摘要
正交频分复用技术(OFDM)利用相互正交的多个子载波束传送信息,具有高的频谱利用率和良好的抗多径干扰能力,已被应用于数字音频广播、高清晰度电视和无线局域网等方面,并且被看作是第四代移动通信的核心技术之一。介绍了OFDM的基本原理、信号收发器和加载算法,并在分析了这一技术的优缺点后,展望了它的发展前景。
OFDM transmits informa-tion through orthogonal multiple sub-carriers.It has high spectrum utilization and good capability to prevent from multi-path interference.It has been used in digital voice broadcast,HDTV and WLAN and is regarded as one of the core technologies in4G mobile communication system.Basic principles of OFDM,signal transceiver and load arithmetics are introduced.Its develop-ing foreground is overviewed after the analysis of the advantages and disadvan-tages of this technology.
出处
《现代电信科技》
2003年第6期27-31,共5页
Modern Science & Technology of Telecommunications
