| 摘要 |
PURPOSE:To provide a spatial transmission method capable of reducing interference among channels and maintaining the improved quality of communication in the case of using a spread spectrum communication system, turning the channels to plural by code division multiple access and performing the communication by spatial transmission. CONSTITUTION:In a spatial transmission system provided with plural communication stations 201 and a centralized control station 203, when the communication station 201 performs transmission to the other communication station 201, a channel request signal is sent to the centralized control station 203 and the setting of a communication timing is requested. The centralized control station 203 refers to the spread signal and the communication timing of the channel during the communication at present with the reception of the channel request signal as a trigger and sets the optimum communication timing of the communication station 201 with the channel request at the approximately middle of a longest section among the sections where the mutual correlation value of spreading codes among the channels becomes minimum. |
