摘要
根据IEEE802.11a的数据分组结构,利用短训练序列时域响应的特点,对接收到的短训练序列进行窗口平移相关,由相关峰确定符号定时,并利用短训练序列进行粗频偏估计。仿真结果表明,该算法能有效地克服噪声及频偏的影响,定时准确,较好地消除了频偏。与其它文献提出的算法相比,具有定时准确、计算量小、频偏估计范围大的特点。
According to the packet structure of IEEE Standard 802.11a and the characters of short training symbols, shifting windows of received short training symbols are correlated. Mathematical methods for OFDM symbol timing can be confirmed from the correlating peak, and coarse carrier frequency offset estimating can be done using short training symbols. The result of emluator shows that this algorithm can overcome the influence of noise and carrier frequency offset, get an exact symbol timing, and eliminate the carrier frequency offset. Comparing with the algorithm in other papers, this algorithm has characters of exact symbol timing, a fell of calculating and a wide range of carrier frequency offse estimation.
出处
《电讯技术》
北大核心
2004年第4期24-28,共5页
Telecommunication Engineering
基金
广东省火炬计划项目资助(2002C1010106)
