| 摘要 |
PROBLEM TO BE SOLVED: To provide a spread spectrum communication system capable of easily improving communication quality. SOLUTION: A reception station 20 is provided with a magnetostatic wave filter 24 for suppressing narrow band interference waves equal to or above a fixed level on a frequency axis included in reception signals, a communication quality checking means 29 for checking the communication quality of inversely spread and demodulated signals and a transmission means such as an instruction generator 30 for transmitting an instruction for changing transmission output to a transmission station 40 corresponding to the change of the communication quality. The transmission station 40 is provided with an instruction detector 48 for changing the transmission-output of the signals corresponding to the instruction from the reception station 20 and an amplification factor variable amplifier 53. Thus, the degradation of the communication quality due to the increase of the narrow band interference waves within the frequency band of spread spectrum signals is prevented. Also, the cost of the reception station is lowered. |
