| OFDM信号循环谱结构分析 |
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| 引用本文： | 黄奇珊, 彭启琮, 路友荣, 韩猛. OFDM信号循环谱结构分析[J]. 电子与信息学报, 2008, 30(1): 134-138. doi: 10.3724/SP.J.1146.2006.00721 |
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| 作者姓名： | 黄奇珊 彭启琮 路友荣 韩猛 |
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| 作者单位： | 电子科技大学通信与信息工程学院,成都,610054;西南电子电信技术研究所,成都,610041;电子科技大学通信与信息工程学院,成都,610054;西南电子电信技术研究所,成都,610041 |
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| 摘 要： | 利用数字调制信号的循环平稳特性可以完成许多盲信号处理任务，但前提是必须清楚信号的循环谱结构。该文把数字调制信号建模成线性周期时变变换，结合非周期的齐次马尔可夫链模型，推导和计算OFDM信号的循环谱公式，并通过计算机仿真给出了双频面上的OFDM循环谱幅度，结果与理论分析相吻合。
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| 关 键 词： | 循环谱 盲信号处理 正交频分复用 |
| 文章编号： | 1009-5896（2008）01-0134-05 |
| 收稿时间： | 2006-05-29 |
| 修稿时间： | 2006-11-06 |
Cyclic Spectrum Analysis of OFDM Signals |
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| Huang Qi-shan, Peng Qi-cong, Lu You-rong, Han Meng. Cyclic Spectrum Analysis of OFDM Signals[J]. Journal of Electronics & Information Technology, 2008, 30(1): 134-138. doi: 10.3724/SP.J.1146.2006.00721 |
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| Authors: | Huang Qi-shan Peng Qi-cong Lu You-rong Han Meng |
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| Affiliation: | School of Communication and Technology Engineering, UESTC, Chengdu 610054, China; Southwest Electronics and Telecomminication Technology Research Institute, Chengdu 610041, China |
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| Abstract: | Based on cyclostationarity of digital modulated signals, many blind signal processing applications can be completed. But the cyclic spectrum structure of signals must be known in premise. Based on Linear Periodically Time-Variant transformation (LPTV) model and aperiodic homogeneous Markov chain model, the Spectral Correlation Density (SCD) expression of OFDM signals is derived. The magnitudes of cyclic spectrum are graphed as the heights of surfaces above a bifrequency plane. Computer simulation results confirm theoretical analysis. |
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| Keywords: | Cyclic spectrum Blind signal processing OFDM |
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