PREDISTORTION CIRCUIT FOR A TRANSMIT SYSTEM
3 Assignments
0 Petitions
Accused Products
Abstract
Systems and methods related to amplifier systems which use a predistortion subsystem to compensate for expected distortions in the system output signal. A signal processing subsystem receives an input signal and decomposes the input signal into multiple components. Each signal component is received by a predistortion subsystem which applies a predistortion modification to the component. The predistortion modification may be a phase modification, a magnitude modification, or a combination of both and is applied by adjusting the phase of the fragment. The predistorted component is then separately processed by the signal processing subsystem. The processing may take the form of phase modulation and amplification. The phase modulated and amplified components are then recombined to arrive at an amplitude and phase modulated and amplified output signal. The predistortion modification is applied to the components to compensate for distortions introduced in the signal by the signal processing subsystem.
70 Citations
40 Claims
-
1-30. -30. (canceled)
-
32-37. -37. (canceled)
-
38. A system for processing an input signal, the system comprising:
-
means for processing the input signal and producing a system output signal; and means for producing at least two predistorted signals by applying a deliberate predistortion to at least two internal input signals; where the means for producing is configured to distort the internal input signals to compensate for distortions in the system output signal; where the means for producing is configured to decompose the input signal into separate components to produce the at least two internal input signals; and where the means for processing is configured to combine the predistorted signals after processing the input signal to produce to system output signal.
-
-
39. A method comprising:
-
decomposing an input signal into at least two component signals; applying a deliberate predistortion to each of the at least two component signals to produce predistorted signals; and combining the predistorted signals to produce an output signal.
-
-
40. A system for processing an input signal, comprising:
-
a decomposition subsystem to produce at least two predistorted signals responsive to the input signal; and a signal processing subsystem to generate an output signal by processing the at least two predistorted signals, the at least two predistorted signals being configured to compensate for system distortion.
-
Specification