| 宽带OFDM的窄带干扰消除器 |
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| 引用本文： | 阚春荣,孙文桥.宽带OFDM的窄带干扰消除器[J].解放军理工大学学报,2006,7(1):11-15. |
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| 作者姓名： | 阚春荣 孙文桥 |
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| 作者单位： | [1]解放军理工大学通信工程学院,江苏南京210007 [2]解放军第210医院,辽宁大连116021 |
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| 摘 要： | 短波宽带OFDM系统极易受到拥挤频段上的窄带干扰。基于Nillsson的宽带OFDM系统，设计了衰落信道低信噪比条件下的窄带干扰消除器。分析了低信噪比时门限的选取和噪声功率的估计问题，提出了自适应门限干扰消除器和部分子带消除器。仿真表明，多径低信噪比条件下，提出的自适应门限干扰消除器能有效抑制窄带干扰，部分子带消除器对窄带干扰消除性能更好。
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| 关 键 词： | 正交频分复用 窄带干扰消除器 m序列 低信噪比 |
| 文章编号： | 1009-3443（2006）01-0011-05 |
| 收稿时间： | 2005-01-06 |
| 修稿时间： | 2005年1月6日 |
Narrowband interference excisers for wideband OFDM |
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| KAN Chun-rong and SUN Wen-qiao.Narrowband interference excisers for wideband OFDM[J].Journal of PLA University of Science and Technology(Natural Science Edition),2006,7(1):11-15. |
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| Authors: | KAN Chun-rong and SUN Wen-qiao |
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| Affiliation: | Institute of Communications Engineering, PLA Univ. of Sci. & Tech., Nanjing 210007, China; No. 210 Hospital of PLA, Dalian 116021, China;Institute of Communications Engineering, PLA Univ. of Sci. & Tech., Nanjing 210007, China; No. 210 Hospital of PLA, Dalian 116021, China |
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| Abstract: | Wideband OFDM communications were easily interfered by narrowband signals. Based on Nilsson's wideband OFDM system, narrowband interference excisers were designed here. The choice of threshold and the power estimation of noise were investigated under low SNR. Then, adaptive threshold interference excisers and segment sub-carrier excisers were proposed. Simulations show that in fading HF channels the performance of the system with adaptive threshold interference exciser can efficiently reduce the attenuation caused by narrow-band interference. The segment sub-carrier excisers have lower BER than others. |
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| Keywords: | OFDM (orthogonal frequency division multiplexing) narrowband interference exciser m sequence low signal noise ratio |
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