论文信息 - Doppler spread estimation for mobile OFDM systems in Rayleigh fading channels

Doppler spread estimation for mobile OFDM systems in Rayleigh fading channels

In this paper, a technique based on the autocorrelation function is proposed to estimate the Doppler spread in Rayleigh fading channels for mobile OFDM systems. It is simply implemented with the cyclic structure of OFDM symbols, and any other additive data and pilots need not to be inserted into the common OFDM symbols. This algorithm can be applied directly to the OFDM system with transmit diversity (TD) and to MIMO OFDM systems. Computer simulation results are included to support our developments in the terms of mean estimation value and mean square error.

Zan Li | Wentao Song | Jueping Cai

[1] Heinrich Meyr,et al. Optimum receiver design for wireless broad-band systems using OFDM. I , 1999, IEEE Trans. Commun..

[2] Nelson Ray Sollenberger,et al. Beyond 3G: wideband wireless data access based on OFDM and dynamic packet assignment , 2000, IEEE Commun. Mag..

[3] D. E. Amos. Algorithm 644: A portable package for Bessel functions of a complex argument and nonnegative order , 1986, TOMS.

[4] D. E. Amos,et al. A remark on Algorithm 644: “A portable package for Bessel functions of a complex argument and nonnegative order” , 1995, TOMS.

[5] Shousheng He,et al. Effective SNR estimation in OFDM system simulation , 1998, IEEE GLOBECOM 1998 (Cat. NO. 98CH36250).

[6] Young-Chai Ko,et al. Doppler spread estimation in mobile communication systems , 2002, Vehicular Technology Conference. IEEE 55th Vehicular Technology Conference. VTC Spring 2002 (Cat. No.02CH37367).

[7] T. Aulin. A modified model for the fading signal at a mobile radio channel , 1979, IEEE Transactions on Vehicular Technology.

[8] Che-Ho Wei,et al. A low-complexity frame synchronization and frequency offset compensation scheme for OFDM systems over fading channels , 1999 .

[9] Jack M. Holtzman,et al. Adaptive averaging methodology for handoffs in cellular systems , 1995 .