This paper gives an overview on the development of wireless communication and the orthogonal frequency division multiplexing ( ofdm ) technique . basic characters of wireless channel , transmission principles and signal frame structure design of ofdm are introduced . main non synchronization factors between ofdm transceivers are pointed out 本文介紹了無(wú)線通信與多載波正交頻分復(fù)用( ofdm )技術(shù)的發(fā)展概況,闡述了無(wú)線信道的基本特性、 ofdm的調(diào)制解調(diào)原理與信號(hào)幀結(jié)構(gòu)的設(shè)計(jì),指出了導(dǎo)致ofdm收發(fā)信機(jī)間不同步的主要因素。