arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1002.3188cs.ITmath.IT
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嘈杂的网络编码

Noisy Network Coding

Sung Hoon Lim, Young-Han Kim, Abbas El Gamal, Sae-Young Chung

摘要:

提出了一种在一般噪声网络上发送多个信源的噪声网络编码方案。对于多源多播网络,该计划自然扩展了Ahlswede,蔡,李,杨和无噪声网络上的网络编码,并由盖和El Gamal的中继信道的压缩-转发编码一般离散无记忆和高斯网络。该方案还恢复作为特殊情况下的结果编码的无线中继网络和确定性网络的Avestimehr,Diggavi和谢,和编码的无线擦除网络的Dana,Gowaikar,Palanki,Hassibi和Effros。该方案包括消息重复编码、中继信号压缩和同时解码。与在多个块上发送独立消息的先前的压缩-转发方案不同,使用独立码本多次发送相同的消息,如在用于循环网络的网络编码方案中。此外,中继器不像在先前的压缩-转发方案中那样使用Wyner-Ziv分箱,并且每个解码器对来自所有块的接收信号执行同时的联合典型性解码,而不显式地解码压缩索引。这个新方案的一个结果是,证明简单,更一般,而不诉诸时间扩展扩展无环网络的结果与周期的网络。噪声网络编码方案,然后扩展到一般的多源网络,通过将其与干扰信道的解码技术相结合。对于高斯多播网络,噪声网络编码提高了先前建立的割集界的差距。我们还通过两个流行的AWGN网络的例子证明,噪声网络编码可以优于传统的压缩转发,放大转发和哈希转发方案。

英文摘要:

A noisy network coding scheme for sending multiple sources over a general noisy network is presented. For multi-source multicast networks, the scheme naturally extends both network coding over noiseless networks by Ahlswede, Cai, Li, and Yeung, and compress-forward coding for the relay channel by Cover and El Gamal to general discrete memoryless and Gaussian networks. The scheme also recovers as special cases the results on coding for wireless relay networks and deterministic networks by Avestimehr, Diggavi, and Tse, and coding for wireless erasure networks by Dana, Gowaikar, Palanki, Hassibi, and Effros. The scheme involves message repetition coding, relay signal compression, and simultaneous decoding. Unlike previous compress--forward schemes, where independent messages are sent over multiple blocks, the same message is sent multiple times using independent codebooks as in the network coding scheme for cyclic networks. Furthermore, the relays do not use Wyner--Ziv binning as in previous compress-forward schemes, and each decoder performs simultaneous joint typicality decoding on the received signals from all the blocks without explicitly decoding the compression indices. A consequence of this new scheme is that achievability is proved simply and more generally without resorting to time expansion to extend results for acyclic networks to networks with cycles. The noisy network coding scheme is then extended to general multi-source networks by combining it with decoding techniques for interference channels. For the Gaussian multicast network, noisy network coding improves the previously established gap to the cutset bound. We also demonstrate through two popular AWGN network examples that noisy network coding can outperform conventional compress-forward, amplify-forward, and hash-forward schemes.

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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