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. 16, 2019
Filed:
Mar. 24, 2015
Applicant:
Park Air Systems Limited, Peterborough, GB;
Inventors:
Desmond Keith Phillips, Impington, GB;
Paul Andrew Noble, Peterborough, GB;
Assignee:
Park Air Systems Limited, Peterborough, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04W 4/00 (2018.01); H04J 11/00 (2006.01); H04L 27/06 (2006.01); H04L 27/26 (2006.01);
U.S. Cl.
CPC ...
H04J 11/0036 (2013.01); H04L 27/06 (2013.01); H04L 27/265 (2013.01);
Abstract
A method of determining the presence of a secondary carrier signal in a time-domain sum-signal including a primary carrier signal is disclosed, the method comprising: transforming the sum-signal into the frequency domain; extracting at least one peak corresponding to a heterodyne tone from the transformed sum-signal; determining the presence of a secondary carrier signal in the sum-signal based on said at least one peak. A corresponding apparatus is also disclosed.