一种低复杂度电力线通信系统的同步方法及改进

Torsten Reissland, Matthias Kuba, J. Robert, A. Koelpin, R. Weigel, F. Lurz
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引用次数: 2

摘要

本文对基于fsk的单相电力线通信(PLC)系统中基于能量模式的序列检测(EPSD)算法在复杂度、可靠性和同步性方面进行了改进。提出了一种时间同步方法,它既完成了众所周知的同步发射机和接收机的任务,又有助于避免在粗糙噪声条件下的传输。同步方法基于最大似然方法,该方法利用市电电压的相位。进一步的改进涉及用于传输序列的代码以及在两个FSK载波频率内以等增益和最大比率组合的方式组合信息。此外,还提出了一种低复杂度的帧同步方法。
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Synchronization Approaches and Improvements for a Low-Complexity Power Line Communication System
This paper presents several improvements of the energy-pattern based sequence detection (EPSD) algorithm for FSK-based single-phase power line communication (PLC) systems, in terms of complexity, reliability and synchronization. A time synchronization is presented which fulfills the well known task of synchronizing transmitter and receiver, but also helps to avoid transmissions in periods of rough noise conditions. The synchronization method is based on a maximum-likelihood approach that makes use of the phase of the mains voltage. Further improvements concern the codes used for the trans-mitted sequences as well as the combination of the information within both FSK carrier-frequencies in terms of equal gain and maximum ratio combining. Additionally an approach for a low-complexity frame synchronization is presented.
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