一种针对802.11a/g/n系统的改进型残余频偏跟踪算法  

An Optimization Residual Frequency Offset Tracking Method for 802.11a/g/n System

作　　者：吴斌[1] 朱勇旭[1] 张振东[1] 姜鑫[1] 周玉梅[1] 

机构地区：[1]中国科学院微电子研究所,北京100029

出　　处：《微电子学与计算机》2010年第12期37-41,共5页Microelectronics & Computer

基　　金：中国科学院知识创新工程领域前沿项目(5408SF032001);新一代宽带无线移动通信网重大专项(2009ZX03007-002)

摘　　要：提出了一种适用于802.11a/g/n内接收机设计的改进型残余频偏跟踪算法,提出采用基于OFDM自带导频数据在频域进行残余频偏跟踪补偿的总体策略,采用逐次估计增量相位,对逐次估计相位和求平均,对总体相位迭代求和的方法,降低了噪声对估计精度的影响,并解决了估计相位超过[-π,π]范围的问题.全系统链路级仿真结果表明,算法能很好地降低接收机误码率.An Optimization Residual Frequency Offset Tracking Method for 802.11a/g/n System is proposed in this paper.The residual frequency offset tracking is done in the frequency domain using the pilot of the ofdm data zone is the basic strategy.The key ideals of the method are estimating the increment phase step by step,and getting the phase′s average for the summary of the incremental phase,getting the final value through iterative adding,which decrease the effect from the noise,and solving the problem when the phase is beyond ,the system link level simulation result proves that the method can improve the ber of the ofdm system effectively.

关 键 词：正交频分复用 残余频偏 频偏跟踪 相位补偿 

分 类 号：TN929.5[电子电信—通信与信息系统]