| 电力线通信中OFDM同步改进算法研究 |
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| 引用本文： | 罗蕾. 电力线通信中OFDM同步改进算法研究[J]. 电视技术, 2013, 37(15) |
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| 作者姓名： | 罗蕾 |
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| 作者单位： | 华北电力大学电气与电子工程学院,河北保定,071003 |
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| 基金项目： | 国家自然科学基金项目（面上项目，重点项目，重大项目） |
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| 摘 要： | 正交频分复用(Orthogonal Frequency Division Multiplexing,OFDM)是一种能够有效对抗电力线通信中的频率选择性衰落、多径和窄带干扰的技术,而OFDM技术对同步偏差十分敏感,微小的同步偏差也会影响OFDM系统的性能.针对电力线通信中OFDM系统的同步问题,给出一种基于恒包络零自相关(CAZAC)序列的时频同步的方法.MATLAB仿真表明,所提算法在减少运算量的基础上能很好地完成符号同步和频偏同步,明显改善电力线中OFDM的同步性能.
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| 关 键 词： | 正交频分复用 CAZAC序列 符号定时同步 频率同步 电力线通信 |
| 收稿时间： | 2013-03-08 |
| 修稿时间： | 2013-04-07 |
An Improved Synchronization Algorithm for OFDM Based Powerline Communication |
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| luolei. An Improved Synchronization Algorithm for OFDM Based Powerline Communication[J]. Ideo Engineering, 2013, 37(15) |
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| Authors: | luolei |
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| Affiliation: | North China Electric Power University |
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| Abstract: | Orthogonal Frequency Division Multiplexing (OFDM) is a promising technology for combating the frequency selective fading, multipath propagation, and narrowband interference in power line communication. However, OFDM systems are extremely sensitive to synchronization deviation. Slight synchronization deviation can affect the performance of OFDM systems. This paper presents a design and implementation synchronization algorithm based on constant amplitude zero auto-correlation (CAZAC) for power line communication. Matlab simulation prove that, with less computation, the proposed algorithm can complete symbol timing synchronization and frequency offset synchronization well and the performance of OFDM synchronization in power line communication is significantly improved. |
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| Keywords: | Orthogonal Frequency Division Multiplexing CAZAC Timing Synchronization Frequency Synchronization Powerline Communication |
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