摘要
频率同步是影响正交频分复用系统性能的一个重要的问题。提出了一种利用重复对称序列构成的训练序列进行正交频分复用系统同步的新方法。通过数据相关运算,结合构造训练序列的特点,得出比较准确的频率偏移值。新方法有精度高和估计范围大的优点,同时在高斯信道、噪声信道和多径信道(Raleigh)下的仿真验证了算法的有效性。
Frequency synchronization is one of the most important issues affecting performance of an orthogonal frequency division multiplexing （OFDM） system. In this paper a new frequency offset estimation method using repeated symmetry sequences is introduced. Base on structure characteristics of the training sequence, a quite accurate frequency offset can be obtained through a data correlation operation. Precise estimation and a large estimation range can be obtained. Simulations in Additive White Gaussion Noise（AWGN） and Raleigh channel show validity of the proposed algorithm.
出处
《声学技术》
CSCD
北大核心
2006年第2期145-149,共5页
Technical Acoustics
关键词
OFDM
频率同步估计
衰落信道
重复对称序列
OFDM
frequency synchronization estimation
fading channel
repeated symmetry sequences
