| 摘要 |
PURPOSE: A method and an apparatus for ranging or positioning are provided to estimate a distance by time diversity, space diversity, and balance effect between antennas using multiple antennas which capable of switching per each transceivers. CONSTITUTION: A multiple antenna(210) has a linear array structure of arranging antenna on a straight line or a planar grid array structure which is regularly arranged on a coplanar plane. A switch(220) selects one antenna of a plurality of antennae. A transceiver(230) transmits and receives a packet through one antenna selected by the switch.
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