| 摘要 |
<p>PROBLEM TO BE SOLVED: To communicate information without being affected by other master set or slave set between a one-to-one relation of a master set and slave set, even when a plurality of master sets and slave sets exist in the communication of information among the master sets and the slave sets. SOLUTION: A 1st spread modulation signal generating means 101 in a master set 100 uses a code information signal generating means 104 to generate a spread modulation signal. The generated signal is given to an ASK modulation means 102, in which ASK modulation is applied to the signal, and the resulting signal is sent from a 1st transmission antenna 103. The master set uses the spread modulation signal in this way, even when a plurality of master sets are installed adjacent to each other, so that crosstalk is prevented by making spread modulation signals of the master sets different.</p> |
