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. 19, 2011
Filed:
Mar. 30, 2007
Amer A. Hassan, Kirkland, WA (US);
Christian Huitema, Clyde Hill, WA (US);
Wayne Stark, Redmond, WA (US);
Yunnan Wu, Redmond, WA (US);
Philip Andrew Chou, Bellevue, WA (US);
Amer A. Hassan, Kirkland, WA (US);
Christian Huitema, Clyde Hill, WA (US);
Wayne Stark, Redmond, WA (US);
Yunnan Wu, Redmond, WA (US);
Philip Andrew Chou, Bellevue, WA (US);
Microsoft Corporation, Redmond, WA (US);
Abstract
A multiuser scheme allowing for a number of users, sets of user, or carriers to share one or more channels is provided. In the invention, the available channel bandwidth is subdivided into a number of equal-bandwidth subchannels according to standard OFDM practice. A transmitter transmits data on a set of OFDM subchannels that need not be contiguous in the spectrum or belong to the same OFDM channel. A receiver receives and decodes the data and detects errors on subchannels. The receiver then broadcasts the identity of those subchannels on which the error rate exceeds a specific threshold, and the transmitter may select different subchannels for transmission based on this information.