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. 05, 2011
Filed:
Mar. 01, 2007
Chang-soo Koo, Melville, NY (US);
Jin Wang, Central Islip, NY (US);
Robert Lind Olesen, Huntington, NY (US);
Arty Chandra, Manhasset Hills, NY (US);
Peter J. Voltz, Commack, NY (US);
Chia-pang Yen, Regal Park, NY (US);
Chang-Soo Koo, Melville, NY (US);
Jin Wang, Central Islip, NY (US);
Robert Lind Olesen, Huntington, NY (US);
Arty Chandra, Manhasset Hills, NY (US);
Peter J. Voltz, Commack, NY (US);
Chia-Pang Yen, Regal Park, NY (US);
InterDigital Technology Corporation, Wilmington, DE (US);
Abstract
A method and apparatus for calibration and channel state feedback to support transmit beamforming in a multiple-input multiple-output (MIMO) system are disclosed. For radio frequency (RF) calibration, a first station (STA) sends a calibration request to a second STA, and the second STA sends a sounding packet to the first STA. The first STA receives the sounding packet, performs at least one channel measurement and performs calibration based on the channel measurement. For channel state feedback, the first STA sends a channel state feedback request to the second STA. The second STA sends a sounding packet to the first STA. The first STA receives the sounding packet and performs at least one channel measurement with the sounding packet. The first STA then calculates a steering matrix for transmit beamforming based on the channel measurement.