摘要
随着正交频分复用技术(OFDM)的日益成熟,它在现实生活中的应用的范围也越来越广泛了。OFDM技术现在不仅广泛的应用在数字广播、数字电视中,而且由于其具有抗多径衰落,频谱利用率高,传输速度快的优点,被普偏认为是第四代移动通信物理层的关键技术之一,它能够同时为多个用户提供高数据速率的视频和语音服务。主要是针对基于802.16e标准的OFDM的不同调制解调方式在不同信道中传输的优缺点进行研究比较。
With its gradually maturing,the orthogonal frequency division multiplexing（OFDM） is extensively applied in the real life.OFDM technology is now widely used in digital broadcasting,digital television,and also for its resistance to multipath fading,high spectrum efficiency,and transmission speed,is reguarded as the key technology to the physical layer of the 4G mobile communications.It could simultaneously provide high data-rate video and voice services for multiple users.This article mainly compares the advantages and disadvantages of the 802.16e standard-based OFDM modulation and demodulation with different ways in different transmission channels.
出处
《通信技术》
2012年第2期68-70,共3页
Communications Technology
关键词
正交频分复用
信道
调制解调
OFDM（Orthogonal Frequency Division Multiplexing）
channel
modem
