| OFDM信号频谱分析及两种带外辐射抑制技术的性能比较 |
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| 引用本文： | 徐任晖,高蕊,丁磊.OFDM信号频谱分析及两种带外辐射抑制技术的性能比较[J].中国电子科学研究院学报,2007,2(3):306-309. |
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| 作者姓名： | 徐任晖 高蕊 丁磊 |
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| 作者单位： | 解放军理工大学,通信工程学院,南京,210007;东南大学,移动通信国家重点实验室,南京,210096;中国科学院研究生院,北京,100049;总参信息安全设备测评认证中心,北京,100072 |
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| 摘 要： | 加入循环前缀之后的OFDM信号的频谱不再是若干函数叠加的形式,子载波频谱不仅具有虚部,而且子载波间也不再保持正交性.基于这种更准确的OFDM子载波频谱模型,重新衡量两种抑制OFDM信号功率谱带外辐射方案的性能,为认知无线电系统的调制方案设计提供参考.
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| 关 键 词： | 正交频分复用 功率谱 带外辐射 认知无线电 |
| 文章编号： | 1673-5692（2007）03-306-04 |
| 修稿时间： | 2007-03-10 |
Spectrum of OFDM Signal and Performance Analysis of Two Types of out of Band Power Suppression Schemes |
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| XU Ren-hui,GAO Rui,DING Lei.Spectrum of OFDM Signal and Performance Analysis of Two Types of out of Band Power Suppression Schemes[J].Journal of China Academy of Electronics and Information Technology,2007,2(3):306-309. |
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| Authors: | XU Ren-hui GAO Rui DING Lei |
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| Affiliation: | 1. ICE, PLAUST, Nanjing 210007, China; 2. NCRL, Southeast Univ. , Nanjing 210096, China; 3. Graduate School of CAS, Beijing 100049, China; 4. Cypher Testing Evaluation Certification Center, Beijing 100072, China |
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| Abstract: | The spectrum of OFDM signal, added by Cyclic Prefix, is not simply the superposition of functions. Moreover, the spectrum of OFDM subcarrier has imaginary part, and the orthogonality among subcarriers is destructed. Based on this spectrum model, two schemes of suppressing out-of-band radiation are re-evaluated. The performance comparison of suppression is given through simulation. |
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| Keywords: | orthogonal frequency division modulation (OFDM) power spectrum out of band radiation cognitive radio |
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