基于子带动态划分的电力线OFDM自适应算法研究  

Analysis of adaptive OFDM algorithm based on dynamical sub-bands division for power line carrier censor network

作　　者：刘盈[1,2] 代鹏飞 蔡丽萍[2] 李明维[1] 

机构地区：[1]中国电力科学研究院,北京100192 [2]中国石油大学计算机与通信工程学院,山东东营257061 [3]中国石油西部管道公司,新疆乌鲁木齐830012

出　　处：《计算机工程与设计》2012年第5期1720-1724,共5页Computer Engineering and Design

摘　　要：针对电力线载波通信中信道的强时变问题,提出了一种基于子带动态划分的电力线OFDM自适应调制算法。算法根据信道的变化状态动态的进行子带划分,并在此基础上根据信噪比门限为各子带实时的选择合适的调制方式,从而减少了因信道时变带来的信令消息负荷。仿真实验结果表明,该算法能较有效解决复杂度高、误码率较大等问题,提高了电力线系统的性能。To adapt to the time-variant characteristic of the power line communication（PLC） channel,an adaptive orthogonal frequency division multiplex（OFDM） algorithm based on sub-bands is proposed.The algorithm can divide sub-bands dynamically according to the channel state.It can also choose the appropriate modulation mode for the sub-bands according to the real-time channel state which reduces the transmission of signaling messages.Simulation and experimental results show that this algorithm reduce the complexity,the bit error rate and improve the volume of the system.It can effectively improve the performance of the PLC system.

关 键 词：电力线通信 正交频分复用技术 信道估计 自适应调制 子带 

分 类 号：TN914.1[电子电信—通信与信息系统]