| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem of a MIMO system wherein multiple communication is attained with identical frequency that utilizes the difference in multiple antenna space arrangements, but has limit in the extension of the distance reached. SOLUTION: Use of 2 or more radiowaves whose polarized wave faces differ obtains communication of multiple-input multiple-output orthogonal frequency division multiple (MIMO-OFDM) by using orthogonal antennas as multiple antennas. The orthogonal antenna can employ a patch-type, Yagi type, or the like types. As polarized wave faces of the multiple radiowaves differ, extension of the distance will not seemingly make the difference of the space arrangement small caused by the extension of the distance. For this reason, the distance for multiplexed communication can be extended, or the communication speed can be maintained sufficiently high. COPYRIGHT: (C)2009,JPO&INPIT
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