Noncoherent Multiuser Massive SIMO for Low-Latency Industrial IoT Communications
2019 IEEE International Conference on Industrial Cyber Physical Systems (ICPS)(2019)
摘要
In this paper, we consider a multiuser massive single-input multiple-output (SIMO) enabled Industrial Internet of Things (IIoT) communication system. To reduce the latency and overhead caused by channel estimation, we assume that only the large-scale fading coefficients are available. We employ a noncoherent maximum-likelihood (ML) detector at the receiver side which does not need the instantaneous channel state information (CSI). For such a massive SIMO system, we present a new design framework to assure that each transmitted signal matrix can be uniquely determined in the noise-free case and be reliably estimated in noisy cases. The key idea is to utilize a new concept called the uniquely decomposable constellation group (UDCG) based on the practically used quadrature amplitude modulation (QAM) constellation. To improve the average error performance when the antenna array size is scaled up, we propose a max-min Kullback-Leibler (KL) distance design by carrying out optimization over the transmitted power and the sub-constellation assignment. Finally, simulation results show that the proposed design outperforms significantly the existing max-min Euclidean distance based method in terms of error performance. Moreover, our proposed approach also has a better error performance than the conventional coherent zero-forcing (ZF) receiver with orthogonal training for cell edge users.
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关键词
noncoherent multiuser massive SIMO,industrial IoT communications,channel estimation,large-scale fading coefficients,noncoherent maximum-likelihood detector,instantaneous channel state information,massive SIMO system,design framework,transmitted signal matrix,noise-free case,noisy cases,uniquely decomposable constellation group,average error performance,antenna array size,max-min Kullback-Leibler distance design,transmitted power,sub-constellation assignment,quadrature amplitude modulation constellation,Industrial Internet of Things communication system,multiuser massive single-input multiple-output system,max-min Euclidean distance based method,conventional coherent zero-forcing receiver,orthogonal training,cell edge users
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