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一种快变信道下OFDM系统的Kalman信道估计算法 被引量：2

A modified Kalman channel estimation algorithm for OFDM systems in fast time-varying environment
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摘要 针对频率选择性快速时变信道的多径干扰和较大的多普勒频谱扩展,提出了一种改进的Kalman滤波算法,用于正交频分复用(OFDM)系统信道估计.该算法采用复杂度大大降低的低维Kalman滤波来跟踪快速时变信道,迭代联合信道估计与检测算法来获得测量矩阵,并对滤波结果利用一种新的简单的最小均方误差(MMSE)估计器进行优化,有效地降低了传统基于Kalman滤波算法的复杂度.仿真结果表明,该方法能够跟踪信道的快速变化,具有良好的估计性能. A modified Kalman fiheri plexing （OFDM） systems is propo ng channel estimation algorithm for orthogonal frequency division muhised for a frequency-selective fast time-varying channel. The method can track the time-varying channel by using a low-dimensional Kalman filtering estimator which greatly reduces the complexity of a high-dimensional Kalman filter. The measurement matrix was obtained through iteration of joint channel estimation and the detection algorithm. Furthermore, the result was optimized by using a new simplified minimal mean-squared error （MMSE） estimator. Simulation results show that this method can track the time-varying channel and achieve good performance.
作者 任大孟 张曙
机构地区 哈尔滨工程大学信息与通信工程学院
出处 《哈尔滨工程大学学报》 EI CAS CSCD 北大核心 2007年第11期1268-1272,共5页 Journal of Harbin Engineering University
关键词 正交频分复用 信道估计 卡尔曼滤波 最小均方误差 orthogonal frequency division multiplexing channel estimation Kalman filter minimum meansquared error
分类号 TN911.5 [电子电信—通信与信息系统]
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参考文献8

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同被引文献12

  • 1俞春华,刘艳国.信道估计在OFDM系统中的应用[J].通信与广播电视,2008(1):1-5. 被引量：3
  • 2RUSSELL M,STUBER G L. Intercharmel interference analysis of OFDM in a mobile environment[A]. In Proc IEEE95 [ C]. Chicago, USA, 1995.
  • 3ZHAO Y, HAGGMAN S. Intercarrier interference selfcancellation scheme for OFDM mobile oommunication systems [J]. IEEE Trans Commun,2001,49(7):1185- 1191.
  • 4HANKY. Channel estimation for OFDM with fast fading channels by modified Kalrnan filter[J]. IEEE Trans Consurner Electronics, 2004,50 (2) : 443 - 449.
  • 5CHEN W,ZHANG R, Kalman filter channel estimator for OFDM systems in time and frequency ,selective fading environment[A]. In Proc IEEE ICASSP[C]. Montreal, Canada, 2004.
  • 6JAKES W C . Microwave mobile communication [ M]. New York: Wiley, 1974.
  • 7O. Edfors, M. Sandell, J.J. van de Beek, S,K,Wilson, and P. O. Borjesson. OFDM channel estimation by singular value decomposition [J ]. IEEE Trans. Cornmun., 1998,46(7) :931 - 939.
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  • 9王文博;郑侃.宽带无线通信OFDM技术[M]北京:人民邮电出版社,200310-67.
  • 10Sinem Coleri,Mustafa Ergen,Anuj Puri. Channel estimation Techniques based on pilot arrangement in OFDM Systems[J].IEEE Transactions on Broadcasting,2002,(03):223-229.

引证文献2

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哈尔滨工程大学学报
2007年 第11期

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