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基于分数倍基扩展模型的双选信道估计方法 被引量：2

Doubly Selective Channel Estimation Based on Fractional Basis Expansion Model
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摘要 通过分析复指数基扩展模型(BEM)与多普勒扩展频谱之间的关系,提出一种基于分数倍基扩展模型的双选信道估计方法。当接收机能够获得最大多普勒频率值时(可以通过自身运动速度等计算或者作相应估计),通过相应调整BEM基频率为原来的1/K倍,信道估计的均方误差性能得到明显改善。另外,还提出了重叠利用训练符号的改进算法,研究表明改进算法可以进一步提高信道估计的质量。 By analyzing the relationship between basis expansion model （BEM） and Doppler spectrum, the authors propose a scheme based on fractional BEM for the estimation of doubly selective channel parameters. When the receiver detects the maximum frequency of Doppler-spread, the frequency of BEM is modified by a factor of l/K, and improved mean-square error of channel can be obtained.
作者 刘英男 蒋伟 姚春光 王武军 梁庆林
机构地区 北京大学信息科学与技术学院 国防科技大学电子科学与工程学院
出处 《北京大学学报（自然科学版）》 EI CAS CSCD 北大核心 2008年第1期87-92,共6页 Acta Scientiarum Naturalium Universitatis Pekinensis
基金 国家自然科学基金(60462002) 国防预研基金资助项目
关键词 信道估计 双选信道 基扩展模型 均方误差 channel estimation doubly selective channel basis expansion model （BEM） mean-square error
分类号 TN925 [电子电信—通信与信息系统]
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参考文献8

  • 1Choi Y S, Vohz P J, Cassara F A. On channel estimation and detection for muhicarrier signals in fast and selective Rayleigh fading channels. IEEE Trans Commun, 2001,49: 1375-1387
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同被引文献19

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  • 3COLERI S, ERGEN M, PURI A, et al. Channel estimation techniques based on pilot arrangement in OFDM systems [ J]. IEEE Transactions on Broadcasting, 2002, 48 (3) : 223-229.
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  • 6WANG S, HU J. Blind channel estimation for single-input mul- tiple-output OFDM systems: zero padding based or cyclic prefix based[ J]. Wireless Communications and Mobile Computing, 2013, 13(1) : 204-210.
  • 7ZHOU S, MUQUET B, GIANNAKIS G B. Subspace-based (semi-) blind channel estimation for block precoded space- time OFDM [ J]. IEEE Transactions on Signal Processing, 2002, 50(5) : 1215-1228.
  • 8ZHAO Y, LI X, LI Y, et al. Resource allocation for high- speed railway downlink MIMO-OFDM system using quantum- behaved particle swarm optimization[ C]. Proceedings of IEEE International Conference on Communications, Budapest, Hun- gary: IEEE Press, 2013 : 2343-2347.
  • 9ZHAO Y, LI X, J1 H. Radio admission control scheme for high-speed railway communication with MIMO antennas [ C ]. Proceedings of IEEE International Conference on Communica- tions, Ottawa, Canada: IEEE Press, 2012: 5005-5009.
  • 10TANG Z, CANNIZZARO R C, LEUS G, et al. Pilot-assisted time-varying channel estimation for OFDM systems [ J]. IEEE Transactions on Signal Processing, 2007, 55 (5) : 2226-2238.

引证文献2

北京大学学报（自然科学版）
2008年 第1期

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