DEVICE AND METHOD FOR MULTIPLEXING SIGNAL

摘要

Modulated signals inputted through terminals 111-11n are converted in frequency into signals of mutually different frequency bands by means of frequency converting means 121-12n. The converted signals are supplied to a power combining means (16) respectively through variable attenuators 211-21n, multiplexed and outputted. Part of the multiplexed output is extracted and a level detecting means (23) detects the envelope power level. A control means (24) inputs the level L detected by the detecting means (23). When the level L exceeds the level Ls which is k-times (k is about 4 or 5) higher than the average power of the multiplexed signals, the control means (24) attenuates the average power of the modulated signals by a fctor of k/n during the period of about 1/ DELTA F0 (sec.) (where DELTA F0 is the band-width frequency of the multiplexed signals) by means of the attenuators 211-21n.