Real-time smart antenna processing for GSM1800 base station

Author

Kuchar, Alexander ; Taferner, M. ; Tangemann, Michael ; Hoek, Cornelis ; Rauscher, Wolfgang ; Strasser, Martin ; Pospischil, Gunther ; Bonek, Ernst

Author_Institution

Inst. fur Nachrichtentech. und Hochfrequenztech., Tech. Univ. Wien, Austria

Volume

1

fYear

1999

fDate

36342

Firstpage

664

Abstract

We successfully implemented a smart antenna array processor for a GSM1800 base station. The entire array processing run-time is only 1 ms, allowing real-time adaptation of the antenna pattern every GSM frame. The array processing is based on the estimation of the DOAs in the uplink. Separate DOA trackers for uplink and downlink, angular selection diversity, and beamforming with broad nulls guarantee robustness in mobile radio channels. Measurements in a LOS scenario show that the DOA estimation accuracy is on the order of 1° for 0 dB input SNR. BER measurements confirm the expected signal-to-noise gain of ≈9 dB compared to the single antenna case. In case of one interferer a BER of 1% is reached for an input C/I of -6.5 dB

Keywords

AWGN channels; adaptive antenna arrays; antenna radiation patterns; array signal processing; cellular radio; cochannel interference; direction-of-arrival estimation; error statistics; interference suppression; radio links; real-time systems; AWGN channel; BER measurements; DOA estimation accuracy; DOA trackers; GSM frame; GSM1800 base station; LOS measurements; adaptive antenna array processor; angular selection diversity; antenna pattern; array processing run-time; beamforming; broad nulls; cochannel interference suppression; downlink; input C/I; input SNR; mobile radio channels; real-time adaptation; real-time smart antenna processing; signal-to-noise gain; smart antenna array processor; uplink; Adaptive arrays; Antenna arrays; Antenna measurements; Array signal processing; Base stations; Bit error rate; Direction of arrival estimation; Downlink; GSM; Runtime;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference, 1999 IEEE 49th

Conference_Location

Houston, TX

ISSN

1090-3038

Print_ISBN

0-7803-5565-2

Type

conf

DOI

10.1109/VETEC.1999.778239

Filename

778239