A FREQUENCY OFFSET ESTIMATION ALGORITHM FOR OFDM SYSTEMS  

作　　者：Fang Zhi Xiao Wan＇ang Shi Yin 

机构地区：[1]Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China [2]Graduate University of the Chinese Academy of Sciences, Beijing 100039, China

出　　处：《Journal of Electronics(China)》2008年第1期1-6,共6页电子科学学刊（英文版）

摘　　要：A new fine carrier frequency offset estimation algorithm in Orthogonal Frequency Division Multiplexing (OFDM) system is proposed. The correlation item is the training sequence instead of the received signal in the new algorithm. Simulation results show that the performance of the new algo- rithm is 4dB-9dB better than that of Schmidl's algorithm. Coarse frequency offset estimation is also discussed in this paper, which is the improvement of Zhang's method. The estimation range using the improvement method is twice as that using the Zhang's method. Based on the hardware of the receiver and the improved algorithm, a method using Fast Fourier Transform (FFT) is proposed to implement the coarse frequency estimation. The chip area of OFDM system can be reduced by using the proposed method.A new fine carrier frequency offset estimation algorithm in Orthogonal Frequency Division Multiplexing （OFDM） system is proposed. The correlation item is the training sequence instead of the received signal in the new algorithm. Simulation results show that the performance of the new algorithm is 4dB-9dB better than that of Schmidl＇s algorithm. Coarse frequency offset estimation is also discussed in this paper, which is the improvement of Zhang＇s method. The estimation range using the improvement method is twice as that using the Zhang＇s method. Based on the hardware of the receiver and the improved algorithm, a method using Fast Fourier Transform （FFT） is proposed to implement the coarse frequency estimation. The chip area of OFDM system can be reduced by using the proposed method.

关 键 词：Orthogonal Frequency Division Multiplexing （OFDM） Frequency offset estimation Fast Fourier Transform （FFT） 

分 类 号：TN911.23[电子电信—通信与信息系统]