| 摘要 |
<p>In a wireless communication system, an approach determination section (S16, S36) determines whether a portable device (20) is inside of a nearby area (412, 422) of one of a plurality of transmitting antennas (40 - 42, 50 - 54) transmitting a primary signal. When the approach determination section determines that the portable device is inside of the nearby area, a transmission control section (30) changes a driving voltage of another one of the transmitting antennas disposed outside of the nearby area, such that a communication area (411, 421, 511, 521, 531, 541) of the another one of the transmitting antennas is increased to encompass the nearby area of the one of the transmitting antennas, and the primary signal is retransmitted from the another one of the transmitting antennas.</p> |
