新一代移动通信的核心技术OFDM调制技术  

Key Technology OFDM Modulation in New Generation Mobile Communication

作　　者：山长军[1] 王友权[1] 庄雪晶[1] 

机构地区：[1]吉林工业职业技术学院,吉林吉林132013

出　　处：《现代电子技术》2007年第19期34-37,共4页Modern Electronics Technique

摘　　要：作为4G中的关键技术,正交频分复用(OFDM)把信道分成许多正交子信道,各子信道之间保持正交,频谱相互重叠,这样减少了子信道间干扰,提高了频谱利用率。对OFDM系统的实现进行了研究设计,给出了一个基于FFT算法的系统实现方案,介绍了作为4G关键技术的OFDM调制技术的发展状况,阐述了其基本原理及两个关键问题同步问题和PAPR问题的解决方法。As a key technique of 4G, OFDM divided channels into many orthogonal sub - channels, which are orthogonal and overlapping each other, thus, the inter- sub- channel interferences can be decreased and the utilization of frequency spectrum be increased. This paper designs a scheme of realizing OFDM system based on FFT algorithm, provides the development of OFDM a key technology in 4 G, the basic principles of OFDM technology and two mind problems - synchronization and PAPR.

关 键 词：正交频分复用 快速傅里叶变换 循环前缀 时频同步 峰一平功率比 

分 类 号：TN914[电子电信—通信与信息系统]