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:
Feb. 07, 2012
Filed:
Apr. 28, 2008
Alexander M. Haimovich, North Brunswick, NJ (US);
Osvaldo Simeone, Hoboken, NJ (US);
BO Niu, Kearny, NJ (US);
Oren S. Somekh, Princeton, NJ (US);
Alexander M. Haimovich, North Brunswick, NJ (US);
Osvaldo Simeone, Hoboken, NJ (US);
Bo Niu, Kearny, NJ (US);
Oren S. Somekh, Princeton, NJ (US);
New Jersey Institute of Technology, Newark, NJ (US);
Abstract
A single-input single-output (SISO) downlink channel with K users is analyzed in the presence of Rayleigh flat fading. A limited channel state information (CSI) feedback scheme is included, where only an outdated 1-bit feedback per user is available at the base station for each fading block. A closed-form expression for the achievable ergodic sum-rate of the 1-bit feedback scheme is presented for any number of users, as a function of the fading temporal correlation coefficient, the threshold of the 1-bit CSI quantizer and the SNR. The sum-rate scales with increasing number of users as log log K, which is the same scaling law achieved by the optimal non-delayed full CSI feedback scheme.