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:
Oct. 03, 2023
Filed:
Mar. 18, 2021
Nec Corporation, Tokyo, JP;
Yoshiaki Doi, Tokyo, JP;
NEC CORPORATION, Tokyo, JP;
Abstract
A DPD () includes: a polynomial structure including a pseudo-interpolation/sub-sample-shift processing unit () configured to operate at a sampling rate for sampling an input signal not upsampled in a previous stage of the DPD (), pseudo-interpolate a sample point between sample points of the input signal, and shift the pseudo-interpolated sample point by a sub-sample and a multiplexer () configured to select a combination of a sub-sample shift amount; and an FIR filter () configured to be provided in a subsequent stage of the polynomial structure and include a sub-sample delay filter delaying a sample point of the input signal by a sub-sample. The DPD () compensates for distortion due to a sample point of the input signal and compensates for distortion due to a sub-sample point between sample points of the input signal for the DPD (), by using the polynomial structure and the FIR filter ().