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首页> 外文期刊>IEEE systems journal >MIMO-OFDM NB-PLC Designs in Underground Medium-Voltage Networks
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MIMO-OFDM NB-PLC Designs in Underground Medium-Voltage Networks

机译：地下中压网络中的MIMO-OFDM NB-PLC设计

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摘要

In this paper, we investigate the application of multi-input multi-output (MIMO) orthogonal frequency-division multiplexing (OFDM) to narrowband powerline communications (NB-PLC) over medium-voltage (MV) underground (UG) networks. We study different MIMO transmission scenarios with different injection configurations utilizing both the cable conductor and sheath phases. Multiconductor transmission line theory is used to accurately characterize the UG MV NB-PLC channel transfer function and evaluate the spatial correlation between the different conductor phases. The achievable data rates are evaluated for all configurations at different line lengths after optimizing the transmit energy allocation across the different spatial information streams subject to a transmit power spectral density constraint. The achievable data rates for MIMO configurations are shown to be significantly higher (by up to three times higher) compared to single-input single-output OFDM transmission. Moreover, we investigate the effects of practical design constraints, such as cyclic prefix length and bit caps, on the achievable data rates. Finally, we show how to reduce the complexity of both the transmitter and receiver implementations while minimizing the data rate loss.
机译：在本文中，我们研究了多输入多输出（MIMO）正交频分复用（OFDM）在中压（MV）地下（UG）网络上的窄带电力线通信（NB-PLC）中的应用。我们研究利用电缆导体和护套相位的，具有不同注入配置的不同MIMO传输方案。多导体传输线理论用于准确表征UG MV NB-PLC通道传递函数，并评估不同导体相之间的空间相关性。在优化了受发射功率谱密度约束的不同空间信息流之间的发射能量分配之后，针对不同线路长度的所有配置评估了可达到的数据速率。与单输入单输出OFDM传输相比，MIMO配置可实现的数据速率显着提高（最高三倍）。此外，我们研究了实际设计约束条件（例如循环前缀长度和位上限）对可达到的数据速率的影响。最后，我们展示了如何在降低数据速率损失的同时降低发送器和接收器实现的复杂性。

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