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短波宽带OFDM的相对门限干扰消除器 被引量：3

A Relative Threshold Exciser of Narrowband Interference for Wideband OFDM in HF Communications
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摘要 短波宽带OFDM系统极容易受到拥挤频段上的窄带干扰,低信噪比工作条件下可能带来性能的急剧恶化。该文在Nilsson的宽带OFDM系统基础上设计了一种适合短波多径信道的相对门限干扰消除器。分析了低信噪比下相对门限的选取和噪声功率的估计问题,并对信道补偿做了改进,以减小噪声干扰。理论分析和仿真表明,低信噪比下,这种门限干扰消除器可以使系统在有干扰的条件下性能接近于理想干扰消除器的性能。 Wideband OFDM communications are easily been interfered by narrowband signal. The attenuation is worse in low SNR. Based on Nilsson＇s wideband OFDM system, a relative threshold exciser for narrowband interference is designed here. The choice of relative threshold and the power estimation of noise are investigated under low SNR. To reduce noise interference, the method of channel compensation is modified for noisy environment. Theoretic analysis and simulations show tbe performance of the system with this relative threshold exciser can keep up with the ideal interference exciser in HF communications under low SNR.
作者 阚春荣 王庭昌
机构地区 解放军理工大学通信工程学院 总参第
出处 《电子与信息学报》 EI CSCD 北大核心 2006年第7期1266-1269,共4页 Journal of Electronics & Information Technology
关键词 正交频分复用(OFDM) 相对门限干扰消除器 窄带干扰 M序列 低信噪比 OFDM, Relative threshold exciser, Narrowband interference, m sequence, Low signal noise ratio
分类号 TN919.3 [电子电信—通信与信息系统]
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参考文献5

  • 1Nilsson J E M, Giles T C. Wideband multi-carrier transmission for military HF communication [C]. Proc. Milcom'97, Monterey,U.S.A., 1997: 1046- 1051.
  • 2Nilsson R, Sjoberg F, LeBlanc J P. A narrow-band interference canceller for OFDM-based systems [C]. EPMCC01, Vienna,Austria, 2001: 1 - 8.
  • 3Hsiao H F, Hsieh M H, Wei C H. Narrow-band rejection in OFDM-CDMA transmission system [C]. ISCAS '98 Monterey,USA 1998:437 - 440.
  • 4Schmidt K U, Ertel J, Benedix M, et al.. Subcarrier exclusion techniques for coded OFDM[C]. 8th International OFDM Workshop 2003, InOWo Germany, 2003:24 - 25.
  • 5Theodore S. Rappaport, Wireless communications principles & practice[M]. Prentice-Hall, Inc. 1996:176- 185.

同被引文献14

  • 1梅雪艳.LDPC码译码失败及抗突发误码研究[J].电讯技术,2007,47(3):79-82. 被引量：3
  • 2NILSSON J E M, GILES T C. Wideband multi-carrier transmission for military HF communication[R]. Sweden: Division of Command and Control Warfare Technology, 1997:11-14.
  • 3GB20600-2006，数字电视地面广播传输系统帧结构、信道编码和调制[S].2006，8．
  • 4Nee R,Prasad R.OFDM for wireless multimedia communications[M].London,Artech House,Inc,2000.
  • 5Yang C Y,Ku M K.LDPC coded OFDM modulation for high spectral efficiency transmission[C].IEEE 4th European Conference,Circuits and Systems for Communications,Bucharest,2008:280-284.
  • 6Gallager R G.Low-density parity-check codes[J].Information Theory,IRE Transactions on,1962,8(1):21-28.
  • 7Mac Kay D J C.Good error-correcting codes based on very sparse matrices[J].Information Theory,IEEE Transactions on,1999,45(2):399-431.
  • 8ETSI TR 102 376,User guidelines for the second generation system for broadcasting,interactive services,new gathering and other broadband satellite applications(DVB-S2)[S].2005.
  • 9Futaki H,Ohtsuki T.Low-density parity-check(LDPC)coded OFDM systems[C].IEEE 54th Vehicular Technology Conference,Atlantic City,2001,1:82-86.
  • 10Lei M,Harada H.Low-density parity-check(LDPC)coded ultra high-data-rate OFDM system in frequency-selective fading[C].IEEE 61st Vehicular Technology Conference,Stockholm,2005,3:1590-1594.

引证文献3

二级引证文献5

电子与信息学报
2006年 第7期

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