高动态OFDM系统帧结构及参数设计  

Frame Structure and Parameter Design for High Dynamic OFDM Systems

作　　者：曾彭[1] 纪金伟 

机构地区：[1]中国电子科技集团公司第五十四研究所,河北石家庄050081

出　　处：《无线电通信技术》2017年第4期47-51,共5页Radio Communications Technology

基　　金：国家高技术研究发展计划(863计划)项目(2013AA122904)

摘　　要：正交频分复用(OFDM)系统具有频带利用率高、抗多径衰落性能好等优点,然而OFDM系统对载波频率偏移比较敏感,抗频偏性能差。针对高动态环境下的应用场景,给出了一种适用的OFDM系统传输方案,并对帧结构及相关参数进行设计,最后对决定系统性能的参数进行了仿真分析。结果表明帧长越短系统性能越好;每帧OFDM符号数越少、带宽越宽、FFT点数越少,系统性能也越好。OFDM has obvious advantages of high spectral efficiency and good performance of resistance to multipath fading,but it is sensitive to frequency shift. Considering the high dynamic environment,a system scheme of OFDM is proposed,and its frame structure and related parameters are designed. In addition,the parameters that determine the system performance are also analyzed. The results show that the system performs better with shorter symbols,wider band,fewer FFT points and shorter frame time. It provides an important guidance for the parameter selection optimization of high dynamic environment applications.

关 键 词：正交频分复用 帧结构 高动态 参数优选 

分 类 号：TP911.7[自动化与计算机技术]