Device and method for automatically controlling transmission pow

Details Device and method for automatically controlling transmission pow Device and method for automatically controlling transmission pow

1996-12-30

1999-10-26

Tse, Young T.

Pulse or digital communications

Transmitters

Antinoise or distortion

375307, 455126, 455127, 455522, H04B 104

Patent

active

059740930

ABSTRACT:
A device and method for automatically controlling transmission power of a CDMA site, by automatically controlling high frequency power of the CDMA site. The circuit for automatically controlling transmission power of a site in a CDMA mobile communication system, including: at least, one digital processing unit for encoding data on a transmission channel; a transmitter for converting, filtering and amplifying a signal output from the digital processor; a power amplifier for amplifying transmission data to propagate the amplified data in the air; a variable attenuator interposed between the transmitter and the power amplifier, for varying data output from the transmitter to be transmitted to the power amplifier; a power measurer for measuring the transmission power from the power amplifier; a detector for comparing a calculated value of the transmission power with a measurement value of the transmission power to obtain an error power therefrom; a power controller for comparing an absolute value of the error power with a predetermined permissible variation, to control the variable attenuator in association with the comparison result; and a coupler for coupling the power amplifier to the power measurer.

REFERENCES:
patent: 5199045 (1993-03-01), Kato
patent: 5323329 (1994-06-01), Keane
patent: 5659892 (1997-08-01), Soleimani et al.
patent: 5715526 (1998-02-01), Weaver, Jr. et al.

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