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首页> 外文会议>Information Sciences and Systems, 2009. CISS 2009 >Mode selection between antenna grouping and beamforming for MIMO communication systems
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Mode selection between antenna grouping and beamforming for MIMO communication systems

机译：MIMO通信系统中天线分组和波束成形之间的模式选择

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摘要

Antenna grouping algorithms are hybrids of beamforming and spatial multiplexing. With antenna grouping, we can achieve diversity gain through beamforming, and high spectral efficiency through spatial multiplexing simultaneously. In an IID channel, at a fixed transmission rate, we can get better BER performance by antenna grouping compared with beamforming. But if the channel is ill-conditioned or there is some correlation between transmit or receive antennas, the BER performance of antenna grouping is significantly degraded. In that case, beamforming is better than antenna grouping algorithm. We introduced existing antenna grouping algorithms and proposed our new simple antenna grouping algorithms in our previous paper. In this paper, we investigate mode selection algorithms which select antenna grouping or beamforming mode. By selecting a suitable mode for instantaneous channel, we can prevent fluctuation of BER performance caused by channel variation and antenna correlation. We introduce some existing mode selection criteria and also propose a new criterion which is derived from the simple antenna grouping algorithm in the previous paper. This proposed mode selection criterion requires little additional calculations. By comparing with existing mode selection criteria, we verify the performance of our criterion.
机译：天线分组算法是波束成形和空间复用的混合体。通过天线分组，我们可以通过波束成形实现分集增益，并通过空间复用同时实现高频谱效率。在IID信道中，以固定的传输速率，与波束赋形相比，通过天线分组可以获得更好的BER性能。但是，如果信道状况不佳，或者发射或接收天线之间存在某些相关性，则天线分组的BER性能将大大降低。在这种情况下，波束成形优于天线分组算法。我们介绍了现有的天线分组算法，并在之前的论文中提出了新的简单天线分组算法。在本文中，我们研究了选择天线分组或波束成形模式的模式选择算法。通过为瞬时信道选择合适的模式，我们可以防止信道变化和天线相关性引起的BER性能波动。我们介绍了一些现有的模式选择标准，并提出了一种基于先前论文中的简单天线分组算法的新标准。提出的模式选择标准几乎不需要其他计算。通过与现有模式选择标准进行比较，我们验证了标准的性能。

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