一种OFDM小数倍和整数倍频偏联合估计方法  

An OFDM Fractional & Integer Frequency Offset Joint Estimation Method

作　　者：吴斌[1] 张振东[1] 周玉梅[1] 朱勇旭[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》2011年第1期16-22,共7页Microelectronics & Computer

基　　金：国家科技重大专项(2009ZX03007-002-03)

摘　　要：提出了一种通过峰值联合检测和频偏联合计算实现快速、宽范围、高精度、鲁棒性的频偏联合估计方法.采用并行双自相关器和鲁棒性的自相关峰值检测机制实现相关峰值的联合检测.采用频偏取值状态控制器和取值执行器完成包括小数倍和整数倍频偏的精确估算.该方法在WLAN接收机系统的频偏仿真测试表明,在IEEETGN多径信道A～F条件下,峰值检测正确率达100%(SNR>5),频偏估计均方误差<10-2.12(误差SNR>10),频偏估计范围达正负2.5倍子载波频率间隔.A joint estimation method for the peak detection frequency offset calculation is derived which is quick,large scale,high precision,and robust.The correlation peak is detected by the double auto-correlator robutst auto-correlating method for the fractional integer frequency offset.The correct estimation frequency offset is got by the frequency offset status utility the frequency offset operator.The method is simulated in the wlan receiver,in the IEEE TGN multipath channel Mode A～F,the peak detect correct rate is 100%（SNR5）,the precision is less than 10-2.12（SNR10）,the estimate scale is positive negative 2.5 times carrier frequency unit.

关 键 词：正交频分复用 频率同步 小数倍频偏 整数倍频偏 

分 类 号：TN929.5[电子电信—通信与信息系统]