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Signal correlations and diversity gain of two-beam microcell antenna

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2 Author(s)
Lempiainen, J.J.A. ; Nokia Telecommun., Finland ; Nikoskinen, K.I.

The motivation of the present study is to investigate the possibility of using two independently directed antenna beams in a mobile base station to provide diversity gain and reduce fading problems in a microcellular environment. The signal correlation of the individual antenna beams is studied, and it is shown that correlation depends on beamwidth, separation angle of the antenna beams, and the location of the base-station antenna array. Signal correlations have been computed using narrow- and wide-beam antennas in two separate base-station antenna locations. Diversity gains of both antenna types have been optimized by selecting the beam orientations which minimize the signal correlation. The numerical simulations show that a considerable diversity gain can be obtained using this approach

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Vehicular Technology, IEEE Transactions on  (Volume:47 ,  Issue: 3 )