Title :
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
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;
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
DOI :
10.1109/ELMAGC.2007.4413494
