| 认知OFDM系统中抗窄带干扰的递推式干扰检测和译码 |
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| 引用本文： | 杨旸,王金龙,丁茜.认知OFDM系统中抗窄带干扰的递推式干扰检测和译码[J].解放军理工大学学报,2008,9(6):646-650. |
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| 作者姓名： | 杨旸 王金龙 丁茜 |
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| 作者单位： | 解放军理工大学通信工程学院,江苏南京210007 |
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| 基金项目： | 国家863计划资助项目
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国家973计划资助项目
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| 摘 要： | 针对授权窄带系统可能对认知OFDM系统造成的窄带干扰,提出了一种抗窄带干扰的递推式干扰检测和译码算法。该算法构造了一种新颖的递推式干扰检测和译码的结构,能够由一个被干扰符号递推出其他被干扰符号,同时对软判决译码所需的干扰功率和噪声功率进行估算。仿真结果表明：该算法无需已知关于干扰和噪声的任何统计信息,就可在很大的干扰功率范围内达到接近最大似然译码的性能。
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| 关 键 词： | 认知无线电 窄带干扰 维特比译码 最大似然译码 |
Recursive interference detection and decoding combat narrow band
interference in OFDM-based cognitive radio |
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| YANG Yang,WANGJin-long and DIN GQiam.Recursive interference detection and decoding combat narrow band
interference in OFDM-based cognitive radio[J].Journal of PLA University of Science and Technology(Natural Science Edition),2008,9(6):646-650. |
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| Authors: | YANG Yang WANGJin-long and DIN GQiam |
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| Institution: | Institute o f Communicatio ns Eng ineering , PLA Univ. of Sci. & T ech. , Nanjing 210007, China;Institute o f Communicatio ns Eng ineering , PLA Univ. of Sci. & T ech. , Nanjing 210007, China;Institute o f Communicatio ns Eng ineering , PLA Univ. of Sci. & T ech. , Nanjing 210007, China |
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| Abstract: | The nar row band interference in cog nit ive OFDM system pro duced by the licensed narrow bandsy
stem w as studied. An alg orithm cal led recursiv e interference detect ion and decoding of the narrow -band
interference w as proposed. The alg orithm conceived a nov el recursive interference detect ion and deco ding
st ructure w hich could deduce o ther jammed symbo ls f rom one symbol, and est imated the pow er of interference
and no ise at the same t ime. T he simulat ion resul ts show that the proposed algorithm can reach the
performance o f the Maximum Likelihoo d decoding in a w ide interference pow er extent w ithout know ing
any stat ist ic knowledge about interference and noise. |
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| Keywords: | OFDM |
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