摘要
提出了一种新的时频同步方案.该方案基于一种新的训练符号,首先利用该训练符号在时域的共轭对称性完成定时同步,然后利用其频域良好的自相关性完成频率同步.仿真结果表明,与已有方案相比,新方案不仅具有更好的定时和频率偏移估计性能,而且频偏估计范围较大.
A new training symbol was designed and a novel time and frequency synchronization scheme for orthogonal frequency division multiplexing systems was proposed. The time synchronization was accomplished by using the symmetric conjugate of the training symbol in time domain and the frequency synchronization was finished by utilizing the good autocorrelation of the training symbol in frequency domain. The simulation results show that the scheme gives very accurate estimates of symbol timing and carrier frequency offset and provides a very wide acquisition range for the carrier frequency offset.
出处
《上海交通大学学报》
EI
CAS
CSCD
北大核心
2008年第10期1754-1757,共4页
Journal of Shanghai Jiaotong University
基金
国家高技术研究发展计划(863)资助项目(2006AA01Z70)
国家自然科学基金资助项目(60104010107)
高等学校学科创新引智计划资助项目(B08038)
关键词
正交频分复用
训练符号
定时同步
频率同步
orthogonal frequency division multiplexing （OFDM）
training symbol
time synchronization
frequency synchronization
