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arXiv 1403.7679cs.ITmath.IT
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编码分布式分集:一种新的无线通信系统分布式接收技术

Coded Distributed Diversity: A Novel Distributed Reception Technique for Wireless Communication Systems

Junil Choi, David J. Love, Patrick Bidigare

摘要:

在本文中,我们考虑一个分布式接收的情况下,一个发射机广播信号到多个地理上分离的接收节点在衰落信道,每个节点转发几个比特表示处理版本的接收信号的融合中心。然后,融合中心尝试基于来自接收节点的转发信息和可能的信道状态信息来解码所发送的信号。我们发现,有一个很强的连接之间的问题,最小化的符号错误概率在融合中心的分布式接收和信道编码的编码理论。这种连接使我们能够设计一个统一的框架编码分布式分集接收。我们专注于线性分组码,如单纯形码或一阶Reed-Muller码,实现Griesmer界与平等,以最大限度地提高分集增益。由于其结构简单,不需要复杂的离线优化过程来设计所提出的编码分集技术在接收节点处的编码结构。所提出的技术可以支持广泛的分布式接收场景,即,发射机处的任意$M$元符号传输以及接收节点处的多比特接收信号处理。数值研究表明,所提出的编码分集技术可以实现实用的符号出错率,即使在中等的信噪比和接收节点的数量。

英文摘要:

In this paper, we consider a distributed reception scenario where a transmitter broadcasts a signal to multiple geographically separated receive nodes over fading channels, and each node forwards a few bits representing a processed version of the received signal to a fusion center. The fusion center then tries to decode the transmitted signal based on the forwarded information from the receive nodes and possible channel state information. We show that there is a strong connection between the problem of minimizing a symbol error probability at the fusion center in distributed reception and channel coding in coding theory. This connection allows us to design a unified framework for coded distributed diversity reception. We focus linear block codes such as simplex codes or first-order Reed-Muller codes that achieve the Griesmer bound with equality to maximize the diversity gain. Due to its simple structure, no complex offline optimization process is needed to design the coding structure at the receive nodes for the proposed coded diversity technique. The proposed technique can support a wide array of distributed reception scenarios, i.e., arbitrary $M$-ary symbol transmission at the transmitter and received signal processing with multiple bits at the receive nodes. Numerical studies show that the proposed coded diversity technique can achieve practical symbol error rates even with moderate signal-to-noise ratio and numbers of the receive nodes.

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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