| 频率选择性衰落信道下OFDM子载波数盲估计 |
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| 引用本文： | 曹鹏,彭华,张金成.频率选择性衰落信道下OFDM子载波数盲估计[J].电视技术,2011,35(3):67-70. |
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| 作者姓名： | 曹鹏 彭华 张金成 |
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| 作者单位： | 信息工程大学信息工程学院,河南,郑州,450002 |
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| 基金项目： | 军队重点资助项目，河南基础与前沿项目 |
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| 摘 要： | 提出了一种在频率选择性衰落信道下的基于高阶循环累积量的OFDM信号子载波数盲估计方法,扩展了该方法的适用范围,并进行了理论推导和试验仿真。结果表明OFDM信号的特定高阶循环累积量仅在子载波位置存在,通过检测循环频率的个数可以估计出子载波数。高阶累积量具有良好的抗噪性能,在低信噪比下具有良好的估计性能。
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| 关 键 词： | OFDM 子载波数估计 高阶循环累积量 |
Blind Estimation of OFDM Sub-carrier Frequencies over Frequency-selective Fading Channel |
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| CAO Peng,PENG Hua,ZHANG Jincheng.Blind Estimation of OFDM Sub-carrier Frequencies over Frequency-selective Fading Channel[J].Tv Engineering,2011,35(3):67-70. |
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| Authors: | CAO Peng PENG Hua ZHANG Jincheng |
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| Institution: | CAO Peng,PENG Hua,ZHANG Jincheng(Institute of Information Engineering,Information Engineering University,Zhengzhou 450002,China) |
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| Abstract: | In this paper,the high-order cyclic cumulants to estimate the sub-carriers of OFDM signals in frequency-selective fading channel is exploited,and it is proved by theoretical analysis.Simulation results show that the specific four-order cyclic cumulants of the OFDM signal exit only at the location of its sub-carriers.So the sub-carriers estimation can be implemented by detecting the cyclo-frequenciers.Due to the fact that the high-order cyclic cumulants can suppress the Gaussian noise,the proposed estimator ... |
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| Keywords: | OFDM |
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