| 摘要 |
An antenna arrangement comprising at least 4 upright omnidirectional antenna is disclosed. The omnidirectional antennas are spaced apart in an irregular fashion. By providing at least 4 omnidirectional antenna in a irregular spaced apart arrangement, spatial diversity is provided, at any distant point from the antennas, by at least 3 antennas. Thus the minimum gain, for a four antenna arrangement, approaches 0.75 of the maximum gain when taking relative position of a receiver into account. A method of operating such an omnidirectional antenna scheme is also disclosed
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