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arXiv 1901.08404eess.SP
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基于HS-OFDM的电力线时域反射测量技术的特点与局限性

HS-OFDM-based Time-Domain Reflectometry for Power Line Sensing: Characteristics and Limitations

Lucas Giroto de Oliveira, Mateus de L. Filomeno, Moisés V. Ribeiro

摘要:

本研究探讨了基于厄米对称正交频分复用(HS-OFDM)的时域反射计(TDR)系统在电力线传感中的关键特性和局限性。在这个意义上说,一个系统模型与电力线调制解调器注入信号和捕获提高反射感测配电网络的概述。接下来,详细描述了脉冲压缩和信道估计反射图处理方法,并讨论了系统参数化和多址接入方案对基于HS-OFDM的TDR系统性能的影响。最后,数值结果包括脉冲压缩和信道估计,系统限制的基础上考虑典型的欧洲地下低电压和美国架空中压(MV)的情况下,窄带(NB)电力线通信(PLC)的监管约束参数化之间的比较,并比较多址接入技术在巴西MV架空的情况下,支持进行讨论。基于所得结果,表明信道估计在计算复杂度和旁瓣水平方面优于脉冲压缩。此外,它示出的NB-PLC频率范围提供公平的范围分辨率和最大的明确的范围值。最后,可以看出,频分多址接入多址接入方案的使用在连接到配电网的不同电力线调制解调器(PLM)之间呈现不同的信号与干扰加噪声比(SINR)性能,而时分多址接入和码-分多址接入方案在PLM之间产生公平的SINR性能,代价是由于时间复用和扩展而随着时间获得较少的反射图过程,分别。

英文摘要:

This study discusses key characteristics and limitations of time-domain reflectometry (TDR) systems based on the Hermitian symmetric orthogonal frequency-division multiplexing (HS-OFDM) scheme for power line sensing. In this sense, a system model with a power line modem injecting signals and capturing raising reflections for sensing a power distribution network is outlined. Next, pulse compression and channel estimation reflectogram processing approaches are carefully described and the effects of system parametrization and multiple access schemes on the HS-OFDM-based TDR system performance are addressed. Finally, numerical results covering a comparison between pulse compression and channel estimation, system limitations based on parametrization considering typical European underground low-voltage and US overhead medium-voltage (MV) scenarios and narrowband (NB) power line communication (PLC) regulatory constraints, and comparison among multiple access techniques in a Brazilian MV overhead scenario are presented for supporting the carried out discussion. Based on the attained results, it is shown that channel estimation outperforms the pulse compression in terms of computational complexity and sidelobe level. Also, it is shown that the NB-PLC frequency range provides fair range resolution and maximum unambiguous range values. Finally, it is seen that the use of the frequency-division multiple access multiple access schemes presents different signal-to-interference-plus-noise ratio (SINR) performance among different power line modems (PLMs) connected to a power distribution grid, while the use of time-division multiple access and code-division multiple access schemes results in fair SINR performance among the PLMs at the cost of obtaining less reflectograms over time due to time multiplexing and spreading processes, respectively.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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