Robust frequency and timing synchronization for OFDM
Robust frequency and timing synchronization for OFDM
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DOI：
10.1109/26.650240
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发表时间：
1997-12-01
影响因子：
8.3
通讯作者：
Cox, DC
中科院分区：
文献类型：
--
作者：
Schmidl, TM;Cox, DC
提出了一种用于正交频分复用（OFDM）系统的快速同步方法，该方法使用频率选择信道上的连续传输或突发操作，仅在接收两个符号的一个训练序列时即可检测到信号的存在，可以找到帧的开始和符号的开始，并且可以纠正许多子信道间隔的载波频率偏移。该算法在频率偏移估计方差的Cramer-Rao下界附近运行，并且在许多子载波上的固有平均允许在非常低的信噪比（SNR）下进行采集。
A rapid synchronization method is presented for an orthogonal frequency-division multiplexing (OFDM) system using either a continuous transmission or a burst operation over a frequency-selective channel, The presence of a signal can be detected upon the receipt of just one training sequence of two symbols, The start of the frame and the beginning of the symbol can be found, and carrier frequency offsets of many subchannels spacings can be corrected, The algorithms operate near the Cramer-Rao lower bound for the variance of the frequency offset estimate, and the inherent averaging over many subcarriers allows acquisition at very low signal-to-noise ratios (SNR's).