| 摘要 |
PROBLEM TO BE SOLVED: To perform communication by frequency division multiplexing systems as much as possible in power-line carrier communication using low-frequency bands. SOLUTION: A first power-line carrier communication apparatus 1 includes a preamble addition section 123 for adding synchronization signals including wide-band synchronization signals and single-frequency synchronization signals in the frequency division multiplexing system to transmission signals. A second power-line carrier communication apparatus 1 includes a synchronization detection section 16 including a wide-band synchronization signal detection section 16A and a single-frequency synchronization detection section 16B. The synchronization detection section 16 uses the detected wide-band synchronization signals to execute first synchronization establishment processing when the wide-band synchronization signals are detected, uses the detected wide-band and single-frequency synchronization signals to execute second synchronization establishment processing when the single-frequency synchronization signals are detected and the first synchronization establishment processing fails, and uses the detected single-frequency synchronization signals to execute third synchronization establishment processing when the single-frequency synchronization signals are detected and the first synchronization establishment processing is not executed. COPYRIGHT: (C)2010,JPO&INPIT
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