Telecommunications – Transmitter – With feedback of modulated output signal
Reexamination Certificate
1998-07-22
2001-03-06
Eisenzopf, Reinhard J. (Department: 2745)
Telecommunications
Transmitter
With feedback of modulated output signal
C455S127500, C455S102000
Reexamination Certificate
active
06198911
ABSTRACT:
TECHNICAL FIELD OF THE INVENTION
The present invention relates in general to telecommunications technology and more particularly to an apparatus and a method of controlling transmitter gain in a wireless telecommunications system.
BACKGROUND OF THE INVENTION
In order to meet transmitted power specifications, radio frequency gain should be accurate in a wireless telecommunications system. However, inaccuracies typically occur in the radio frequency gain of wireless telecommunications systems. These inaccuracies may occur as a result of effects such as shifts in tolerances, temperature variations, and device limitations, among others. Therefore, it is desirable to eliminate or reduce these effects on the accuracy of the radio frequency gain.
SUMMARY OF THE INVENTION
From the foregoing, a need has arisen for a method and an apparatus that controls the radio frequency gain in a wireless telecommunications system to compensate for inaccuracy causing effects.
An object of the invention is to provide an apparatus and a method of controlling transmitter gain in a wireless telecommunications system that substantially eliminate or reduce disadvantages and problems associated with conventional wireless telecommunications systems.
From the foregoing, it may be appreciated that a need has arisen for a method and device that controls the radio frequency gain in a wireless telecommunications system to compensate for inaccuracy causing effects. In accordance with the present invention, there is provided an apparatus and method of controlling transmitter gain in a wireless telecommunications system that substantially eliminates or reduces disadvantages and problems associated with conventional wireless telecommunications system.
According to an embodiment of the present invention, a method of controlling transmitter power in a wireless telecommunications system is provided that includes transmitting a composite transmit signal. The composite transmit signal carries information from inputs for a plurality of downlink communication signals. An output radio frequency power of the composite transmit signal is sampled and compared to the inputs for the plurality of downlink communication paths. A gain of the output radio frequency power is adjusted according to results of the comparison.
The present invention provides various technical advantages over conventional wireless telecommunications systems. For example, one technical advantage is to control a gain of an output radio frequency power for a composite transmit signal. Another technical advantage is to eliminate or reduce effects affecting the accuracy of the gain of the output radio frequency power. Yet another technical advantage is to maintain a constant gain for the output radio frequency power. Other technical advantages are readily apparent to one skilled in the art from the following figures, description, and claims.
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Lea Raymond G.
Lysejko Martin
Airspan Networks Inc.
Baker & Botts L.L.P.
Bhattacharya Sam
Eisenzopf Reinhard J.
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