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US 2002/0160715 A1Published application
Post-amplification linearization
OwnerMichael S. Davis, Alan R. Cherretteinventors
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Abstract
A post-amplification linearization technique for processing a signal distorted by a nonlinear amplifier. The post-amplification linearization technique is implemented using a linearizer and linearization method and involves processing the distorted signal using nonlinear processing to reduce intermodulation distortion. The nonlinear processing reduces the intermodulation distortion by applying an integral transformation to the nonlinear amplifier characteristic.
Claims9
Apparatus comprising:
- a transmitter for amplifying a baseband signal using a nonlinear amplifier to produce a signal having intermodulation distortion and for transmitting the signal over a free space link;
- a receiver for receiving the transmitted signal having intermodulation distortion and for processing it using a predetermined nonlinear transfer characteristic to produce an estimate the baseband signal that has reduced intermodulation distortion.
A post-amplification linearization method comprising the steps of:
- amplifying a baseband signal to produce a signal having intermodulation distortion;
- transmitting the signal having intermodulation distortion over a free space link;
- receiving the transmitted signal;
- processing the received signal using a predetermined nonlinear transfer characteristic to produce an estimate the baseband signal that has reduced intermodulation distortion.
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Dependencies are inferred from the claim text.