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Multiaccess fading channels. II. Delay-limited capacities

机译:多路访问衰落信道。二。延迟限制容量

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For pt.I see ibid., vol.44, no.7, p.2796-815 (1998). In multiaccess wireless systems, dynamic allocation of resources such as transmit power, bandwidths, and rates is an important means to deal with the time-varying nature of the environment. We consider the problem of optimal resource allocation from an information-theoretic point of view. We focus on the multiaccess fading channel with Gaussian noise, and define two notions of capacity depending on whether the traffic is delay-sensitive or not. In the present paper, we introduce a notion of delay-limited capacity which is the maximum rate achievable with delay independent of how slow the fading is. We characterize the delay-limited capacity region of the multiaccess fading channel and the associated optimal resource allocation schemes. We show that successive decoding is optimal, and the optimal decoding order and power allocation can be found explicitly as a function of the fading states; this is a consequence of an underlying polymatroid structure that we exploit.
机译:关于第一部分,见同上,第44卷,第7期,第2796-815页(1998年)。在多址无线系统中,动态分配资源(例如发射功率,带宽和速率)是应对环境随时间变化的重要手段。我们从信息论的角度考虑资源优化分配的问题。我们将重点放在具有高斯噪声的多路接入衰落信道上,并根据通信量是否对延迟敏感来定义两个容量概念。在本文中,我们引入了时延限制容量的概念,它是与时延无关的衰落所能达到的最大速率。我们表征了多路接入衰落信道的时延限制容量区域以及相关的最佳资源分配方案。我们证明了连续解码是最优的,并且最优衰落状态的函数可以明确地找到最优解码顺序和功率分配。这是我们利用的潜在多类拟南芥结构的结果。

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