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:
Dec. 31, 2002
Filed:
Dec. 16, 1999
Applicant:
Inventors:
Andrea Allasia, Lombardore, IT;
Guido Manzone, Turin, IT;
Assignee:
Telecom Italia Lab S.p.A., Turin, IT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04M 1/24 ; H04M 3/08 ; H04M 3/22 ;
U.S. Cl.
CPC ...
H04M 1/24 ; H04M 3/08 ; H04M 3/22 ;
Abstract
A test signal is injected on the line (L) and the corresponding return signal produced by the line itself as an effect of the echo is detected. A signal having lenticular envelope is used as test signal and is generated preferably starting from a first sinusoid with a first given frequency modulated in amplitude with a second sinusoid having a second given frequency, lower than the aforesaid first given frequency.