Adaptive Array Processing for Time-Varying Interference Mitigation in IEEE 802.16 Systems

Author

Nicoli, M. ; Sala, M. ; Simeone, O. ; Sampietro, L. ; Santacesaria, C.

Author_Institution

DEI, Politecnico di Milano, Milan

fYear

2006

fDate

11-14 Sept. 2006

Firstpage

1

Lastpage

5

Abstract

In this work, we propose an adaptive technique for interference mitigation based on minimum variance distortionless response (MVDR) beamforming for the uplink of a WiMAX-compliant system. This method is designed to cope with time-varying interference due to the asynchronous access of users in the neighboring cells. Channel parameters needed for beamforming are obtained by exploiting both the preambles in the transmitted frames and the pilot subcarriers embedded in each information-bearing OFDM symbol. The effectiveness of the proposed technique is shown through numerical simulations of a standard WiMAX uplink over standard multipath channels

Keywords

OFDM modulation; WiMax; adaptive signal processing; array signal processing; multipath channels; radiofrequency interference; IEEE 802.16 systems; WiMAX-compliant system; adaptive array processing; asynchronous access; channel parameters; information-bearing OFDM symbol; minimum variance distortionless response; multipath channels; time-varying interference mitigation; Array signal processing; Base stations; Covariance matrix; DSL; Interference; Microwave technology; Numerical simulation; OFDM; Time varying systems; WiMAX;

fLanguage

English

Publisher

ieee

Conference_Titel

Personal, Indoor and Mobile Radio Communications, 2006 IEEE 17th International Symposium on

Conference_Location

Helsinki

Print_ISBN

1-4244-0329-4

Electronic_ISBN

1-4244-0330-8

Type

conf

DOI

10.1109/PIMRC.2006.254333

Filename

4022490