| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a power line transfer communication apparatus that achieve both secure delivery of data to a distant place and high-speed large-capacity data communication using a low-frequency band. <P>SOLUTION: The power line transfer communication apparatus 1 includes a modulation unit 12 which modulates a carrier signal using one modulation system selected out of a plurality of modulation systems, a transmission unit 13 which transmits the carrier signal modulated by the modulation unit 12, a reception unit 15 which receives a response signal transmitted from another power line communication apparatus having received the carrier signal, and a control unit 17 which changes the modulation system that the modulation unit 12 uses according to whether the reception unit 15 receives the response signal. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
