| 摘要 |
PURPOSE:To decrease the transmission data quantity, to quicken polling and response speed and to attain highly accurate plural pairs of communication by allowing each transmitter to use a set specific gold code for demodulation for modulating a transmission data. CONSTITUTION:A transmitter 1 generates (5) a gold code in response to a predetermined destination address 6, a modulator 7 modulates a transmission data and supplies the result to a power line 3. A receiver 2 uses the gold code generated in response to the predetermined self-address to demodulate a reception modulation signal. The interference of the gold code is decreased and the accuracy of plural pairs of communication is improved. |
