摘要
该文提出了一种利用重复序列构成的训练序列进行OFDM频率同步的新方法。它通过作两次频率同步, 先是相隔较近的数据作相关,得出频率偏移值,纠正此频率偏移后,再间隔较远的数据作相关,得出较精确的频率偏移值。新方法有估计范围大和精度高的双重优点。AWGN和Rayleigh信道下的仿真验证了算法的有效性。
In this paper a new frequency offset estimation method using repeated sequences is introduced where two steps are involved. In the first step the span of the correlation data is small and a larger estimation range can be achieved. After the frequency offset is compensated, a larger correlation data span is chosen and a precise estimation can be got. Large estimation range and precise estimation can be acquired in the new method. Simulations in AWGN channel and Rayleigh channel verify the validity of the new algorithm.
出处
《电子与信息学报》
EI
CSCD
北大核心
2005年第10期1647-1650,共4页
Journal of Electronics & Information Technology
基金
国家自然科学基金重大项目(60390540-3)国家自然科学基金(60272009)国家863计划(2001AA1230131)教育部博士点基金(20020614001)资助课题
关键词
OFDM
频率同步
重复序列
Orthogonai Frequency Division Multiplexing （OFDM）, Frequency synchronization, Repeated sequence
