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基于循环平稳特性的OFDM盲信道估计算法 被引量：3

Cyclostationarity-based Blind Channel Estimation Algorithm for OFDM System
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摘要 准确的信道估计是无线通信可靠传输的关键技术之一,因此提出一种基于OFDM信号循环平稳特性的单k盲信道估计算法.该类算法无须改变循环频率,而是利用延迟变量的z变换中2个相关值来估计信道,并采用部分频谱信息提出的简化算法可进一步减小运算量.计算机仿真结果验证:单k盲信道估计算法性能明显优于双k算法,而简化的单k算法虽然在高信噪比时性能有所下降,但算法复杂度却大大降低了. Accurate channel estimation is one of the key factors for wireless communication transmission.A novel one-cycle blind channel estimation algorithm is proposed based on cyclostationarity properties of OFDM signal.Without changing cycle frequency,the new algorithm is formed using the two related z-transform values of delay parameter,and a simplified algorithm based on partial spectrum information can further reduce computational complexity.Computer simulation results indicate that the performance of the proposed one-cycle algorithm is superior to that of the two-cycle algorithm.Although the performance optimality is compromised in the simplified one-cycle algorithm in high SNR region,its computational complexity is significantly reduced.
作者 朱文升 李有明 俞建定 陈征
机构地区 宁波大学通信技术研究所
出处 《宁波大学学报（理工版）》 CAS 2010年第4期62-66,共5页 Journal of Ningbo University：Natural Science and Engineering Edition
基金 国家自然科学基金(60772126 60672070) 浙江省自然科学基金(Y1091155) 国际合作项目(2009DFA12120)
关键词 OFDM 循环平稳特性 循环频率 盲信道估计 OFDM cyclostationarity cycle frequency blind channel estimation
分类号 TN92 [电子电信—通信与信息系统]
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参考文献13

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二级参考文献7

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同被引文献25

  • 1党小川,吴佑寿,符剑.数字并行接收机的反馈频域均衡方法[J].清华大学学报（自然科学版）,2006,46(1):63-66. 被引量：1
  • 2卢照敢,张太镒,刘海员,周亚同.正交频分复用系统的非对称调制星座频域信道盲估计方法[J].西安交通大学学报,2006,40(8):940-944. 被引量：1
  • 3张胜利,朱近康,张力力.OFDM系统中一种新的信道估计方法[J].电子与信息学报,2007,29(1):157-160. 被引量：1
  • 4SEO B,CHUNG H K.Improved Blind Channel Estimation for OFDM Systems[J].Digest of Technical Papers.International Conference on Consumer Electronics,2008,57(1):1-5.
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  • 8KOIKE A T,MOLISCH A F, DU AN C J, et al. Capaci-ty, MSE and Secrecy Analysis of Linear Block Precodingfor Distributed Antenna Systems in Multi-user FrequencySelective Fading Channels [ J 3. IEEE Transsactions onCommunications? 2011, 59(3):888-900.
  • 9SU B. Blind Channel Estimation Using Redundant Precod-ing: New Algorithmst Analysis and Theory[D]. Califor-nia; Institute of Technology Pasadena,2008.
  • 10ZHAO W X, FANG F. A Diverse Proof of OFDM Chan-nel Estimation Comparing CP-sequences and Training-se-quences Methods Under LS Frame [C]//Proceedings ofIEEE International Conference on Information Theory andArtificial Intelligence Computing. New York:IEEE, 2011.

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宁波大学学报（理工版）
2010年 第4期

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