An Adaptive Channel Estimation Method Based on Doppler Shift Estimation in mobile WIMAX

Author

Peizhi, Liu ; Xiaoguang, Wu ; Weiqiang, Zhang ; Hao, Zhang

Author_Institution

Beijing Univ. of Post & Telecommun., Beijing

fYear

2007

fDate

23-26 Oct. 2007

Firstpage

315

Lastpage

319

Abstract

An adaptive channel estimation method in 802. 16 e system, based on Doppler shift estimation, is proposed. The coherence time can be gotten through Doppler shift estimation. Then the time domain channel impulse response (CIR) gotten by least squares (LS) algorithm can be refined according to the correlation duration the coherence time. The simulation results in the frequency band of 2.4 GHz show that the proposed method achieves a good bit error rate (BER) performance according to the speed variance of the vehicles.

Keywords

Doppler shift; WiMax; adaptive estimation; channel estimation; error statistics; least squares approximations; mobile radio; time-domain analysis; transient response; 802. 16e system; BER; CIR; Doppler shift estimation; adaptive channel estimation method; bit error rate; frequency 2.4 GHz; least squares algorithm; mobile WiMAX; time domain channel impulse response; AWGN; Bit error rate; Channel estimation; Delay; Demodulation; Doppler shift; Frequency estimation; OFDM; Protocols; WiMAX; Doppler shift; OFDM; channel estimation; coherence time; least squares;

fLanguage

English

Publisher

ieee

Conference_Titel

Electromagnetic Compatibility, 2007. EMC 2007. International Symposium on

Conference_Location

Qingdao

Print_ISBN

978-1-4244-1371-3

Electronic_ISBN

978-1-4244-1372-0

Type

conf

DOI

10.1109/ELMAGC.2007.4413494

Filename

4413494