The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 10, 2016
Filed:
May. 21, 2014
Altera Corporation, San Jose, CA (US);
Volker Mauer, Princes Risborough, GB;
Nima Safari, High Wycombe, GB;
Shahin Gheitanchi, Maidenhead, GB;
Richard Maiden, Menlo Park, CA (US);
Altera Corporation, San Jose, CA (US);
Abstract
Integrated circuits are provided with wireless communications circuitry having digital predistortion (DPD) circuitry, peak canceling circuitry, a power amplifier, and signal conditioning circuitry for controlling the DPD and peak canceling circuitry. The peak canceling circuitry may receive transmit signals and may clip peaks in the transmit signals that exceed a magnitude threshold value. The DPD circuitry may compensate for non-linear characteristics of the power amplifier by outputting a predistorted version of the clipped transmit signals. The power amplifier may receive the predistorted signals and may perform amplification to generate amplified signals. The signal conditioning circuitry may identify power transfer characteristics of the power amplifier and DPD circuitry using the predistorted signals and the amplified signals. The signal conditioning circuitry may update the magnitude threshold value imposed by the peak canceling threshold based on the identified power transfer characteristics to mitigate out-of-band spectral regrowth in the predistorted signals.