Back to results
US 6,333,676 B1Granted
Control method and control arrangement
AssigneeNokia Networks Oy
InventorToni Neffling
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeNokia Networks Oy
InventorToni Neffling
Estimating the term…
The invention relates to a control method and a control arrangement which comprises a feedforward power amplifier (10), which receives and amplifies a signal and which on amplifying the signal causes non-linearities to the signal. The control arrangement also comprises adjusting members (50, 80) and adaptation means (110, 130), which form an adaptation factor and control the operation of the adjusting means (50, 80) by means of the adaptation factor by adapting the amplitudes and phases of signal propagating along different signal paths to one another. The control arrangement further comprises control means (120), which produce information of the gain required by the power amplifier (10), said control means (120) ordering the adaptation means (110, 130) to adjust the adaptation factor in advance on the basis of the received information to correspond to the gain of the power amplifier (10), which enables adaptation of the signal also when the input power level changes rapidly.
A control method used in a feedforward power amplifier, which receives a signal and which on amplifying the signal causes non-linearities to the signal, the method comprising forming an adaptation factor by means of which the amplitudes and phases of signals propagating along different signal paths are adapted to one another, wherein information is produced on the gain required by the amplifier, and on the basis of the information the adaptation factor to be used is changed to correspond to the gain of the amplifier in advance, which enables adaptation of the signal when the input power level changes rapidly.
A control arrangement which comprises a feedforward power amplifier, which receives and amplifies a signal and which on amplifying the signal causes non-linearities to the signal, and first and second adjusting members and first and second adaptation means, which form an adaptation factor and control the operation of the first and second adjusting members by means of the adaptation factor by adapting the amplitudes and phases of signals propagating along different signal paths to one another, wherein the control arrangement comprises control means, which produce information on the gain required by the power amplifier, said control means ordering the first and second adaptation means to adjust the adaptation factor in advance on the basis of the received information to correspond to the gain of the power amplifier, which enables adaptation of the signal also when the input power level changes rapidly.
Dependencies are inferred from the claim text.