Link Performance of WiMAX PUSC

Author

Hsieh, Frank ; Wang, Fan ; Ghosh, Amitava

Author_Institution

Motorola Inc., Arlington Heights

fYear

2008

fDate

March 31 2008-April 3 2008

Firstpage

1143

Lastpage

1148

Abstract

Link performance of WiMAX (802.16e) downlink and uplink using partial usage subchannelization (PUSC) is evaluated through link-level simulations. WiMAX using single transmit and two receive antennas is compared to a WiMAX system with four transmit and two receive antennas with closed-loop beamforming in the downlink and one transmit and eight receive antennas in the uplink. Two dimensional channel estimators are applied to estimate the channel frequency response using pilot symbols. Spatial channel modeling method is used to model the antenna correlations between multiple transmit and the multiple receive antennas. Link simulations demonstrate that significant link performance improvements can be achieved using closed-loop beamforming for downlink and using more receive antennas for uplink.

Keywords

WiMax; channel estimation; frequency response; 2D channel estimators; 802.16e; WiMAX; channel frequency response estimation; closed-loop beamforming; link performance; link-level simulations; partial usage subchannelization; pilot symbols; receiver antennas; spatial channel modeling method; transmiter antenna; Array signal processing; Bandwidth; Communications Society; Downlink; Frequency diversity; Frequency estimation; OFDM; Receiving antennas; Tiles; WiMAX;

fLanguage

English

Publisher

ieee

Conference_Titel

Wireless Communications and Networking Conference, 2008. WCNC 2008. IEEE

Conference_Location

Las Vegas, NV

ISSN

1525-3511

Print_ISBN

978-1-4244-1997-5

Type

conf

DOI

10.1109/WCNC.2008.206

Filename

4489237