Performance of link adaptation algorithms and reconfigurable antennas for MIMO-OFDM wireless systems
Performance of link adaptation algorithms and reconfigurable antennas for MIMO-OFDM wireless systems
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DOI：
10.1109/ciss.2012.6310795
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发表时间：
2012-03
期刊：
影响因子：
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通讯作者：
George D. Sworo;M. Kam;K. Dandekar
中科院分区：
文献类型：
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作者：
George D. Sworo;M. Kam;K. Dandekar
在MIMO-OFDM无线系统中，通过使用自适应调制编码（AMC）和方向图可重构天线可以提高数据速率和信道容量。在本文中，我们提出了一个空间自适应调制和编码（SAMC）计划，分两个阶段进行操作。在第一，它搜索的最佳天线配置。然后，该技术基于由所选配置和附加系统约束产生的后处理信噪比（ppSNR）来应用AMC。AMC算法使用由ppSNR区域定义的固定链接表以获得可支持的频谱效率。在室内环境下的2×2 MIMO-OFDM无线系统中对该方案的性能进行了评估。
Data rates and channel capacity in MIMO-OFDM wireless systems can be improved through the use of Adaptive Modulation and Coding (AMC) and pattern reconfigurable antennas. In this paper, we propose a Spatially Adaptive Modulation and Coding (SAMC) scheme that operates in two stages. In the first, it searches for the optimal antenna configuration. Then, the technique applies AMC based on the post-processing Signal-to-Noise Ratio (ppSNR) yielded by the selected configuration and additional system constraints. The AMC algorithm uses fixed link tables defined by ppSNR regions for supportable spectral efficiencies. The performance of the proposed scheme in a 2×2 MIMO-OFDM wireless system in an indoor environment is evaluated.