| 基于OFDM的移动通信研究与应用 |
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| 引用本文： | 司亚军.基于OFDM的移动通信研究与应用[J].计算机与网络,2008,34(14):35-37. |
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| 作者姓名： | 司亚军 |
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| 作者单位： | 河北教育音像出版社,河北石家庄050000 |
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| 摘 要： | 移动通信信道是现代通信系统中最为复杂的信道，OFDM（正交频分复用）作为一种有效对抗符号间干扰的高速传榆技术备受瞩目。OFDM技术是一种高效并行多栽波传输技术。它将所传送的高速率串行数据分解并调制到多个并行的正交子信道中，从而使每个子信道的码元宽度大于信道时延扩展，可以最大限度地利用频谱资源。OFDM目前的应用一般限于无线本地局域网（WLAN）和有线电话网上基于现有铜双绞线的非对称高比特率数字用户技术（如ADSL），而要把它应用于4G移动通信的物理层，还存在许多挑战。
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| 关 键 词： | OFDM移动通信 多普勒频移 ISI调制 |
Fundamental and Advantages & Disadvantages of Mobile Communications Based On OFDM |
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| SI Ya-jun.Fundamental and Advantages & Disadvantages of Mobile Communications Based On OFDM[J].China Computer & Network,2008,34(14):35-37. |
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| Authors: | SI Ya-jun |
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| Affiliation: | SI Ya-jun (Hebei Education Audio-Video Press,Shijiazhuang Hebei,050000,China) |
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| Abstract: | The mobile communication channel is one of the most complex ones in modem communication system.OFDM, which is robust to ISI(Inter Symbol Interference)in the high speed transmission system,has attracted more attention.OFDM is a parallel multi-carrier technology with high efficiency.After it decomposes the high-speed serial data,it modulates the data into several parallel orthogonal sub-channels.Thus,the symbol width of each sub-channel is greater than the delay of channel,the use of spectrum is maximized.Cur... |
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| Keywords: | OFDM mobile communication Doppler shift ISI modulation |
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