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:
Sep. 01, 2015
Filed:
Aug. 28, 2012
Applicants:
Shiquan Wu, Nepean, CA;
Jung Yee, Ottawa, CA;
Inventors:
Shiquan Wu, Nepean, CA;
Jung Yee, Ottawa, CA;
Assignee:
Wi-LAN, Inc., Ottawa, CA;
Primary Examiner:
Int. Cl.
CPC ...
H04J 11/00 (2006.01); H04J 7/00 (2006.01); H04L 27/26 (2006.01);
U.S. Cl.
CPC ...
H04L 27/2626 (2013.01); H04L 27/2647 (2013.01);
Abstract
Whitespace devices can use unused television frequencies for transmission and reception of WiFi OFDM signals. Three contiguous bands, such as former channels 2, 3, and 4, may be bonded together to define a whitespace band. In order to fit a WiFi OFDM signal into this whitespace band, a whitespace device compresses the bandwidth of each WiFi OFDM signal using a specific spectrum mask. Very low transmission power is needed for the modified WiFi OFDM signals, eliminating the need for high power amplifiers and most of the WiFi OFDM designs such as PHY and MAC can be reused with minor modifications.