OFDM系统中自适应调制技术的研究  

Study on adaptive modulation technique in OFDM systems

作　　者：梁伟洋[1] 冯祥[1] 

机构地区：[1]空军第一航空学院,河南信阳464000

出　　处：《电子设计工程》2010年第7期22-23,共2页Electronic Design Engineering

摘　　要：研究了正交频分得用OFDM系统中基于子载波组的自适应调制技术,提出了一种新的OFDM自适应调制策略,该策略可在上行链路发生错误时,要求重新传送信道信息,使发射机仍能根据信道的实际情况正确选择合适的调制制式,达到降低误比特率,提高系统性能的目的。A sub-bands based adaptive modulation technique in OFDM systems is studied. In order to improve the performance and low the EBR of the system,a novel adaptive tactics is proposed. As error occurred in the up-link, the channel situation is asked to re-send ,this tactics could make the transmitter could choice right modulation types by the actual channel situation.

关 键 词：OFDM 自适应调制 误比特率 性能仿真 

分 类 号：TN929[电子电信—通信与信息系统]