中文

具有未知信道分布和不准确信道状态信息的MIMO衰落系统中的动态发射协方差设计

信息论 2017-04-19 v3 math.IT

摘要

本文考虑在受长期和短期功率约束的点对点MIMO衰落系统中,具有未知信道状态分布和不准确信道状态信息的动态发射协方差设计。首先,处理发射端具有瞬时但可能不准确的信道状态信息(CSIT)的情况。通过扩展漂移加惩罚技术,提出了一种动态发射协方差策略,并证明其以O(delta)O(delta)的差距逼近最优性,其中δ\delta为CSIT的不准确度度量,且与信道状态分布无关且不需要该分布的知识。接下来,考虑延迟且不准确的信道状态信息的情况。在这种情况下,最大化遍历容量的最优发射协方差解根本不同,并开发了另一种基于凸投影的在线算法。针对这种延迟CSIT情况所提出的算法同样具有O(delta)O(delta)的最优性差距,其中δ\delta同样是CSIT的不准确度度量。

关键词

引用

@article{arxiv.1512.08419,
  title  = {Dynamic Transmit Covariance Design in MIMO Fading Systems With Unknown Channel Distributions and Inaccurate Channel State Information},
  author = {Hao Yu and Michael J. Neely},
  journal= {arXiv preprint arXiv:1512.08419},
  year   = {2017}
}

备注

This paper extends our INFOCOM 2016 paper (see comments in v2 for extension) and its short version will appear in IEEE Transactions on Wireless Communications. Note that a constant coefficient in Theorem 4 of INFOCOM 2016 paper was incorrectly given and is corrected in footnote 6 in this paper.(However, this minor error does not affect any other results or conclusions in INFOCOM 2016 paper.)