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首页> 外文期刊>IEEE Transactions on Communications >Time-Reversal Massive Multipath Effect: A Single-Antenna “Massive MIMO” Solution
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Time-Reversal Massive Multipath Effect: A Single-Antenna “Massive MIMO” Solution

机译：时间逆向大规模多径效应：单天线“大规模MIMO”解决方案

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摘要

The explosion of mobile data traffic calls for new efficient 5G technologies. Massive multiple-input multiple-output (MIMO), which has shown the great potential in improving the achievable rate with a very large number of antennas, has become a popular candidate. However, the requirement of deploying a large number of antennas at the base station may not be feasible in indoor scenarios due to the high implementation complexity. Does there exist a good alternative that can achieve similar system performance to massive MIMO for indoor environment? In this paper, we show that by using time-reversal (TR) signal processing, with a sufficiently large bandwidth, one can harvest the massive multipaths naturally existing in a rich-scattering environment to form a large number of virtual antennas and achieve the desired massive multipath effect with a single antenna. We answer the above question by analyzing the TR massive multipath effect and the achievable rate with some waveforms. We also derive the corresponding asymptotic achievable rate under a massive multipath setting. Experiment results based on real indoor channel measurements show that the massive multipaths can be revealed with a sufficiently large bandwidth in a practical indoor environment. Moreover, based on our experiments with real indoor measurements, the achievable rate of the TR wideband system is evaluated.
机译：移动数据流量的爆炸式增长需要新的高效5G技术。大规模多输入多输出（MIMO）已显示出很大的潜力，可以通过大量天线提高可达到的速率，现已成为一种流行的候选方法。但是，由于实现复杂度高，在室内场景下可能无法在基站部署大量天线。是否存在一个好的替代方案，可以实现与室内环境的大规模MIMO相似的系统性能？在本文中，我们表明，通过使用时间反转（TR）信号处理并具有足够大的带宽，人们可以捕获自然存在于丰富散射环境中的大量多径路径，从而形成大量的虚拟天线并达到预期的效果单个天线即可产生巨大的多径效应。我们通过分析TR大规模多径效应和某些波形可达到的速率来回答上述问题。我们还推导了在大规模多径设置下相应的渐近可实现率。基于实际室内信道测量的实验结果表明，在实际的室内环境中，可以以足够大的带宽显示大量的多路径。此外，根据我们在实际室内测量中的实验，评估了TR宽带系统的可达到速率。

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