Channelized feed-forward system
AssigneeThe United States of America as represented by the Secretary of the Navy
InventorRonald M. Bauman
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Abstract
A feed-forward system for reducing the distortion products from a device such as an amplifier, wherein samples of the distortion products from the output of the device in one or more frequency bands whose bandwidths are less than that of the device are extracted, adjusted in amplitude and phase and subtractively combined with the device output to produce a system output in which distortion in the frequency bands is reduced.
Claims23
A feed-forward system for reducing the distortion generated by a device such as an amplifier, the feed-forward system comprising:
- a feed-forward channel including,
- sampling means adapted to be connected to the device for extracting a sample of the distortion products from the output of the device in a frequency band whose bandwidth is less than that of the device;
- and
- equalizing means connected to the sampling means for equalizing the sample and the products remaining in the output of the device in the frequency band after extracting the sample;
- and
- combining means connected to the equalizing means and adapted to be connected to the device for subtractively combining the equalized sample and the remaining products to produce a system output in which distortion in the frequency band is reduced.
A method of reducing the distortion generated by a device such as an amplifier comprising the steps of:
- extracting a sample of the distortion products from the output of the device in at least one frequency band whose bandwidth is less than that of the device;
- equalizing the sample and the products remaining in the output of the device in the frequency band after extracting the sample;
- and
- subtractively combining the equalized sample and the remaining products to produce a system output in which distortion in the frequency band is reduced.
Dependencies are inferred from the claim text.