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:
Apr. 11, 2017
Filed:
Apr. 05, 2013
Applicant:
Mitsubishi Electric Corporation, Tokyo, JP;
Inventors:
Assignee:
Mitsubishi Electric Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01P 3/36 (2006.01); G01P 5/26 (2006.01); G01S 17/95 (2006.01); G01S 17/10 (2006.01); G01S 17/58 (2006.01); G01S 7/483 (2006.01); G01S 7/481 (2006.01);
U.S. Cl.
CPC ...
G01P 5/26 (2013.01); G01S 7/483 (2013.01); G01S 7/4813 (2013.01); G01S 17/107 (2013.01); G01S 17/58 (2013.01); G01S 17/95 (2013.01);
Abstract
There is provided a coherence length measurement device () that calculates a coherence length Lbased on a spectrum v calculated by an FFT device () and performs, in case where the coherence length Lis shorter than an FFT gate width G, a setting change to shorten the FFT gate width Gand a pulse width P, and the FFT device () performs frequency analysis on a received signal outputted from an A/D converter () by a unit of an FFT gate following the setting change to calculate the spectrum v of the received signal.