arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1005.0855cs.ITmath.IT
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基于信息论的水下网络容量扩展研究

On Capacity Scaling of Underwater Networks: An Information-Theoretic Perspective

Won-Yong Shin, Daniel E. Lucani, Muriel Medard, Milica Stojanovic, Vahid Tarokh

摘要:

分析了$n$节点规则分布在正方形上的水声网络的容量缩放定律。假设窄带模型,其中允许载波频率作为$n$的函数缩放。在网络中,我们表征的衰减参数,取决于频率缩放以及传输距离。在扩展网络中的吞吐量缩放的割集上界,然后推导出。我们的结果表明,上界是成反比的衰减参数,从而导致在一个高度功率限制的网络。有趣的是,可以看出,与无线电网络的情况不同,我们的上限本质上与衰减参数有关,但不是扩频因子。此外,我们描述了一个可实现的方案的基础上简单的最近邻多跳(MH)传输。它示出在扩展网络的MH计划是阶最优的衰减参数的规模与$\sqrt{n}$(或更快)呈指数。最后,这些缩放结果扩展到一个随机网络实现。

英文摘要:

Capacity scaling laws are analyzed in an underwater acoustic network with $n$ regularly located nodes on a square. A narrow-band model is assumed where the carrier frequency is allowed to scale as a function of $n$. In the network, we characterize an attenuation parameter that depends on the frequency scaling as well as the transmission distance. A cut-set upper bound on the throughput scaling is then derived in extended networks. Our result indicates that the upper bound is inversely proportional to the attenuation parameter, thus resulting in a highly power-limited network. Interestingly, it is seen that unlike the case of wireless radio networks, our upper bound is intrinsically related to the attenuation parameter but not the spreading factor. Furthermore, we describe an achievable scheme based on the simple nearest neighbor multi-hop (MH) transmission. It is shown under extended networks that the MH scheme is order-optimal as the attenuation parameter scales exponentially with $\sqrt{n}$ (or faster). Finally, these scaling results are extended to a random network realization.

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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