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US 7,103,029 B1Granted
Transmitter gain stabilizing apparatus
AssigneeFujitsu Limited
InventorRyoichi Minowa
Life of this patent
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Abstract
Disclosed is a transmitter gain stabilization apparatus which uses feedback control to stably control the gain of a radio base-station transmitter in a CDMA mobile communication system. The apparatus includes a reference-power generating unit for generating average power of a baseband signal as reference power, a detector for detecting transmission power, and a gain adjustment unit for adjusting the gain of a radio unit in the base station in such a manner that the detected power will coincide with the reference power.
Claims8
An apparatus for stabilizing gain of a CDMA transmitter in a base station, comprising:
- first averaging means for outputting an average power value of a transmission baseband signal;
- a radio unit, to which the transmission baseband signal is input, for applying modulation, frequency conversion and high-frequency amplification to the baseband signal;
- a transmission power detector for detecting power of a transmission signal output from the radio unit;
- second averaging means for outputting an average value of the detected transmission power;
- and
- a first gain adjustment unit for comparing the average power of the baseband signal and the detected transmission power that have been output from the first and second averaging means, respectively, and adjusting the gain of the radio unit based upon the result of the comparison.
3 more elements
Dependencies are inferred from the claim text.