| 摘要 |
PURPOSE:To remarkably improve noise immunity, the number of stations and interstation interference characteristics by adding plural orthogonal series signals modulated by data to form a transmission signal. CONSTITUTION:Only one series modulated by data is sent at a time in a non- orthogonal series, but in the orthogonal series, the series is sent multiplexedly through addition in the orthogonal series by deviating the time. Thus, in case of assigning a series to one station, the station takes synchronization and the deviated time is shared to many users and plural deviated times are shared to one user. When one station is used by one user only, the repetitive number of series is increased considerably for the same spread ratio. Thus, the noise immunity and the interference between other stations are improved remarkably. |
