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. 01, 2010
Filed:
Oct. 24, 2008
Joseph M. Lasker, New York, NY (US);
Andreas H. Hielscher, Brooklyn, NY (US);
James Masciotti, Yonkers, NY (US);
Christoph H. Schmitz, Brooklyn, NY (US);
Matthew Schoenecker, Berkeley, CA (US);
Joseph M. Lasker, New York, NY (US);
Andreas H. Hielscher, Brooklyn, NY (US);
James Masciotti, Yonkers, NY (US);
Christoph H. Schmitz, Brooklyn, NY (US);
Matthew Schoenecker, Berkeley, CA (US);
The Trustees of Columbia University in the City of New York, New York, NY (US);
The Research Foundation of State University of New York, Albany, NY (US);
Abstract
Systems and methods for digital detection of an analog tomographic signal are described. The methods include receiving an amplitude-modulated analog signal containing tomographic information, the analog signal having a modulation frequency, f; and converting the analog signal into a digital signal at a sampling frequency, f, to produce a number of samples, K. The digital signal is multiplied by an in-phase reference signal to obtain an in-phase signal component, the in-phase reference signal having the frequency, fλi; and the digital signal is multiplied by a quadrature reference signal to obtain a quadrature signal component, the quadrature reference signal having the frequency, f. The in-phase signal component and the quadrature signal component are passed through the K-point averaging filter. A signal amplitude is computed based on the filtered in-phase signal component and the filtered quadrature signal component, the signal amplitude being representative of the tomographic information.