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arXiv 1407.8463cs.ITmath.IT
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基于计算转发的高斯多址接入

Gaussian Multiple Access via Compute-and-Forward

Jingge Zhu, Michael Gastpar

摘要:

计算和转发范式下使用的格码提出了标准高斯多址信道(MAC)的替代策略:接收器连续解码消息的整数线性组合,直到它可以反转和恢复所有消息。本文提出并分析了一种称为CFMA(计算前向多址接入)的多址接入技术。对于两个用户的MAC,它示出,没有时间共享,整个容量区域可以达到使用CFMA与单用户解码器,只要信号噪声比以上$1+\sqrt{2}$。对于两个以上的用户给出了部分分析。最后,该策略被扩展到所谓的脏MAC,其中两个干扰信号是已知的非因果关系的两个发射机在一个分布式的方式。我们的计划扩展了以前已知的结果,并给出了新的可实现的速率区域。

英文摘要:

Lattice codes used under the Compute-and-Forward paradigm suggest an alternative strategy for the standard Gaussian multiple-access channel (MAC): The receiver successively decodes integer linear combinations of the messages until it can invert and recover all messages. In this paper, a multiple-access technique called CFMA (Compute-Forward Multiple Access) is proposed and analyzed. For the two-user MAC, it is shown that without time-sharing, the entire capacity region can be attained using CFMA with a single-user decoder as soon as the signal-to-noise ratios are above $1+\sqrt{2}$. A partial analysis is given for more than two users. Lastly the strategy is extended to the so-called dirty MAC where two interfering signals are known non-causally to the two transmitters in a distributed fashion. Our scheme extends the previously known results and gives new achievable rate regions.

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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