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:
Sep. 23, 2014
Filed:
Sep. 30, 2013
Agilent Technologies, Inc., Loveland, CO (US);
Valentin Abramzon, Mountain View, CA (US);
Agilent Technologies, Inc., Santa Clara, CA (US);
Abstract
A predistortion generator includes a sample input, a summing circuit to output predistorted samples to a DAC, and distortion term processors, each including a product generator and a FIR filter in tandem. The distortion term processors include a second-order and/or a third-order distortion term processor. In the second-order distortion term processor, the product generator generates a product of only two samples corresponding to a current sample as a respective second-order distortion term that is filtered by the FIR filter thereof using a respective FIR filter characteristic. In the third-order distortion term processor, the product generator generates a product of only three samples corresponding to the current sample as a respective third-order distortion term that is filtered by the FIR filter thereof using a respective FIR filter characteristic. The FIR filter characteristics of FIR filters are configured to reduce distortion in a designated Nyquist zone.