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:
Oct. 11, 2011
Filed:
Mar. 13, 2008
Narayan Prasad, Plainsboro, NJ (US);
Xiaodong Wang, New York, NY (US);
Mohammad Madihian, Plainsboro, NJ (US);
Narayan Prasad, Plainsboro, NJ (US);
Xiaodong Wang, New York, NY (US);
Mohammad Madihian, Plainsboro, NJ (US);
NEC Laboratories America, Inc., Princeton, NJ (US);
Abstract
A method for filtering in a wireless downlink channel, where all dominant transmitting sources use inner codes from a particular set, includes the steps of estimating a channel matrix seen from a desired transmitter source in response to a pilot or preamble signal; converting the estimated channel matrix into an effective channel matrix responsive to the inner code of the desired transmitting source; estimating a covariance matrix of noise plus interference in a linear model whose output is an equivalent of the received observations and in which the effective channel matrix corresponding to each dominant transmitting source inherits the structure of its inner code; computing a signal-to-noise-interference-ratio SINR responsive to the covariance matrix and the effective channel matrix corresponding to the desired source; and feeding back the computed SINR to the transmitter source.