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:
Jul. 14, 2009
Filed:
May. 11, 2005
Yoo-seung Song, Suwon-si, KR;
Jae-hyok Lee, Seoul, KR;
Seung-hwan Lee, Seoul, KR;
Ki-hwan Hwang, Suwon-si, KR;
Jae-ho Jeon, Seongnam-si, KR;
Seung-joo Maeng, Seongnam-si, KR;
Yoo-Seung Song, Suwon-si, KR;
Jae-Hyok Lee, Seoul, KR;
Seung-Hwan Lee, Seoul, KR;
Ki-Hwan Hwang, Suwon-si, KR;
Jae-Ho Jeon, Seongnam-si, KR;
Seung-Joo Maeng, Seongnam-si, KR;
Samsung Electronics Co., Ltd., Suwon-si, KR;
Abstract
A digital predistortion apparatus is provided for predistorting a nonlinear characteristic caused by a wideband power amplifier that amplifies a input signal. The digital predistortion apparatus includes a predistorter, connected to the power amplifier via a digital-to-analog converter (DAC) and a frequency up-converter, for receiving the input signal and compensating for the nonlinear characteristic using a look-up table that depends upon a change in output power of the power amplifier. The digital predistortion apparatus further includes look-up table (LUT) updating block for adaptively updating the look-up table by comparing a feedback signal output from the power amplifier, connected thereto via an analog-to-digital converter (ADC), with the input signal output from the predistorter.