Reconfigurable Antennas, Preemptive Switching and Virtual Channel Management
Reconfigurable Antennas, Preemptive Switching and Virtual Channel Management
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DOI：
10.1109/tcomm.2014.020514.130592
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发表时间：
2012-11
影响因子：
8.3
通讯作者：
Santhosh Kumar;J. Chamberland;G. Huff
中科院分区：
文献类型：
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作者：
Santhosh Kumar;J. Chamberland;G. Huff
本文考虑了使用可重构天线或方向图动态天线的无线通信系统的性能。重点放在有记忆的有限状态通道上，并根据实时行为来评估性能。在无线环境中，当慢衰落信道进入深度衰落时，相应的通信系统在目的地面临连续译码失败的威胁。在这种情况下，迅速走出深度衰退成为当务之急。快速可重构天线的最新进展提供了改变衰落信道的统计分布的新方法，从而降低了长时间衰落的概率。因此，快速可重新配置天线有望提高整体性能，特别是对于慢衰落环境中对延迟敏感的业务。这种增强性能的潜力激发了对具有可重构天线的点对点通信系统的时间行为的研究。具体地说，分析了擦除信道上的敏捷无线通信方案；识别了使用可重构天线在吞吐量和平均延迟方面产生显著性能增益的情况。还研究了在接收器处仅有部分状态信息可用的场景，自然地导致了部分可观察的决策过程。
This article considers the performance of wireless communication systems that utilize reconfigurable or pattern-dynamic antennas. The focus is on finite-state channels with memory and performance is assessed in terms of real-time behavior. In a wireless setting, when a slow fading channel enters a deep fade, the corresponding communication system faces the threat of successive decoding failures at the destination. Under such circumstances, rapidly getting out of deep fades becomes a priority. Recent advances in fast reconfigurable antennas provide new means to alter the statistical profile of fading channels and thereby reduce the probability of prolonged fades. Fast reconfigurable antennas are therefore poised to improve overall performance, especially for delay-sensitive traffic in slow-fading environments. This potential for enhanced performance motivates this study of the temporal behavior of point-to-point communication systems with reconfigurable antennas. Specifically, agile wireless communication schemes over erasure channels are analyzed; situations where using reconfigurable antennas yield substantial performance gains in terms of throughput and average delay are identified. Scenarios where only partial state information is available at the receiver are also examined, naturally leading to partially observable decision processes.