| 摘要 |
<p>PROBLEM TO BE SOLVED: To enable dynamic code changes by notifying the change of a spreading code from the transmitting side to the receiving side and changing the spreading code, so as to reduce interference between the channels in communication while communication between a base station and a terminal is performed. SOLUTION: Since changes in an inverse spread code is required on the receiving side as well, when the diffusion signal is changed, the change is required to be notified to a receiver 19. Therefore, a signal is received by an antenna 17 of the receiver 19, down conversion of the signal is performed by an RF part 18, demodulated to a base band, and control information is removed by a demultiplexer 15. When the control information is of change notification of the spreading signal, the change of the code is notified to a code control part 11, a code generating part 12 is controlled and the spreading code to be used for inverse spreading in an inverse spreading part 13 is changed by a receiver control part 14. The spreading signal is changed dynamically during communication. Thus, when interference level becomes higher during communication with the other party, the code is changed so that interferences are reduced.</p> |
