| 摘要 |
PROBLEM TO BE SOLVED: To enhance error rate characteristics by improving a communication state in power line. SOLUTION: A transmitter Tx is connected to both transmission paths 31A, 31B, e.g. at a single-phase three-line power line portion, and a receiver Rx is connected to any one of the transmission paths 31A, 31B. The transmitter Tx transmits signals s1(t), s2(t) to the transmission paths 31A, 31B to which the transmitter Tx is connected, respectively. The receiver Rx receives a first transmission signal s1(t) which is directly transmitted from the transmitter Tx to the first transmission path 31A and a second transmission signal s2(t) which is indirectly transmitted, on the first transmission path 31A. The distribution of carriers to be used for the respective signals s1(t) and s2(t) is adaptively optimized according to the transmission characteristics of the respective transmission paths. The transmission signals s1(t), s2(t) which are interleaved by mutually different methods, are transmitted onto the transmission paths, thereby improving the error rate property. COPYRIGHT: (C)2005,JPO&NCIPI
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