基于IEEE 802.16的子信道分集对OFDMA系统性能的影响

2008 4th IEEE International Conference on Circuits and Systems for Communications Pub Date : 2008-05-26 DOI:10.1109/ICCSC.2008.12

M. Einhaus, B. Wolz, B. Walke

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引用次数: 7

摘要

基于OFDMA的移动无线电系统的性能取决于分配用于数据传输的逻辑子信道映射到频率信道的类型。这种映射方式既影响OFDMA子信道内部的分集，也影响OFDMA子信道之间的分集。本文通过随机事件驱动仿真，从MAC的角度比较了不同子信道映射的性能。详细研究了将子信道映射到分布子载波集和相邻子载波集的效果之间的权衡。效果是稳健的信噪比估计和可能的吞吐量增益由于频率自适应调度分别。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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The Influence of Subchannel Diversity on the Performance of OFDMA Systems Based on IEEE 802.16

The performance of a mobile radio system based on OFDMA is determined by the type of mapping of logical subchannels, which are allocated for data transmissions, onto the frequency channel. The mapping scheme affects the diversity both within and between the OFDMA subchannels. This paper provides a performance comparison of different subchannel mappings from MAC point of view by means of stochastic event- driven simulations. The tradeoff between the effects of mapping subchannels onto distributed and adjacent subcarrier sets are investigated in detail. The effects are robust SNR estimation and possible throughput gains due to frequency adaptive scheduling, respectively.

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2008 4th IEEE International Conference on Circuits and Systems for Communications

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