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:
Jul. 23, 2019
Filed:
Jan. 15, 2018
Applicant:
Futurewei Technologies, Inc., Plano, TX (US);
Inventors:
Xiaolong Zhang, Wuhan, CN;
Fan Wang, Wuhan, CN;
Tao Ouyang, Wuhan, CN;
Li Zhang, Wuhan, CN;
James Jeng Chen, Corona, CA (US);
Assignee:
Futurewei Technologies, Inc., Plano, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04B 3/20 (2006.01); H04B 3/493 (2015.01);
U.S. Cl.
CPC ...
H04B 3/20 (2013.01); H04B 3/493 (2015.01);
Abstract
Disclosed herein is a multi-stage echo cancellation scheme. The disclosed embodiments include an apparatus and method for monitoring and canceling echoes greater than 25 dB in a coaxial cable plant. The method includes obtaining echo channel estimate coefficients from a cable node. The method determines a location and strength of each partial echo in an impulse response using the echo channel estimate coefficients. Optionally, the method determines a frequency response of each partial echo in the impulse response.