A FREQUENCY OFFSET ESTIMATION ALGORITHM FOR OFDM SYSTEMS

被引：0
作者：
Fang Zhi * ** Xiao Wan’ang * ** Shi Yin* *(Institute of Semiconductors
机构：
来源：
Journal of Electronics(China) | 2008年 / 01期
关键词：
Orthogonal Frequency Division Multiplexing (OFDM); Frequency offset estimation; Fast Fourier Transform (FFT);
D O I：
暂无
中图分类号：
TN919.3 [数据传输技术];
学科分类号：
0810 ; 081001 ;
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.
引用
收藏
页码：1 / 6
页数：6
相关论文
共 9 条
  • [1] John Thomson.An integrated 802.11a baseband and MAC processor. IEEE International Solid-State Circuits Conference . 2002
  • [2] Wireless LAN medium access control and physical layer specification. IEEE Standard Dept. IEEE Standard 802． 11 . 1999
  • [3] Ufuk Tureli,Hui Liu,and Michael D. Zoltowski.OFDM blind carrier estimation: ESPRIT. IEEE Trans. on Commun . 2000
  • [4] Zhang,Z.,Jiang,W.,Zhou,H.High accuracy frequency offset correction with adjustable acquisition range in OFDM systems. IEEE Transactions on Communications . 2005
  • [5] T. M. Schmidl,and D. C. Cox.Robust frequency andtiming synchronization for OFDM. IEEE Trans. on Commun . 1997
  • [6] H. Bolcshei.Blind estimation of symbol timing and carrier frequency offset in wireless OFDM systems. IEEE Trans. on Commun . 2001
  • [7] Van de Beek J J,Sandell M,Borjesson P O.ML Estimation of Time and Frequency Offset in OFDM Systems. IEEE Transactions on Signal Processing . 1997
  • [8] MOOSE P H.A technique for orthogonal frequency division multiplexing frequency offset correction. IEEE Transactions on Communications . 1994
  • [9] J. Zhang,G. S. Liao,J. Wang.Efficient Frequency Offset Resolution for OFDM Systems Based on ML Principle. IEEE Transactions on Consumer Electronics . 2004
1