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:
Jan. 18, 2011
Filed:
Jun. 29, 2006
Xiaoyong Yu, Grayslake, IL (US);
Xiangyang Chen, Vernon Hills, IL (US);
Jian J. Wu, Reading, GB;
Motorola Mobility, Inc., Libertyville, IL (US);
Abstract
A base station receives () OFDMA messages from a plurality of end user platforms that share all used tones within at least one OFDMA symbol. By one approach this base station then uses () a fixed starting time to select contiguous samples from received aggregate multi-user signals wherein the fixed starting time is offset from a reference time that comprises a time at which the base station expects to be receiving the signals from all end users. In combination with the time offset approach noted above or in lieu thereof the base station can process () selected contiguous samples using fast Fourier transform and then provide () phase rotation with respect to those processed samples. When applying phase rotation, by one approach a phase rotation can be applied () to the aggregate multi-user signal and, in addition, individual phase rotation can be applied () as determined on a user-by-user basis.