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. 10, 2015
Filed:
Jun. 15, 2012
Jean Seydoux, Rio de Janeiro, BR;
Libo Yang, Sugar Land, TX (US);
Mark Kuchenbecker, Rosenberg, TX (US);
Reza Taherian, Sugar Land, TX (US);
Emmanuel Legendre, Sevres, FR;
Jian Yang, Sugar Land, TX (US);
Mark A. Fredette, Houston, TX (US);
Jean Seydoux, Rio de Janeiro, BR;
Libo Yang, Sugar Land, TX (US);
Mark Kuchenbecker, Rosenberg, TX (US);
Reza Taherian, Sugar Land, TX (US);
Emmanuel Legendre, Sevres, FR;
Jian Yang, Sugar Land, TX (US);
Mark A. Fredette, Houston, TX (US);
Schlumberger Technology Corporation, Sugar Land, TX (US);
Abstract
The present disclosure relates to a method to determine the phase of a signal when transmitter and receiver circuits use separate clocks. A discrepancy between the separate clocks is determined, as is a correction factor between the separate clocks. The phase is determined using a measured time of arrival of the signal, the determined discrepancy, and the determined correction factor. A drift factor and an expected start time of a pulse sequence may be used to determine the discrepancy. A start time of a pulse within the pulse sequence is determined and used to determine the correction factor. The method works by either absolute synchronization of the separate clocks, or by making the measurements independent of clock synchronization.