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:
Mar. 11, 2008
Filed:
Oct. 24, 2002
Sung Uk Moon, Yokosuka, JP;
Toshiyuki Futakata, Yokosuka, JP;
Sung Uk Moon, Yokosuka, JP;
Toshiyuki Futakata, Yokosuka, JP;
NTT DoCoMo, Inc., Tokyo, JP;
Abstract
The present invention provides a radio base station using the conventional downlink transmit diversity which can compensate for the degradation of transmission quality even when a plurality of users (mobile terminals) share a single time slot using a code division multiple system. The radio base station includes a channel estimatorfor performing channel estimation of an uplink time slot; a transmit diversity controllertofor controlling the transmit diversity used for downlink time slots DLto DL#N based on said channel estimation and the number of users sharing the downlink time slot when using a code division multiple system; a data transmitterfor transmitting data via downlink time slots DLto DL#N using the controlled transmit diversity.