《软件无线电》中整数倍载波频偏估计研究

Integer Carrier Frequency Offset Estimation Algorithm Based on Course of Software Radio

在《软件无线电》课程中,载波频偏估计是软件无线电系统的重要的处理过程。该文针对软件无线电中所讲述的基本频偏估计方法,提出了一种适用于正交频分多路复用技术((OFDM)系统的IFO整数倍载波频偏估计方法。利用OFDM系统中特有的同步符号,对前后不同数据码元进行共轭相乘来完成整数倍载波频偏的估计。计算机仿真结果表明,该算法准确性高,运算复杂度低。

In the course of Software Radio,the carrier Frequency Offset is one of the most important procedures in the software radio system.For the basic method described in the course of Software Radio,a new IFO estimation is proposed for OFDM system.IFO is estimated with the synchronization signal which is a special part of OFDM.The new method accomplishes IFO by using conjugate multiplication between adjacent symbols.Simulation results show that the new algorithm can get precise IFO and low complexity.