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FMT和OFDM在频偏影响下的可达比特率性能比较
引用本文:王秋瑾,高振明,朱维红,高有军,许峰.FMT和OFDM在频偏影响下的可达比特率性能比较[J].山东大学学报(理学版),2005,40(4):81-85,89.
作者姓名:王秋瑾  高振明  朱维红  高有军  许峰
作者单位:山东大学,信息科学与工程学院,山东,济南,250100;山东大学,信息科学与工程学院,山东,济南,250100;山东大学,信息科学与工程学院,山东,济南,250100;山东大学,信息科学与工程学院,山东,济南,250100;山东大学,信息科学与工程学院,山东,济南,250100
基金项目:国家自然科学基金资助项目(60372029)
摘    要:滤波多音(filtered multi-tone,FMT)和正交频分复用(orthogonal frequency division multiplexing,OFDM)同属于多载波调制技术,FMT子信道频谱不重叠,OFDM子信道频谱正交.频谱特性的差异导致对各种干扰的敏感性不同.FMT技术的频谱特性使其可以有效克服信道间干扰(ICI),但需要在接收端加入有效均衡器以消除符号间干扰(ISI).OFDM的频谱正交性容易受到ICI的影响被破坏.分析AWGN环境中,频偏对FMT和OFDM系统造成的干扰,通过计算机仿真比较频偏对两种系统的可达比特率性能的影响.

关 键 词:滤波多音(FMT)  OFDM  频偏  可达比特率
文章编号:1671-9352(2005)04-0081-05
收稿时间:2004-10-27
修稿时间:2004-10-27

Performance comparison of achievable bit rate in FMT and OFDM system in the presence of frequency offset
WANG Qiu-jin,GAO Zhen-ming,ZHU Wei-hong,GAO You-jun,XU Feng.Performance comparison of achievable bit rate in FMT and OFDM system in the presence of frequency offset[J].Journal of Shandong University,2005,40(4):81-85,89.
Authors:WANG Qiu-jin  GAO Zhen-ming  ZHU Wei-hong  GAO You-jun  XU Feng
Abstract:Filtered multi-tone (FMT) modulation and orghogonal frequency division multiplexing (OFDM) modulation both belong to multicarrier modulation. The subchannels are nonoverlapping in FMT but orthogonal in OFDM, which result in different sensitivity to interference. FMT system reduces the effect of Intra/Inter channel interference, but it needs equalizer to eliminate inter symbol interference (ISI). OFDM system tends to damage the orthogonality for ICI. Through the analysis of the interference introduced by frequency offset in FMT and OFDM in AWGN environment, the performance of achievable bit rate in the presence of frequency offset by simulation is compared.
Keywords:filtered multi-tone (FMT)  OFDM  frequency offset  achievable bit rate
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