Development of Interference Cancellation Method using Adaptive Array Antenna for Uplink OFDMA in Mobile WiMAX

Author

Hirakawa, Mitsuru ; Yamamoto, Takashi ; Okada, Yoji ; Sugimoto, Mitsuo

Author_Institution

Inf. & Commun. Labs., Sumitomo Electr. Ind., Ltd., Osaka

fYear

2009

fDate

26-29 April 2009

Firstpage

1

Lastpage

5

Abstract

In this paper, we propose an adaptive array to suppress interference signals for uplink OFDMA in mobile WiMAX. Uplink user data is distributed over the bandwidth and the channel state changes instantly so it is difficult to apply a conventional algorithm. To solve this problem, adaptive weight is calculated on a "tile-by-tile" basis in the proposed method. In our simulation and experiments, compared to conventional Zero- Forcing (ZF) algorithm, the proposed algorithm can realize better reception quality.

Keywords

OFDM modulation; WiMax; adaptive antenna arrays; frequency division multiple access; interference suppression; mobile radio; wireless channels; OFDMA; adaptive array antenna; interference cancellation method; mobile WiMAX; orthogonal frequency division multiple access system; wireless channel; Adaptive arrays; Antenna arrays; Base stations; Frequency conversion; Interference cancellation; Mobile antennas; OFDM; Signal processing; Transmitters; WiMAX;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference, 2009. VTC Spring 2009. IEEE 69th

Conference_Location

Barcelona

ISSN

1550-2252

Print_ISBN

978-1-4244-2517-4

Electronic_ISBN

1550-2252

Type

conf

DOI

10.1109/VETECS.2009.5073496

Filename

5073496