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:
Nov. 26, 2019
Filed:
Nov. 16, 2016
Topcon Positioning Systems, Inc., Livermore, CA (US);
Andrey Vladimirovich Veitsel, Moscow, RU;
Leonid Victorovich Purto, Moscow, RU;
Alexey Stanislavovich Lebedinsky, Moscow, RU;
Dmitry Anatolievich Rubtsov, Moscow, RU;
Topcon Positioning Systems, Inc., Livermore, CA (US);
Abstract
A method for demodulating and tracking of CSK-modulated signals comprising the steps of receiving a CSK-modulated signal at a plurality of correlators, the CSK-modulated signal including a transmitted symbol; convolving the CSK-modulated signal with a preset reference replica of the CSK-modulated signal for N shifts (D. . . D) of a PRN code relative to an internal receiver clock corresponding to N possible code shifts in the transmitted symbol, and M other code shifts (T. . . T), where M<N, that satisfies D−ΔT≤T≤D+ΔT for all Tfrom (T. . . T); selecting one of the N shifts (D) where the convolution is a maximum; adjusting a CSK-signal Delay Locked Loop (DLL) based on a ratio of convolution values for the shifts Dand Tfor all Tfor which a modulus |D−T| is smaller than a predefined threshold; and determining a value of the transmitted symbol based on D.