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:
Jun. 17, 2025
Filed:
Jan. 16, 2025
National University of Defense Technology, Changsha, CN;
Wei Xiao, Changsha, CN;
Wenxiang Liu, Changsha, CN;
Feixue Wang, Changsha, CN;
Xiaozhou Ye, Changsha, CN;
Pengcheng Ma, Changsha, CN;
Zukun Lu, Changsha, CN;
Zongnan Li, Changsha, CN;
Guangfu Sun, Changsha, CN;
Xiaomei Tang, Changsha, CN;
Muzi Yuan, Changsha, CN;
Honglei Lin, Changsha, CN;
Sixin Wang, Changsha, CN;
NATIONAL UNIVERSITY OF DEFENSE TECHNOLOGY, Changsha, CN;
Abstract
A design method for a satellite navigation signal system with mixed modulation of direct spread spectrum and frequency hopping includes: modulating the spread spectrum code sequence of multipath signal components; mixing and multiplexing with the signal components corresponding to the same frequency point; forming a baseband code sequence; separating signal components corresponding to the baseband code sequence to obtain separated radio frequency signals; recombining and modulating separated radio frequency signals; controlling the frequency hopping pattern by the frequency hopping code sequence if the separated radio frequency signals are authorized signals, and performing mixed frequency synthesis modulation; performing direct combined radio frequency modulation if the separated radio frequency signals are unauthorized signals, and obtaining the recombined signal component; amplifying the signal power to obtain the direct spread spectrum navigation signal.