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. 11, 2024
Filed:
Jan. 10, 2024
Transport Planning and Research Institute Ministry of Transport, Beijing, CN;
Zhongli Yi, Beijing, CN;
Shanshan Wang, Beijing, CN;
Weichang Wang, Beijing, CN;
Shengli Liu, Beijing, CN;
Fuzhai Wang, Beijing, CN;
Xinrui Zheng, Beijing, CN;
Xuege Yang, Beijing, CN;
Abstract
A method for processing an automatic identification system (AIS) baseband signal based on a field-programmable gate array (FPGA) is provided. A signal output by a bus is cached in a message buffer and then sent to a Gaussian filtered minimum shift keying (GMSK) modulator after being encoded by a frame encoder. Another signal output by the bus is processed by an AIS access control module and then also sent to the GMSK modulator. The two signals output by the bus are respectively output to two digital to analog converters (DACs) after being modulated by the GMSK modulator; a digital signal is converted into an analog signal, and the analog signal is sent to an I/Q or two-point modulation radio frequency (RF) circuit. Two received baseband signals are respectively input into analog to digital converters (ADCs) and separately sent to the bus.