Experimental Evaluation of an Adaptive Antenna for a
TDMA Mobile Telephony System
PIMRC' 97 , Helsinki, September 1-4 1997 ,© 1997 IEEE
Using adaptive antennas in telecommunication has several benefits. The
coverage can be extended by using an array of antennas instead of a single
base station antenna. Alternatively can the transmitted power be reduced.
The capacity and quality can be improved by suppressing interfering signal
sources and this capacity improvement is obtained by reducing the reuse
factor (i.e. the distance between two cells using the same frequency set).
We have designed and built an adaptive antenna test bed for the DCS-1800
Measurements of an SMI adaptive DCS-1800 base station antenna, used in
uplink only, are presented and analysed. Both laboratory measurements and
outdoor field trials have been performed. The antenna is improving the
C/I ratio more than 30 dB. Calculations using measured data, assuming downlink
performance equal to that of the uplink, show a spectral efficiency gain
of 6 over present base station systems.
Design and Evaluation of a Fully Adaptive Antenna for Telecommunication
Antenn 97 conference, Abstract
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