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arXiv 1301.2613cs.ITmath.IT
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异构多小区OFDMA网络中异构部分反馈设计的分析框架

An Analytical Framework for Heterogeneous Partial Feedback Design in Heterogeneous Multicell OFDMA Networks

Yichao Huang, Bhaskar D. Rao

摘要:

用户密度和大规模信道效应导致的固有异构结构促使异构网络中的异构部分反馈设计。在这种新兴的网络中,分布式调度策略,享受多用户分集,以及维护用户之间的公平性是有利于个人用户速率的提高和保证。对于一个系统采用基于累积分布函数的调度,它满足上述两个所需的功能,我们开发了一个分析框架,调查异构部分反馈在一个一般的基于OFDMA的异构多小区采用最佳M部分反馈策略。首先进行精确的和速率分析,并通过对所选用户的信号与干扰加噪声比的概率密度函数进行新的分解,获得闭合形式的表达式。为了进一步了解,我们使用极值理论进行渐近分析,以检查部分反馈的多用户多样性的随机性的影响,显示最佳1反馈的渐近最优性,并推导出一个渐近近似的总和率,以确定最小所需的部分反馈。

英文摘要:

The inherent heterogeneous structure resulting from user densities and large scale channel effects motivates heterogeneous partial feedback design in heterogeneous networks. In such emerging networks, a distributed scheduling policy which enjoys multiuser diversity as well as maintains fairness among users is favored for individual user rate enhancement and guarantees. For a system employing the cumulative distribution function based scheduling, which satisfies the two above mentioned desired features, we develop an analytical framework to investigate heterogeneous partial feedback in a general OFDMA-based heterogeneous multicell employing the best-M partial feedback strategy. Exact sum rate analysis is first carried out and closed form expressions are obtained by a novel decomposition of the probability density function of the selected user's signal-to-interference-plus-noise ratio. To draw further insight, we perform asymptotic analysis using extreme value theory to examine the effect of partial feedback on the randomness of multiuser diversity, show the asymptotic optimality of best-1 feedback, and derive an asymptotic approximation for the sum rate in order to determine the minimum required partial feedback.

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。

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