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. 04, 2023
Filed:
Feb. 02, 2021
Chongqing University of Posts and Telecommunications, Chongqing, CN;
Guojun Li, Chongqing, CN;
Jinghui Li, Chongqing, CN;
Changrong Ye, Chongqing, CN;
Huan Ma, Chongqing, CN;
Guangfa Zheng, Chongqing, CN;
Yiping Luo, Chongqing, CN;
Zunli Wang, Chongqing, CN;
CHONGQING UNIVERSITY OF POSTS AND TELECOMMUNICATIONS, Chongqing, CN;
Abstract
The present invention relates to the field of digital signal processing, and in particular to a Costas sequence time-frequency joint synchronization method based on all-phase spectrum correction. The method improves the defects existing in a discrete frequency spectrum correction algorithm using short-time Fourier transform and sliding correlation. The improvement mainly comprises: the present disclosure provides a solution based on iterative optimization: when an actual frequency offset is an integral multiple of the spectral resolution, a large error can occur, frequency offset correction and time delay correction are carried out on a signal by using an estimated value having a large estimated error, then estimation is carried out again, and the frequency offset of the signal is not a special value by means of an iteration mode.