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:
Dec. 08, 2020
Filed:
Aug. 30, 2019
Applicant:
Nanosemi, Inc., Waltham, MA (US);
Inventors:
Helen H. Kim, Sudbury, MA (US);
Alexandre Megretski, Concord, MA (US);
Yan Li, Lexington, MA (US);
Kevin Chuang, Cambridge, MA (US);
Zohaib Mahmood, Westwood, MA (US);
Assignee:
NanoSemi, Inc., Waltham, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04B 1/04 (2006.01); H04L 12/24 (2006.01); H03F 1/32 (2006.01);
U.S. Cl.
CPC ...
H04B 1/0475 (2013.01); H03F 1/3241 (2013.01); H03F 1/3252 (2013.01); H03F 1/3258 (2013.01); H04L 41/0654 (2013.01); H04B 2001/0425 (2013.01);
Abstract
An approach to digital compensation uses a particular structure for a digital pre-distorter (DPD) which acts as a relatively accurate pre-inverse of a non-linear circuit (e.g., a non-linear transmit chain involving digital-to-analog converter (DAC), lowpass filter, modulator, bandpass filter, and power amplifier) while making use of a relatively small number of parameters that characterize the non-linearity and/or parameters that provide accurate linearization without requiring continual updating.