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. 03, 2015
Filed:
Apr. 30, 2009
Jianjun LI, Seongnam-si, KR;
Zhengzi LI, Seongnam-si, KR;
Jung Nam Yun, San Jose, CA (US);
Dong Jun Lee, Seoul, KR;
Jae Hyeong Kim, Seoul, KR;
Jianjun Li, Seongnam-si, KR;
Zhengzi Li, Seongnam-si, KR;
Jung Nam Yun, San Jose, CA (US);
Dong Jun Lee, Seoul, KR;
Jae Hyeong Kim, Seoul, KR;
Intellectual Discovery Co., Ltd., Seoul, KR;
Abstract
Disclosed is a frame transmission method using precoding for supporting MU-MIMO, which facilitates to reduce overhead of a downlink frame in a wireless communication system of FDD method, and a base station supporting that method. The frame transmission method comprises calculating a precoding matrix of a present frame based on channel state information (CSI) of each mobile station and a precoding matrix of a prior frame; precoding a dedicated pilot and downlink data to be transmitted to the mobile station by the use of precoding matrix of the present frame; and transmitting a downlink frame including the precoded dedicated pilot and precoded downlink data to the corresponding mobile station.