通信技术

正交频分复用(OFDM)是一种无线环境下的高速数据传输技术,它采用相互正交的多载波传递信息,具有很强的抗干扰、抗衰落能力及较高的频谱利用率,被认为是未来无线宽带接入系统的基本实现技术之一。首先对ODFM技术的原理和发展历史加以介绍,阐述了OFDM技术的优势和劣势,然后着重阐述了OFDM技术在移动通信领域的典型应用,以及OFDM在几种主流通信体制中发挥的作用。最后,讨论了OFDM技术的发展方向。

The OFDM is a kind of high-speed data transmission technology in wireless environment. It uses orthogonal multi-carrier to transfer information, and with advantages of anti-jamming, anti-fading and high Spectrum utilization, is regarded as one of the basic broadband access technologies. This paper first makes a brief introduction of the theory and history of OFDM technology, including its characters, then discusses its typical applications in mobile communication system its important role in several principal communication systems. Finally, it tells of the future development of OFDM technology.