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
中图分类号:
周新力, 龚岳洲, 孙小东, 孟庆萍. 一种低复杂度的频偏估计算法[J]. 计算机工程, 2013, 39(3): 128-131,145.
ZHOU Xin-Li, GONG Yue-Zhou, SUN Xiao-Dong, MENG Qiang-Ping. A Low-complexity Frequency Offset Estimation Algorithm[J]. Computer Engineering, 2013, 39(3): 128-131,145.