| 基于循环平稳特性的OFDM盲信道估计算法 |
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| 引用本文： | 朱文升,李有明,俞建定,陈征.基于循环平稳特性的OFDM盲信道估计算法[J].宁波大学学报(理工版),2010,23(4):62-66. |
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| 作者姓名： | 朱文升 李有明 俞建定 陈征 |
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| 作者单位： | 宁波大学通信技术研究所,浙江宁波315211; |
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| 基金项目： | 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） |
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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.
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| 关 键 词： | OFDM 循环平稳特性 循环频率 盲信道估计 |
Cyclostationarity-based Blind Channel Estimation Algorithm for OFDM System |
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| ZHU Wen-sheng,LI You-ming,YU Jian-ding,CHEN Zheng.Cyclostationarity-based Blind Channel Estimation Algorithm for OFDM System[J].Journal of Ningbo University(Natural Science and Engineering Edition),2010,23(4):62-66. |
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| Authors: | ZHU Wen-sheng LI You-ming YU Jian-ding CHEN Zheng |
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| Institution: | (Institute of Communication Technology,Ningbo University,Ningbo 315211,China) |
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| Abstract: | 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. |
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| Keywords: | OFDM |
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