| OFDM系统基本原理及仿真建模分析 |
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| 引用本文： | 王志杨. OFDM系统基本原理及仿真建模分析[J]. 淮南工业学院学报, 2011, 0(1): 51-55 |
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| 作者姓名： | 王志杨 |
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| 作者单位： | 安徽电子信息职业技术学院信息工程系,安徽蚌埠233030 |
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| 基金项目： | 安徽电子信息职业技术学院院级资助项目 |
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| 摘 要： | OFDM技术采用正交载波使频谱发生重叠,可以提高频谱利用率,是众多B3G技术的基础。在介绍了OFDM的基本原理之后,给出了两种系统仿真时的模型。模型一在DFT后只传输信号实部,并在接收端以发端采样速率2倍采样来恢复信号;模型二在IFFT后,信号实部和虚部均传输,并且接收端以发端同样采样速率来恢复信号。第二种模型在运算量和实现复杂度上都较好,应是系统仿真时的首选。
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| 关 键 词： | 正交频分复用 系统仿真 离散傅立叶变换 |
The Fundamental of OFDM System and Its Simulation Modeling |
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| WANG Zhi-yang. The Fundamental of OFDM System and Its Simulation Modeling[J]. Journal of Huainan Institute of Technology(Natural Science), 2011, 0(1): 51-55 |
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| Authors: | WANG Zhi-yang |
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| Affiliation: | WANG Zhi-yang(Department of Information Engineering,Anhui Vocational College of Electronics and Information Technology,Bengbu Anhui 233030,China) |
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| Abstract: | OFDM belongs to multiple-carrier technology.It improves spectral efficiency by using orthogonal carriers to gain overlapped spectrum.It is the basic technology of B3G.The fundamental of OFDM system was briefly introduced,then two system simulation models were given.Model 1 only transfers the real part of the signal after DFT,also it recovers the data by using double sampling frequency of the transmitter.Model 2 transfers both the real and imaginary parts of the signal after IFFT,also it recovers the data by using the same sampling frequency of the transmitter.Model 2 is better in terms of operation quantity and implementation complexity,so it is preferred in system simulation. |
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| Keywords: | OFDM system simulation DFT |
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