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US Patent 9673848 Wide bandwidth digital predistortion system with reduced sampling rate

Patent 9673848 was granted and assigned to Dali Systems Co. Ltd. on June, 2017 by the United States Patent and Trademark Office.

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Patent abstract

A digital predistortion linearization method is provided for increasing the instantaneous or operational bandwidth for RF power amplifiers employed in wideband communication systems. Embodiments of the present invention provide a method of increasing DPD linearization bandwidth using a feedback filter integrated into existing digital platforms for multi-channel wideband wireless transmitters. An embodiment of the present invention utilizes a DPD feedback signal in conjunction with a low power band-pass filter in the DPD feedback path.

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