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arXiv 0811.3887cs.ITmath.IT
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现代MIMO系统中的发射分集与空间复用

Transmit Diversity v. Spatial Multiplexing in Modern MIMO Systems

Angel Lozano, Nihar Jindal

摘要:

一个当代的角度之间的权衡发射天线分集和空间复用。有人认为,在大多数现代无线系统的背景下以及对于感兴趣的操作点,利用所有可用空间自由度进行复用的传输技术优于显式牺牲空间复用以实现多样性的技术。因此,在这样的系统的上下文中,在MIMO通信中基本上不需要在发射天线分集和空间复用之间做出决定。然而,要得出这一结论,需要对信道和一些关键系统特性进行充分建模,并采用适当的性能指标;如果做不到这一点,可能会得出截然不同的结论。作为具体示例,使用3GPP长期演进系统设计来说明这种对比。

英文摘要:

A contemporary perspective on the tradeoff between transmit antenna diversity and spatial multiplexing is provided. It is argued that, in the context of most modern wireless systems and for the operating points of interest, transmission techniques that utilize all available spatial degrees of freedom for multiplexing outperform techniques that explicitly sacrifice spatial multiplexing for diversity. In the context of such systems, therefore, there essentially is no decision to be made between transmit antenna diversity and spatial multiplexing in MIMO communication. Reaching this conclusion, however, requires that the channel and some key system features be adequately modeled and that suitable performance metrics be adopted; failure to do so may bring about starkly different conclusions. As a specific example, this contrast is illustrated using the 3GPP Long-Term Evolution system design.

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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