摘要
OFDM(正交频分复用)是一种无线环境下的高速传输技术,它对由于无线信道的多径传播引起的ISI(符号间干扰)有很强的抵抗能力,已经引起了人们的广泛关注。文中首先介绍了OFDM技术的应用、发展以及基本原理,然后在计算机上用MATLAB对其性能进行了仿真,仿真中将OFDM与传统的单载波调制方式——16QAM(正交幅度调制)对抗多径干扰的性能进行了比较,结果表明OFDM技术更适合于在有多径干扰存在的无线信道中传输。
Orthogonal Frequency Division Multiplexing （OFDM） is the modulation technique for wireless communications,for OFDM can effectively combat Inter-Symbol Interference （ISI） caused by multipath channel,it has gained much of people＇ s interest. The paper introduces the application, development and basic principle about OFDM, then it presentes the OFDM technique simulation performance using MATLAB. In order to compare OFDM to a traditional single cartier communication system, a Quadrature Amplitude Modulation（16-QAM） simulation has been performed as well, the MATLAB simulation proves that OFDM is better suited to a multipath channel than a single cartier transmission technique such as 16-QAM.
出处
《电子工程师》
2005年第8期27-31,共5页
Electronic Engineer
