Frequency MMSE Equalization Combined with Kalman Channel Estimation in OFDM System

Author

Xiang, Qian ; Dai, Xianhua

Author_Institution

Sch. of Inf. Sci. & Technol., Sun Yat-sen Univ., GuangZhou

Volume

2

fYear

2006

fDate

3-6 Nov. 2006

Firstpage

1751

Lastpage

1754

Abstract

To combat with the ICI caused by the Doppler and carrier frequency errors, an autoregressive (AR) process is used to model time evolution of the fading channel and a novel frequency MMSE equalizer combined with Kalman channel estimator is proposed. Combined techniques outperform traditional linear and DFT interpolation methods in both slow and fast fading conditions. The complexity of the equalizer is reduced significantly by using the fact that only a few adjacent subchannels are major interferers to a desired subchannel. Mean squared error (MSE) and bit error rate (BER) performance of the proposed algorithm are verified by computer simulation

Keywords

Kalman filters; OFDM modulation; Rayleigh channels; autoregressive processes; channel estimation; equalisers; error statistics; mean square error methods; Doppler errors; Kalman channel estimation; OFDM system; autoregressive process; bit error rate; carrier frequency errors; fading channel time evolution; frequency MMSE equalization; mean squared error; Bit error rate; Channel estimation; Computer errors; Computer simulation; Equalizers; Fading; Frequency estimation; Interpolation; Kalman filters; OFDM;

fLanguage

English

Publisher

ieee

Conference_Titel

Computational Intelligence and Security, 2006 International Conference on

Conference_Location

Guangzhou

Print_ISBN

1-4244-0605-6

Electronic_ISBN

1-4244-0605-6

Type

conf

DOI

10.1109/ICCIAS.2006.295361

Filename

4076267