On the Capacity of One-Sided Two User Gaussian Fading Broadcast Channels
On the Capacity of One-Sided Two User Gaussian Fading Broadcast Channels
复制标题
单侧二用户高斯衰落广播信道容量研究
DOI：
10.1109/glocom.2008.ecp.177
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发表时间：
2008
期刊：
影响因子：
--
通讯作者：
S. Vishwanath
中科院分区：
文献类型：
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作者：
A. Jafarian;S. Vishwanath
在本文中，我们研究了两个用户衰落广播信道容量的上限和下限，其中一个用户具有恒定（非衰落）信道。我们使用 Costa 熵幂不等式 (EPI) 以及优化框架来导出和容量的上限，并使用叠加编码来获得该通道的和速率的下限。对于一个信道恒定的衰落广播信道，我们发现在特殊情况下上限和下限满足，并且一般来说，我们表明可实现的总速率在外界的常数范围内。
In this paper, we investigate upper and lower bounds on the capacity of two-user fading broadcast channels where one of the users has a constant (non-fading) channel. We use the Costa entropy power inequality (EPI) along with an optimization framework to derive upper bounds on the sum-capacity and superposition coding to obtain lower bounds on the sum-rate for this channel. For this fading broadcast channel where one channel is constant, we find that the upper and lower bounds meet under special cases, and in general, we show that the achievable sum-rate comes within a constant of the outer bound.