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. 15, 2008
Filed:
Sep. 10, 2004
Andreas F. Molisch, Arlington, MA (US);
Jianxuan Du, Atlanta, GA (US);
YE LI, Marietta, GA (US);
Daqing Gu, Burlington, MA (US);
Jinyun Zhang, Cambridge, MA (US);
Andreas F. Molisch, Arlington, MA (US);
Jianxuan Du, Atlanta, GA (US);
Ye Li, Marietta, GA (US);
Daqing Gu, Burlington, MA (US);
Jinyun Zhang, Cambridge, MA (US);
Mitsubishi Electric Research Laboratories, Inc, Cambridge, MA (US);
Abstract
A method minimizes a rate for feeding back channel state information from a receiver to a transmitter in a multi-input, multi-output communications systems. A temporal autocorrelation function of the channel between the transmitter and the receiver is determined. A spatial covariance information is estimated of the channel. Then, the minimum rate for feeding back channel state information from the receiver to the transmitter is based on actual channel state information and the estimated spatial covariance information and the temporal autocorrelation function.