A novel random access scheme for M2M communication in crowded asynchronous massive MIMO systems
A novel random access scheme for M2M communication in crowded asynchronous massive MIMO systems
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DOI：
10.1049/cmu2.12172
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发表时间：
2020-07
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影响因子：
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通讯作者：
Huimei Han;Wenchao Zhai;Zheng Wu;Ying Li;Jun Zhao;Mingda Chen
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作者：
Huimei Han;Wenchao Zhai;Zheng Wu;Ying Li;Jun Zhao;Mingda Chen
提出了一种新的随机接入方案来解决拥挤异步大规模多输入多输出（MIMO）系统中M2M通信的小区内导频冲突问题。所提出的方案利用所提出的通过旋转不变技术增强（ESPRIT-E）方法来估计信号参数来估计有效定时偏移，然后活动UE从上行链路消息传输的有效定时偏移中获得其定时误差。我们分析了估计的 UE 有效定时偏移的均方误差以及上行链路吞吐量。仿真结果表明，与现有的拥挤异步大规模MIMO系统随机接入方案相比，该方案能够提高上行吞吐量，同时准确估计有效定时偏移。
A new random access scheme is proposed to solve the intra-cell pilot collision for M2M communication in crowded asynchronous massive multiple-input multiple-output (MIMO) systems. The proposed scheme utilizes the proposed estimation of signal parameters via rotational invariance technique enhanced (ESPRIT-E) method to estimate the effective timing offsets, and then active UEs obtain their timing errors from the effective timing offsets for uplink message transmission. We analyze the mean squared error of the estimated effective timing offsets of UEs, and the uplink throughput. Simulation results show that, compared to the exiting random access scheme for the crowded asynchronous massive MIMO systems, the proposed scheme can improve the uplink throughput and estimate the effective timing offsets accurately at the same time.