| 摘要 |
The invention discloses a system ( 200 ) for cellular mobile telephony, comprising a base station antenna ( 500, 600, 700 ) and a plurality of cells ( 203, 310, 320, 330 ). Each cell has an area defined by an azimuth (alpha<SUB>1</SUB>, a<SUB>2</SUB>) and a range (R<SUB>0 </SUB>R'), and the first ( 310 ) and second ( 320 ) cell cover respective areas, said areas being defined by first (alpha<SUB>1</SUB>,) and second (alpha<SUB>2</SUB>) azimuths and first and second ranges (R<SUB>o</SUB>) respectively. The first and second cells are essentially adjacent to each other in azimuth, and the system also comprises a third cell ( 203, 330 ) with an area coverage defined by a third azimuth and a third range (R'). The third azimuth is essentially the same as, and coinciding with, the total azimuths of the first and the second cell, but the third cell has a range coverage which is much smaller than the first or second range coverages.
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