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:
Sep. 01, 2020
Filed:
Sep. 04, 2019
Telink Semiconductor (Shanghai) Co., Ltd., Shanghai, CN;
Hong Nie, Shanghai, CN;
TELINK SEMICONDUCTOR (SHANGHAI) CO., LTD., Shanghai, CN;
Abstract
The present invention relates to communication technologies and provides a method and a device for FSK/GFSK demodulation, the method comprises: determining a digital information vector group {V(i)} of a codeword a[k] to be demodulated and a corresponding phase matching vector group {θ(i)} within the duration of (2M+1)T; determining a received phase vector {tilde over (φ)}(i) of a received FSK/GFSK baseband signal φ(t,a); determining an average phase difference βbetween {tilde over (φ)}(i) and θ(i); calculating the phase matching degree Qbetween {tilde over (φ)}(i) and θ(i) after removing the impact of the average phase difference β, and determining an l value corresponding to the phase matching degree Qbeing the maximum; and determining the a[k], corresponding to the l value, in the digital information vector V(i) as a demodulation result. Because the impact of the average phase difference is removed during phase matching, the accuracy of phase matching is increased, and the performance of the phase domain demodulation technology is improved.