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Power Control and Performance Analysis of Outage-Limited Cellular Network with MUD-SIC and Macro-Diversity

机译:停电限制蜂窝电源的功率控制与性能分析   具有mUD-sIC和宏观多样性的网络

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摘要

In this paper, we analyze the uplink goodput (bits/sec/Hz successfullydecoded) and per-user packet outage in a cellular network using multi-userdetection with successive interference cancellation (MUD-SIC). We considernon-ergodic fading channels where microscopic fading channel information is notavailable at the transmitters. As a result, packet outage occurs whenever thedata rate of packet transmissions exceeds the instantaneous mutual informationeven if powerful channel coding is applied for protection. We are interested tostudy the role of macro-diversity (MDiv) between multiple base stations on theMUD-SIC performance where the effect of potential error-propagation during theSIC processing is taken into account. While the jointly optimal power anddecoding order in the MUD-SIC are NP hard problem, we derive a simple on/offpower control and asymptotically optimal decoding order with respect to thetransmit power. Based on the information theoretical framework, we derive theclosed-form expressions on the total system goodput as well as the per-userpacket outage probability. We show that the system goodput does not scale withSNR due to mutual interference in the SIC process and macro-diversity (MDiv)could alleviate the problem and benefit to the system goodput.
机译:在本文中,我们使用具有连续干扰消除(MUD-SIC)的多用户检测功能,分析了蜂窝网络中的上行链路吞吐量(成功解码的位/秒/ Hz)和每用户分组中断。我们考虑非遍历衰落信道,其中在发射机处没有微观衰落信道信息。结果,每当分组传输的数据速率超过瞬时互信息时,即使将强大的信道编码用于保护,也会发生分组中断。我们感兴趣的是研究了多个基站之间的宏分集(MDiv)在MUD-SIC性能上的作用,其中考虑了SIC处理期间潜在的错误传播的影响。尽管MUD-SIC中的联合最优功率和解码顺序是NP难题,但我们推导了一个简单的开/关功率控制和关于发射功率的渐近最优解码顺序。基于信息理论框架,我们得出了系统总吞吐量以及每个用户数据包中断概率的闭式表达式。我们表明,由于SIC过程中的相互干扰,系统吞吐量无法随SNR缩放,并且宏分集(MDiv)可以缓解此问题,并有益于系统吞吐量。

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