| 摘要 |
The present invention aims at ensuring both delayed wave resistance and fading resistance in good balance. A delay time measuring unit measures delay time determined based on a time point of a subcarrier out of a plurality of subcarriers arriving first and a time point of another subcarrier arriving through multipath at each predetermined time interval. A mode selector selects a mode out of a plurality of modes formed as combinations of a subcarrier interval representing an interval between mutually adjacent subcarriers out of the plurality of subcarriers and the guard interval depending on a length of the delay time. A first mode processor, a second mode processor or a third mode processor executes transmission and reception of a transmission signal by use of the selected mode.
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