| 引用本文: | 刘晓胜,刘佳生,孙贺,刘浩,顾轩溥.用于电力线通信系统的OFDM定时同步算法[J].电力自动化设备,2018,(1): |
| LIU Xiaosheng,LIU Jiasheng,SUN He,LIU Hao,GU Xuanpu.OFDM timing synchronization algorithm for power line communication system[J].Electric Power Automation Equipment,2018,(1): |
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| 摘要: |
| 为了提高电力线通信在恶劣的电力线信道下通信的可靠性，提出了一种新的正交频分复用(OFDM)定时同步算法。该算法在本地相关法的基础上，对Schmidl算法和Park算法的定时函数的计算过程进行改进，实现信号的定时同步。基于MATLAB软件的仿真结果表明，与Park算法相比，所提算法在低信噪比的加性高斯白噪声信道和电力线信道下，都能获得更加精确的定时同步结果，并且所提算法的计算量更小。并在实验室220 V交流电力线的环境下，验证了所提算法的可行性。 |
| 关键词: OFDM 电力线通信 定时同步 本地相关法 计算量 |
| DOI：10.16081/j.issn.1006-6047.2018.01.027 |
| 分类号:TM73 |
| 基金项目:国家自然科学基金资助项目(51677034) |
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| OFDM timing synchronization algorithm for power line communication system |
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LIU Xiaosheng, LIU Jiasheng, SUN He, LIU Hao, GU Xuanpu
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School of Electrical Engineering and Automation, Harbin Institute of Technology, Harbin 150001, China
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| Abstract: |
| In order to improve the reliability of PLC(Power Line Communication) in harsh environment, a new OFDM(Orthogonal Frequency Division Multiplexing) timing synchronization algorithm is proposed. The proposed algorithm realizes the timing synchronization by improving the calculation process of the timing function in Schmidl and Park algorithms on the basis of the local and correlation method. Simulative results of MATLAB demonstrate that the proposed algorithm achieves higher accuracy of timing synchronization in both AWGN(Additive White Gaussian Noise) channel and PLC channel compared with Park algorithm, and the computational burden of the proposed algorithm is lower. The feasibility of the proposed algorithm is verified by experiments conducted in 220 V AC PLC environment. |
| Key words: OFDM power line communication timing synchronization local and correlation method computational burden |
