公开(公告)号：JPH10163945A

公开(公告)日：1998-06-19

申请号：JP18624197

申请日：1997-07-11

Applicant: KOREA ELECTRONICS TELECOMM ,  KOREA TELECOMMUN

Inventor： CHO SHINKO ,  SON EN ,  GO TOKUKICHI

IPC: H04B17/00 ,  H04B1/04 ,  H04B7/155 ,  H04B17/18 ,  H04B17/318

Abstract: PROBLEM TO BE SOLVED: To provide a up-link power control method for satellite broadcast transmission station for compensating the nonlinear characteristics of a high output amplifier used for transmission and amplifying the high frequency signal of a transmission object to an appropriate level. SOLUTION: An attenuator 42 for adjusting the level of transmission signals, a power controller 41 for controlling the attenuation of the attenuator corresponding to the reception level of beacon signals from a satellite, a converter 50 for converting the transmission signals whose level is adjusted in the attenuator 42 to the high frequency signals and the high output amplifier 60 for amplifying the converted high frequency signals and transmitting them to the satellite are provided. The power controller 41 controls the attenuation amount of the attenuator 42 so as to linearly increase the level of the high frequency signals transmitted to the satellite for the increase of the attenuation of the received beacon signals based on characteristics for compensating the nonlinear characteristics of the high output amplifier 60.