【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。更多还原

【Abstract】 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 carrier 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 carrier transmission technique such as 16-QAM.更多还原