摘要
同步是OFDM系统的基本技术。介绍了时域相关获得突发及符号同步的方法,以及频域差分调制快速估计整数频偏和小数频偏的方法。依据估计结果对频偏进行补偿,可保证采用廉价晶振所实现系统的解调性能。同步捕获后则通过锁相环技术跟踪长突发的同步变化。
Synchronization is basic technology of OFDM system. Two methods are introduced, one is correlation in time domain to capture burst and symbol, another one is differential modulation in frequency domain to estimate integral frequency offset and fractional frequency offset rapidly. The frequency offset is compensated according to the estimated result. After attaining synchronization, the phase offset due to frequency offset estimation error is tracked with a phase locked loop.
出处
《无线电工程》
2007年第4期45-47,共3页
Radio Engineering
作者简介
段有为男，（1966-），中国电子科技集团公司第54研究所工程师。主要研究方向：微波散射通信总体。
