摘要
OFDM的概念诞生于20世纪50～60年代,最初主要用于军事通信。后来,人们采用DFT实现多载波调制,同时LSI的发展解决了IFFT/FFT的实现问题。随着DSP芯片技术、VLSI器件的发展,格栅编码技术、软判决技术、信道自适应技术等的出现,OFDM技术开始向实际应用转化。本文分析了OFDM技术的基本原理,并介绍了其实现的关键技术及应用。
The concept of Orthogonal Fr eq uency Division Multiplexing(OFDM)was came into being in mid-1950s, it was app lied mainly to military communications at first. Afterward, Fast Fourier Transform Algorithm(FFT)was applied to Multi-Carrier Modulation(MCM)and the development of Large Scale Integration(LSI)so lved the implementation of IFFT/FFT. After the development of the DSP & VLSI and the appearance of the technologies including Trellis Code, Soft Decision, etc, O FDM was preliminary applied practically. In this paper, the basic principles of OFDM are analyzed, then the author introduces the key technologies and applicati ons of OFDM.
出处
《信息技术与信息化》
2004年第5期10-13,共4页
Information Technology and Informatization
