Predistortion circuit for a transmit system
First Claim
1. A system for processing an input signal, the system comprising:
- a predistortion subsystem for receiving said input signal and for producing a predistorted signal by applying a deliberate predistortion to said input signal; and
a signal processing subsystem receiving and processing said predistorted signal and producing a system output signal, wherein said predistortion subsystem distorts said input signal to compensate for distortions in said system output signal;
said signal processing subsystem decomposes said predistorted signal into separate components, each of said separate components being processed separately; and
said processing subsystem combines said components after processing to produce said system output signal.
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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 predistortion subsystem receives an input signal and applies a predistortion modification to the input signal. The predistortion modification may be a phase modification, a magnitude modification, or a combination of both. The predistorted signal is then received by an amplifier subsystem. The amplifier subsystem decomposes the predistorted signal into separate components, each having a constant envelope phase modulation, and separately amplifies each component. 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 input to compensate for distortions introduced in the signal by the amplifier subsystem.
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Citations
19 Claims
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1. A system for processing an input signal, the system comprising:
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a predistortion subsystem for receiving said input signal and for producing a predistorted signal by applying a deliberate predistortion to said input signal; and
a signal processing subsystem receiving and processing said predistorted signal and producing a system output signal, wherein said predistortion subsystem distorts said input signal to compensate for distortions in said system output signal;
said signal processing subsystem decomposes said predistorted signal into separate components, each of said separate components being processed separately; and
said processing subsystem combines said components after processing to produce said system output signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 19)
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12. A method of processing an input signal to produce a system output signal, the method comprising:
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a) receiving said input signal b) applying a deliberate predistortion to said input signal to result in a predistorted signal c) decomposing said predistorted signal into at least two component signals d) combining said at least two component signals to produce said system output signal. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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Specification