Title:
TRANSMISSION POWER CONTROL SYSTEM
Document Type and Number:
Japanese Patent JP3155051
Kind Code:
B2
Abstract:
PURPOSE: To attain the stable control of transmission power by controlling an increase rate of transmission power at a succeeding time so that a reception C/N estimated from the increasing rate of transmission power is equal to an actually measured C/N thereby generating control information with a small scale circuit.
CONSTITUTION: An output of a transmission power control section 4 from a modulator 3 is sent to a satellite repeater 2 via an outdoor equipment 5, the equipment 5 receives its own station signal reflected in the repeater 2 and the signal is demodulated by a demodulator 6. A C/N conversion section 7 calculates the actually measured C/N from the demodulation output, and an arithmetic operation section 8 calculates information used for the control section 4 to control the transmission power at a succeeding time based on an increasing rate X of the transmission power at a current point of time at a fine weather and on the actually measured C/N. The arithmetic operation is implemented by including each of conditions such as rainfall attenuation quantities Lu, Ld, deterioration in reception C/N, a propagation time and a frequency of a radio wave for both up-link and down-link. Thus, control information is generated with a small scale circuit and stable control of transmission power is attained.
Inventors:
Takenaka, Tetsuyoshi
Tozawa, Yoshiharu
Mishiro, Tokihiro
Kazama, Hiroshi
Tozawa, Yoshiharu
Mishiro, Tokihiro
Kazama, Hiroshi
Application Number:
JP4580292A
Publication Date:
April 09, 2001
Filing Date:
March 03, 1992
Export Citation:
Assignee:
FUJITSU LTD
NIPPON TELEGR & TELEPH CORP <NTT>
NIPPON TELEGR & TELEPH CORP <NTT>
International Classes:
H04B1/04; H04B7/15; (IPC1-7): H04B7/15; H04B1/04
Attorney, Agent or Firm:
茂泉 修司