| OFDM技术原理及其应用 |
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| 引用本文： | 李引凡. OFDM技术原理及其应用[J]. 信息技术与信息化, 2004, 0(5): 10-13 |
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| 作者姓名： | 李引凡 |
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| 作者单位： | 重庆通信学院通信指挥系,重庆,400035 |
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| 摘 要： | OFDM的概念诞生于20世纪50～60年代，最初主要用于军事通信。后来，人们采用DFT实现多载波调制．同时LSI的发展解决了IFFT/FFT的实现问题：随着DSP芯片技术、VISI器件的发展，格栅编码技术、软判决技术、信道自适应技术等的出现，OFDM技术开始向实际应用转化本文分析了OFDM技术的基本原理，并介绍了其实现的关键技术及应用。
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| 关 键 词： | 正交频分复用 保护间隔 同步 峰值与均值功率比 |
| 修稿时间： | 2004-05-28 |
The Princples and Applications of OFDM |
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| LI Yin-fan. The Princples and Applications of OFDM[J]. Information Technology & Informatization, 2004, 0(5): 10-13 |
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| Authors: | LI Yin-fan |
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| Abstract: | The concept of Orthogonal Fr eq uency Division Multiplexing(OFDM)was came into being in mid-1950s, it was app lied mainly to military communications at first. Afterward, Fast Fourier Transform Algorithm(FFT)was applied to Multi-Carrier Modulation(MCM)and the development of Large Scale Integration(LSI)so lved the implementation of IFFT/FFT. After the development of the DSP & VLSI and the appearance of the technologies including Trellis Code, Soft Decision, etc, O FDM was preliminary applied practically. In this paper, the basic principles of OFDM are analyzed, then the author introduces the key technologies and applicati ons of OFDM. |
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| Keywords: | OFDM Guard Period Synchronization PAPR |
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