main design criteria, thus naturally establishing a DMT-complexity tradeoff. It is shown that the proposed protocol outperforms the simple time-division multiple access (TDMA) protocol, while still falling behind the optimal DMT.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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