| 基于时频联合估计的短波OFDM的检测算法 |
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| 引用本文： | 阚春荣,王庭昌.基于时频联合估计的短波OFDM的检测算法[J].电子与信息学报,2005,27(6):857-860. |
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| 作者姓名： | 阚春荣 王庭昌 |
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| 作者单位： | 解放军理工大学通信工程学院,南京,210007;总参第63研究所,南京,210007 |
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| 摘 要： | 针对短波信道的特点,该文提出了一种OFDM同步检测方案。方案采用m序列调制导频符号,利用时频偏移联合估计得到m序列的相关峰来实现同步检测。该文理论分析了方案中判决门限区间的选取。蒙特卡罗仿真表明,该方案在低信噪比(-10dB)下性能良好,有可靠的同步概率和小的虚警概率。
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| 关 键 词： | 正交频分复用（OFDM） 检测 低信噪比 伪随机噪声（PN）序列 |
| 文章编号： | 1009-5896(2005)06-0857-04 |
| 收稿时间： | 2003-12-29 |
| 修稿时间： | 2003年12月29 |
A Detection Algrithm Based on Joint Time and Frequency Offset Estimation for OFDM in HF Communications |
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| KAN Chun-rong,WANG Ting-chang.A Detection Algrithm Based on Joint Time and Frequency Offset Estimation for OFDM in HF Communications[J].Journal of Electronics & Information Technology,2005,27(6):857-860. |
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| Authors: | KAN Chun-rong WANG Ting-chang |
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| Affiliation: | Institute of Communication Engineering PLA UST, Nanjing 210007, China;The 63rd Research Institute, PLA General Staff Headquarters, Nanjing 210007 China |
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| Abstract: | Against the character of HF channels, this paper presents an OFDM synchronization detection scheme, which uses m sequence to modulate the pilot symbols. Based on joint time and frequency-offset estimation, synchronization detection can be implemented using the correlation peak of the m sequence in low SNR. Theoretical analysis shows the right selection of range for decision threshold. Monte Carlo simulation results show the scheme has good performance with a reliable detection probability and a low false alarm probability under low SNR( - 10dB). |
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| Keywords: | Orthogonal Frequency Division Multiplex(OFDM) Detection Low SNR Pseudo Noise(PN) sequence |
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