OFDM技术概述

An Introduction to OFDM

OFDM技术是一种高频带利用率的多载波调制技术,它在提高频带利用率的同时,也能有效地抵抗字符间干扰。目前OFDM技术已经被广泛应用于广播式的音频、视频领域和民用通信系统。在OFDM系统中引入了正交的子载波,使得它的频带利用率比以前任何一种调制技术都要高,第四代移动通信系统计划以OFDM为技术核心提供增值服务,它在宽带领域有很大的潜力。

Orthogonal Frequency Division Multiplexing (OFDM) is an effective multi-carrier modulation technique, which appeared in 19605.It has been applied to many fields, such as broadcasting, TV and public communication systems. Orthogonal carriers was used in OFDM system,which increases the efficiency of frequency-band. The 4G mobile communication system plans to supply boomed service with OFDM technique. The technique of OFDM has great potential in wideband field.