基于802.11a的OFDM符号起始位置估计算法  

OFDM Start Position Estimation Algorithm Based on 802.11a

作　　者：陈华婵[1] 孙卫真[1] 

机构地区：[1]首都师范大学信息工程学院,北京100037

出　　处：《中国海洋大学学报（自然科学版）》2008年第S1期207-210,共4页Periodical of Ocean University of China

基　　金：国家自然科学基金项目"基于动态Bayesian网络的企业战略决策模型研究"(60773130)资助

摘　　要：OFDM(Orthogonal Frequency Divided Multiplication,正交频分复用)技术具有很高的频谱利用率和较好的抗多径衰落,在WLAN 802.11a/g,Wimax,高清数字电视广播和3Gpp-LTE等通信中都采用OFDM技术。OFDM通过循环前缀来抑制符号间干扰。基于802.11a无线帧结构,提出1种基于相关累加的OFDM符号起始位置估计算法,最大程度抑制OFDM符号间干扰(ISI,Inter Symbol Interfernce)。The OFDM technique is widely used in WLAN 802.11a, wimax,HD-DVB and 3Gpp-LTE for its advantages of high frequency usage efficiency and robustness to multi-path fade.In OFDM,cyclic prefix is inserted to the OFDM symbol to reduce inter symbol interference.In this paper an OFDM start position estimation algorithm based on correlation accumulation is provided to reduce the inter symbol interference as much as possible and is applied to WLAN 802.11a.

关 键 词：正交频分复用 符号间干扰 起始位置 

分 类 号：TN919.3[电子电信—通信与信息系统]