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:
Jan. 27, 2015
Filed:
Jan. 18, 2012
Sanam Moghaddamnia, Hannover, DE;
Feng Zheng, Duisburg, DE;
Imed Ben Brahim, Hannover, DE;
Wojciech Emmerich, Celle, DE;
Christian Hansen, Sehnde, DE;
Jens-uwe Bruns, Burgdorf, DE;
Sanam Moghaddamnia, Hannover, DE;
Feng Zheng, Duisburg, DE;
Imed Ben Brahim, Hannover, DE;
Wojciech Emmerich, Celle, DE;
Christian Hansen, Sehnde, DE;
Jens-Uwe Bruns, Burgdorf, DE;
Baker Hughes Incorporated, Houston, TX (US);
Abstract
A method for reducing interference in a received downhole telemetry signal includes: segmenting a received signal; windowing each signal segment; transforming each windowed signal segment into a complex variable domain to generate a plurality of complex variable domain segments with an in-phase component vector I and a quadrature component vector Q; calculating a real amplitude vector A from the I and the Q vectors; filtering interferers in the amplitude vector A for each complex variable domain segment to generate a filtered amplitude vector Ã; recalculating an amplitude of the amplitude vector A using the filtered amplitude vector à to generate an output amplitude vector Â; scaling the I and the Q vectors by a factor Â/A to generate an output in-phase component vector I' and an output quadrature component vector Q′; and transforming I′ and Q′ into the time domain to provide an interference-reduced output signal in the time domain.