| OFDM信号的盲侦察技术分析 |
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| 引用本文： | 李海清,解静.OFDM信号的盲侦察技术分析[J].无线电工程,2010,40(8):26-28,38. |
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| 作者姓名： | 李海清 解静 |
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| 作者单位： | 中国电子科技集团公司第五十四研究所,河北,石家庄,050081 |
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| 摘 要： | 正交频分复用传输系统,以其可对抗频率选择性衰落,高频谱利用率等优点,得到了广泛的应用。论述了正交频分复用(OFDM)信号非协作接收中的某些关键算法,研究了基于循环前缀的符号同步算法及最大联合似然估计(ML)算法、基于高阶累量的OFDM信号调制样式识别算法,解决了OFDM信号和常规通信信号之间的类间信号识别问题。仿真结果进一步说明了该方法的有效性。
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| 关 键 词： | 正交频分复用 正交幅度调制 盲检测 盲调制方式识别 |
Analysis on Blind Reconnaissance Technology for OFDM |
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| LI Hai-qing,XIE Jing.Analysis on Blind Reconnaissance Technology for OFDM[J].Radio Engineering of China,2010,40(8):26-28,38. |
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| Authors: | LI Hai-qing XIE Jing |
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| Affiliation: | ( The 54th Research Institute of CETC,Shijiazhuang Hebei 050081,China) |
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| Abstract: | Orthogonal Frequency Division Multiplexing （OFDM） is widely used,due to its advantage of high data rates in multipath fading environments.Key algorithms in OFDM non-cooperative reception are studied,such as symbol synchronization based on cyclic prefix,ML algorithm,and blind modulation classification algorithm for OFDM signal based on high-order cumulants.The problem of signal recognition between OFDM signal and general communication signals is solved successfully.Simulations further demonstrate the validity of this scheme. |
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| Keywords: | OFDM QAM blind detection blind modulation recognition |
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