OFDM技术的理论分析与仿真实现  

Theoretical analysis and system simulation of OFDM technique

作　　者：马英红[1] 谢志远[1] 刘爱辉[1] 

机构地区：[1]华北电力大学电子与通信工程学院,河北保定071003

出　　处：《电力系统通信》2005年第9期1-3,9,共4页Telecommunications for Electric Power System

摘　　要：文章对正交频分复用技术(O FDM)包括子载波间隔的选择、调制解调原理进行了理论分析;对O FDM系统的IFFT/FFT实现进行了数学推导,并给出了一种基于IFFT/FFT的O FDM系统仿真方案以及该方案仿真参数的设计方法和步骤,为实际应用中O FDM系统的设计提供了理论依据;给出了该方案的O FDM系统仿真结果,验证了O FDM信号的白噪声特性和O FDM通信系统较强的抗频率选择性衰落特性。In this paper orthogonal frequency division multiplexing technique （OFDM） is theoretically analyzed, including the choice of subcarrier interval and modulate-demodulate principle, the analysis is helpful to understand OFDM entirely, it is mathematically actualized to use IFFT/FFT in OFDM system, then the OFDM system simulation scheme based on IFFT/FFT and the approach of the design parameters are proposed, which offer theoretical foundation for the design of practical OFDM system. Finally the simulating result is presented, which validates white noise characteristic of the OFDM signal and the characteristic of anti-attenuation of frequency-selected of OFDM communication system.

关 键 词：正交频分复用技术 子载波 仿真 

分 类 号：TM73[电气工程—电力系统及自动化]