Highly Time Varying Channel Estimation for OFDMA Uplink Transmission in IEEE 802.16e Network

Author

Rabbi, Mohammad Fazle ; Hou, Shengwei ; Ko, C.C.

Author_Institution

Dept. of Electr. & Comput. Eng., Nat. Univ. of Singapore, Singapore

fYear

2009

fDate

4-7 Feb. 2009

Firstpage

6

Lastpage

11

Abstract

Basis expansion model (BEM) based estimation is studied for highly time varying OFDMA uplink channel. We consider two popular pilot patterns-pilot placed over frequency-time grid as proposed in IEEE 802.16e standard and pilot placed on the time axis. In a high Doppler spread scenario, taking intercarrier interference (ICI) impact from data block into account, least square (LS) estimator is developed for both time and frequency domain pilot aided estimation. From the performance analysis and simulation result, it is shown that, time domain LS (LS-T) estimator performs better than the current frequency domain estimator. The computational complexity for time domain LS is also discussed.

Keywords

OFDM modulation; WiMax; channel estimation; computational complexity; frequency division multiple access; frequency-domain analysis; intercarrier interference; least squares approximations; time-domain analysis; time-varying channels; Doppler spread scenario; IEEE 802.16 network; OFDMA uplink transmission; WiMax; basis expansion model; computational complexity; frequency domain pilot aided estimation; intercarrier interference; least square estimator; orthogonal frequency division multiple access; pilot patterns-pilot; time domain pilot aided estimation; time varying channel estimation; Analytical models; Channel estimation; Computational complexity; Computational modeling; Frequency domain analysis; Frequency estimation; Interference; Least squares approximation; Performance analysis; Time domain analysis; Channel estimation; IEEE 802.16e; OFDMA uplink; Time varying channel;

fLanguage

English

Publisher

ieee

Conference_Titel

Communications Theory Workshop, 2009. AusCTW 2009. Australian

Conference_Location

Sydney, NSW

Print_ISBN

978-1-4244-3356-8

Electronic_ISBN

978-1-4244-3357-5

Type

conf

DOI

10.1109/AUSCTW.2009.4805591

Filename

4805591