arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 1202.0589cs.ITmath.IT
收藏

基于大系统分析的蜂窝系统最小最大公平协调波束形成

Min-max fair coordinated beamforming in cellular systems via large systems analysis

Randa Zakhour, Stephen V. Hanly

摘要:

本文考虑基站(BS)协作的协调波束形成的形式,专注于最小-最大公平的功率使用目标SINR约束。我们表明,最佳波束形成策略有一个有趣的嵌套迫零结构。在渐近制度中,在每个基站的天线数量和每个小区的用户数量都增长大,其比例趋于一个有限的常数,优化的维数大大降低,只有统计知识是必需的解决它。最佳的解决方案的特点是一般的,并提出了一种算法,收敛到最佳的发射参数,为可行的SINR目标。对于两个细胞的情况下,一个简单的单参数表征。这些渐近结果提供了洞察的平均性能,以及简单而有效的波束形成策略的有限系统的情况下。特别地,来自大系统分析的最优波束形成策略仅要求基站具有本地瞬时信道状态信息;波束形成器的剩余参数可以使用可以容易地在基站之间共享的信道统计来计算。

英文摘要:

This paper considers base station (BS) cooperation in the form of coordinated beamforming, focusing on min-max fairness in the power usage subject to target SINR constraints. We show that the optimal beamforming strategies have an interesting nested zero-forcing structure. In the asymptotic regime where the number of antennas at each BS and the number of users in each cell both grow large with their ratio tending to a finite constant, the dimensionality of the optimization is greatly reduced, and only knowledge of statistics is required to solve it. The optimal solution is characterized in general, and an algorithm is proposed that converges to the optimal transmit parameters, for feasible SINR targets. For the two cell case, a simple single parameter characterization is obtained. These asymptotic results provide insights into the average performance, as well as simple but efficient beamforming strategies for the finite system case. In particular, the optimal beamforming strategy from the large systems analysis only requires the base stations to have local instantaneous channel state information; the remaining parameters of the beamformer can be calculated using channel statistics which can easily be shared amongst the base stations.

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。

↑