| 摘要 |
PROBLEM TO BE SOLVED: To eliminate disadvantages such as a wasteful time for finger detection with high accuracy at the time of receiving RAKE receiving, the incommunicable state of intra-cell entire mobile stations owing to radio wave interference of mobile stations, the reduction of path diversity effects due to time change of the number of paths, the restriction of frequency band introduction to a system because of system use band restriction due to a chip rate, the scale increase of an interference canceling device that is introduced for capacity increase and synchronous acquisition at a fast chip rate. SOLUTION: In a sending side, a sweep device 106 performs sweep in such a manner that the center frequency of a modulation signal is changed with time in accordance with a sweep pattern that is preliminarily defined by a frequency change controller 107 and after then sends it, and in a receiving end, a sweep device 111 correctly transmits a signal by detecting waves while sweeping the center frequency of a receiving signal with a sweep pattern which is produced from a frequency change controller 112 and is the same with the sending end. |
