计算机工程 ›› 2013, Vol. 39 ›› Issue (3): 128-131,145.doi: 10.3969/j.issn.1000-3428.2013.03.025

• 网络与通信 • 上一篇    下一篇

一种低复杂度的频偏估计算法

周新力,龚岳洲,孙小东,孟庆萍   

  1. (海军航空工程学院电子信息工程系,山东 烟台 264001)
  • 收稿日期:2012-04-20 出版日期:2013-03-15 发布日期:2013-03-13
  • 作者简介:周新力(1964-),男,教授、博士,主研方向:无线通信;龚岳洲,工程师、硕士;孙小东,副教授、博士; 孟庆萍,工程师、博士

A Low-complexity Frequency Offset Estimation Algorithm

ZHOU Xin-li, GONG Yue-zhou, SUN Xiao-dong, MENG Qing-ping   

  1. (Department of Electronic and Information Engineering, Naval Aeronautical and Astronautical University, Yantai 264001, China)
  • Received:2012-04-20 Online:2013-03-15 Published:2013-03-13

摘要: 为解决短波突发通信中的载波同步问题,提出一种低复杂度的频偏估计算法。通过相位折叠使接收信号的频偏具有周期性规律,以避免自相关计算和离散傅里叶变换,从而降低算法复杂度,实现快速载波同步。Matlab仿真结果表明,该算法具有估计精度高、捕获范围广和计算复杂度低的特性,适用于突发通信的频偏估计。

关键词: 突发通信, 载波同步, 频偏估计, 快速同步, 低复杂度, 相位折叠

Abstract: In order to solve the short-wave burst communications carrier synchronization, this paper proposes a low-complexity frequency offset estimation algorithm. It makes the frequency offset of received signal with cycle of law through phase folding phenomenon. In order to reduce algorithm complexity and realize fast synchronization, it can avoid the traditional autocorrelation calculation and discrete Fourier transform by estimating deviation with periodic law. Matlab simulation result shows that this algorithm has the characteristics of high estimation precision, wide capture range and low computational complexity. It is suitable for emergency communication frequency offset estimation.

Key words: burst communication, carrier synchronization, frequency offset estimation, fast synchronization, low-complexity, phase folding

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